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Ball Cages

8 products ball-cages ✕

[THK] — Ball Cage Type B (for Cross Roller Guide / Ball Guide)

Ball Cage Type B for use with THK Cross Roller Guide (VR series) ball guide configuration. 8 sizes available: B1~B15, compatible with V1~V15 rails. Ball diameter range 1.0~15.081 mm. Basic dynamic load rating C_Z = 7.84~490 N per ball; static C0Z = 21.6~2160 N per ball. Specify required number of balls when ordering. Used in combination with ball guide rails per A7-26 specifications.

Brand: THK Category: Ball Cages 8 models

Product Code	Description	Brand	Spec
B1	THK Ball Cage Type B B1, Da=1.0mm, for V1 rail	THK	Ball Diameter (Da): 1.0 mm \| Cage Thickness (t): 0.2 mm \| Width (B): 3.5 mm \| Ball Pitch (P): 2.5 mm \| Edge Distance (g): 2.0 mm \| Basic Dynamic Load Rating C_Z: 7.84 N (per ball) \| Basic Static Load Rating C0Z: 21.6 N (per ball) \| Compatible Rail: V1 \| Note: Specify required number of balls when ordering
B2	THK Ball Cage Type B B2, Da=2.0mm, for V2 rail	THK	Ball Diameter (Da): 2.0 mm \| Cage Thickness (t): 0.3 mm \| Width (B): 5.0 mm \| Ball Pitch (P): 4.0 mm \| Edge Distance (g): 3.0 mm \| Basic Dynamic Load Rating C_Z: 12.7 N (per ball) \| Basic Static Load Rating C0Z: 39.2 N (per ball) \| Compatible Rail: V2 \| Note: Specify required number of balls when ordering
B3	THK Ball Cage Type B B3, Da=3.0mm, for V3 rail	THK	Ball Diameter (Da): 3.0 mm \| Cage Thickness (t): 0.4 mm \| Width (B): 7.0 mm \| Ball Pitch (P): 6.0 mm \| Edge Distance (g): 4.5 mm \| Basic Dynamic Load Rating C_Z: 27.5 N (per ball) \| Basic Static Load Rating C0Z: 87.3 N (per ball) \| Compatible Rail: V3 \| Note: Specify required number of balls when ordering
B4	THK Ball Cage Type B B4, Da=4.0mm, for V4 rail	THK	Ball Diameter (Da): 4.0 mm \| Cage Thickness (t): 0.5 mm \| Width (B): 9.0 mm \| Ball Pitch (P): 7.0 mm \| Edge Distance (g): 4.5 mm \| Basic Dynamic Load Rating C_Z: 45.1 N (per ball) \| Basic Static Load Rating C0Z: 155.0 N (per ball) \| Compatible Rail: V4 \| Note: Specify required number of balls when ordering
B6	THK Ball Cage Type B B6, Da=6.0mm, for V6 rail	THK	Ball Diameter (Da): 6.0 mm \| Cage Thickness (t): 0.6 mm \| Width (B): 13.5 mm \| Ball Pitch (P): 10.0 mm \| Edge Distance (g): 6.0 mm \| Basic Dynamic Load Rating C_Z: 98.0 N (per ball) \| Basic Static Load Rating C0Z: 353.0 N (per ball) \| Compatible Rail: V6 \| Note: Specify required number of balls when ordering
B9	THK Ball Cage Type B B9, Da=9.525mm, for V9 rail	THK	Ball Diameter (Da): 9.525 mm \| Cage Thickness (t): 1.0 mm \| Width (B): 19.0 mm \| Ball Pitch (P): 14.0 mm \| Edge Distance (g): 8.5 mm \| Basic Dynamic Load Rating C_Z: 216.0 N (per ball) \| Basic Static Load Rating C0Z: 784.0 N (per ball) \| Compatible Rail: V9 \| Note: Specify required number of balls when ordering
B12	THK Ball Cage Type B B12, Da=11.906mm, for V12 rail	THK	Ball Diameter (Da): 11.906 mm \| Cage Thickness (t): 1.0 mm \| Width (B): 25.0 mm \| Ball Pitch (P): 20.0 mm \| Edge Distance (g): 12.5 mm \| Basic Dynamic Load Rating C_Z: 324.0 N (per ball) \| Basic Static Load Rating C0Z: 1420.0 N (per ball) \| Compatible Rail: V12 \| Note: Specify required number of balls when ordering
B15	THK Ball Cage Type B B15, Da=15.081mm, for V15 rail	THK	Ball Diameter (Da): 15.081 mm \| Cage Thickness (t): 1.2 mm \| Width (B): 31.0 mm \| Ball Pitch (P): 25.0 mm \| Edge Distance (g): 15.0 mm \| Basic Dynamic Load Rating C_Z: 490.0 N (per ball) \| Basic Static Load Rating C0Z: 2160.0 N (per ball) \| Compatible Rail: V15 \| Note: Specify required number of balls when ordering

[THK] — BS Die Set Ball Cage Inch Ball (BS1955~BS3880)

BS type Die Set Ball Cage — inch steel ball (JIS B 1501). Grooved outer surface to distinguish from KS type. High-rigidity lightweight cage with precision balls (roundness/mutual deviation: 0.0005mm). Balls arranged in helical pattern; non-overlapping ball tracks for long wear-free service life. Shaft diameters: 19~38mm.

Brand: THK Category: Ball Cages 6 models

Product Code	Description	Brand	Spec
BS1955	THK die set ball cage inch, d=19mm, Da=25.35mm, Lm=55mm	THK	Shaft Dia.: d=19mm \| Ball Dia.: dt=3.175mm (inch) \| Cage OD: Da=25.35mm \| Cage Length: Lm=55mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)
BS2260	THK die set ball cage inch, d=22mm, Da=28.35mm, Lm=60mm	THK	Shaft Dia.: d=22mm \| Ball Dia.: dt=3.175mm (inch) \| Cage OD: Da=28.35mm \| Cage Length: Lm=60mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)
BS2565	THK die set ball cage inch, d=25mm, Da=31.35mm, Lm=65mm	THK	Shaft Dia.: d=25mm \| Ball Dia.: dt=3.175mm (inch) \| Cage OD: Da=31.35mm \| Cage Length: Lm=65mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)
BS2870	THK die set ball cage inch, d=28mm, Da=35.938mm, Lm=70mm	THK	Shaft Dia.: d=28mm \| Ball Dia.: dt=3.969mm (inch) \| Cage OD: Da=35.938mm \| Cage Length: Lm=70mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)
BS3275	THK die set ball cage inch, d=32mm, Da=39.938mm, Lm=75mm	THK	Shaft Dia.: d=32mm \| Ball Dia.: dt=3.969mm (inch) \| Cage OD: Da=39.938mm \| Cage Length: Lm=75mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)
BS3880	THK die set ball cage inch, d=38mm, Da=47.525mm, Lm=80mm	THK	Shaft Dia.: d=38mm \| Ball Dia.: dt=4.762mm (inch) \| Cage OD: Da=47.525mm \| Cage Length: Lm=80mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks \| Note: Grooved outer surface (distinguishes from KS)

[THK] — KS Die Set Ball Cage Metric Ball (KS1955~KS3880)

KS type Die Set Ball Cage — metric steel ball (JIS B 1501). High-rigidity lightweight cage with precision balls (roundness/mutual deviation: 0.0005mm). Balls arranged in helical pattern; non-overlapping ball tracks for long wear-free service life. Shaft diameters: 19~38mm.

Brand: THK Category: Ball Cages 6 models

Product Code	Description	Brand	Spec
KS1955	THK die set ball cage metric, d=19mm, Da=25mm, Lm=55mm	THK	Shaft Dia.: d=19mm \| Ball Dia.: dt=3mm (metric) \| Cage OD: Da=25mm \| Cage Length: Lm=55mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks
KS2260	THK die set ball cage metric, d=22mm, Da=28mm, Lm=60mm	THK	Shaft Dia.: d=22mm \| Ball Dia.: dt=3mm (metric) \| Cage OD: Da=28mm \| Cage Length: Lm=60mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks
KS2565	THK die set ball cage metric, d=25mm, Da=31mm, Lm=65mm	THK	Shaft Dia.: d=25mm \| Ball Dia.: dt=3mm (metric) \| Cage OD: Da=31mm \| Cage Length: Lm=65mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks
KS2870	THK die set ball cage metric, d=28mm, Da=36mm, Lm=70mm	THK	Shaft Dia.: d=28mm \| Ball Dia.: dt=4mm (metric) \| Cage OD: Da=36mm \| Cage Length: Lm=70mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks
KS3275	THK die set ball cage metric, d=32mm, Da=40mm, Lm=75mm	THK	Shaft Dia.: d=32mm \| Ball Dia.: dt=4mm (metric) \| Cage OD: Da=40mm \| Cage Length: Lm=75mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks
KS3880	THK die set ball cage metric, d=38mm, Da=48mm, Lm=80mm	THK	Shaft Dia.: d=38mm \| Ball Dia.: dt=5mm (metric) \| Cage OD: Da=48mm \| Cage Length: Lm=80mm \| Ball Standard: JIS B 1501 \| Ball Arrangement: Helical, non-overlapping tracks

[THK] — MST Miniature Stroke Ball Cage Unit (MST3-A~MST6-C)

MST type Miniature Stroke Unit — high-precision ball cage with outer shell and ST shaft. Point contact between balls and raceway minimizes rolling resistance for smooth linear motion. Three length variants: A (Lm=10mm), B (Lm=15mm), C (Lm=20mm). Shaft diameters: 3~6mm. Radial clearance -2~+5μm standard; C1 preload option available.

Brand: THK Category: Ball Cages 12 models

Product Code	Description	Brand	Spec
MST3-A	THK miniature stroke unit, shaft φ5mm, ST shaft φ3mm, Lm=10mm	THK	Shaft Dia.: dS=5mm \| ST Shaft Dia.: dt=3mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=10mm \| Length Variant: A \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST3-B	THK miniature stroke unit, shaft φ5mm, ST shaft φ3mm, Lm=15mm	THK	Shaft Dia.: dS=5mm \| ST Shaft Dia.: dt=3mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=15mm \| Length Variant: B \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST3-C	THK miniature stroke unit, shaft φ5mm, ST shaft φ3mm, Lm=20mm	THK	Shaft Dia.: dS=5mm \| ST Shaft Dia.: dt=3mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=20mm \| Length Variant: C \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST4-A	THK miniature stroke unit, shaft φ6mm, ST shaft φ4mm, Lm=10mm	THK	Shaft Dia.: dS=6mm \| ST Shaft Dia.: dt=4mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=10mm \| Length Variant: A \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST4-B	THK miniature stroke unit, shaft φ6mm, ST shaft φ4mm, Lm=15mm	THK	Shaft Dia.: dS=6mm \| ST Shaft Dia.: dt=4mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=15mm \| Length Variant: B \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST4-C	THK miniature stroke unit, shaft φ6mm, ST shaft φ4mm, Lm=20mm	THK	Shaft Dia.: dS=6mm \| ST Shaft Dia.: dt=4mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=20mm \| Length Variant: C \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST5-A	THK miniature stroke unit, shaft φ7mm, ST shaft φ5mm, Lm=10mm	THK	Shaft Dia.: dS=7mm \| ST Shaft Dia.: dt=5mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=10mm \| Length Variant: A \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST5-B	THK miniature stroke unit, shaft φ7mm, ST shaft φ5mm, Lm=15mm	THK	Shaft Dia.: dS=7mm \| ST Shaft Dia.: dt=5mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=15mm \| Length Variant: B \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST5-C	THK miniature stroke unit, shaft φ7mm, ST shaft φ5mm, Lm=20mm	THK	Shaft Dia.: dS=7mm \| ST Shaft Dia.: dt=5mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=20mm \| Length Variant: C \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST6-A	THK miniature stroke unit, shaft φ8mm, ST shaft φ6mm, Lm=10mm	THK	Shaft Dia.: dS=8mm \| ST Shaft Dia.: dt=6mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=10mm \| Length Variant: A \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST6-B	THK miniature stroke unit, shaft φ8mm, ST shaft φ6mm, Lm=15mm	THK	Shaft Dia.: dS=8mm \| ST Shaft Dia.: dt=6mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=15mm \| Length Variant: B \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately
MST6-C	THK miniature stroke unit, shaft φ8mm, ST shaft φ6mm, Lm=20mm	THK	Shaft Dia.: dS=8mm \| ST Shaft Dia.: dt=6mm \| Cage Ball Dia.: Da=1mm \| Cage Length: Lm=20mm \| Length Variant: C \| Radial Clearance: -2~+5μm (C1 preload option available) \| Feature: Point contact; low rolling resistance \| Order: Specify cage + outer shell + ST shaft separately

[THK] — ST Stroke Ball Cage Light Load Long Stroke (ST6~ST100)

ST type Stroke Ball Cage — light load type enabling long stroke. Standard type without seal. Shaft diameters: 6~100mm. Max stroke: 14~138mm.

Brand: THK Category: Ball Cages 18 models

ST type Stroke Ball Cage — light load type enabling long stroke. Standard type without seal. Shaft diameters: 6~100mm. Max stroke: 14~138mm.

Product Code	Description	Brand	Spec
ST6	THK stroke ball cage, shaft φ6mm, OD φ12mm, L=19mm, max stroke 14mm	THK	Shaft Dia.: dr=6mm \| Outer Dia.: D=12mm \| Length: L=19mm \| Max Stroke: 14mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST8	THK stroke ball cage, shaft φ8mm, OD φ15mm, L=24mm, max stroke 24mm	THK	Shaft Dia.: dr=8mm \| Outer Dia.: D=15mm \| Length: L=24mm \| Max Stroke: 24mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST10	THK stroke ball cage, shaft φ10mm, OD φ19mm, L=30mm, max stroke 30mm	THK	Shaft Dia.: dr=10mm \| Outer Dia.: D=19mm \| Length: L=30mm \| Max Stroke: 30mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST12	THK stroke ball cage, shaft φ12mm, OD φ23mm, L=32mm, max stroke 32mm	THK	Shaft Dia.: dr=12mm \| Outer Dia.: D=23mm \| Length: L=32mm \| Max Stroke: 32mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST16	THK stroke ball cage, shaft φ16mm, OD φ28mm, L=37mm, max stroke 40mm	THK	Shaft Dia.: dr=16mm \| Outer Dia.: D=28mm \| Length: L=37mm \| Max Stroke: 40mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST20	THK stroke ball cage, shaft φ20mm, OD φ32mm, L=45mm, max stroke 54mm	THK	Shaft Dia.: dr=20mm \| Outer Dia.: D=32mm \| Length: L=45mm \| Max Stroke: 54mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST25	THK stroke ball cage, shaft φ25mm, OD φ37mm, L=45mm, max stroke 54mm	THK	Shaft Dia.: dr=25mm \| Outer Dia.: D=37mm \| Length: L=45mm \| Max Stroke: 54mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST30	THK stroke ball cage, shaft φ30mm, OD φ45mm, L=65mm, max stroke 82mm	THK	Shaft Dia.: dr=30mm \| Outer Dia.: D=45mm \| Length: L=65mm \| Max Stroke: 82mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST35	THK stroke ball cage, shaft φ35mm, OD φ52mm, L=70mm, max stroke 92mm	THK	Shaft Dia.: dr=35mm \| Outer Dia.: D=52mm \| Length: L=70mm \| Max Stroke: 92mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST40	THK stroke ball cage, shaft φ40mm, OD φ60mm, L=80mm, max stroke 108mm	THK	Shaft Dia.: dr=40mm \| Outer Dia.: D=60mm \| Length: L=80mm \| Max Stroke: 108mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST45	THK stroke ball cage, shaft φ45mm, OD φ65mm, L=80mm, max stroke 108mm	THK	Shaft Dia.: dr=45mm \| Outer Dia.: D=65mm \| Length: L=80mm \| Max Stroke: 108mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST50	THK stroke ball cage, shaft φ50mm, OD φ72mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=50mm \| Outer Dia.: D=72mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST55	THK stroke ball cage, shaft φ55mm, OD φ80mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=55mm \| Outer Dia.: D=80mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST60	THK stroke ball cage, shaft φ60mm, OD φ85mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=60mm \| Outer Dia.: D=85mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST70	THK stroke ball cage, shaft φ70mm, OD φ95mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=70mm \| Outer Dia.: D=95mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST80	THK stroke ball cage, shaft φ80mm, OD φ110mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=80mm \| Outer Dia.: D=110mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST90	THK stroke ball cage, shaft φ90mm, OD φ120mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=90mm \| Outer Dia.: D=120mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Standard (no seal) \| Load: Light load, long stroke
ST100	THK stroke ball cage, shaft φ100mm, OD φ130mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=100mm \| Outer Dia.: D=130mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Standard (no seal) \| Load: Light load, long stroke

[THK] — ST-B Stroke Ball Cage with Seal Light Load Long Stroke (ST8B~ST100B)

ST-B type Stroke Ball Cage — light load long stroke with seal. Seal attached for dust and contamination protection. Shaft diameters: 8~100mm. Max stroke: 24~138mm.

Brand: THK Category: Ball Cages 17 models

ST-B type Stroke Ball Cage — light load long stroke with seal. Seal attached for dust and contamination protection. Shaft diameters: 8~100mm. Max stroke: 24~138mm.

Product Code	Description	Brand	Spec
ST8B	THK stroke ball cage seal type, shaft φ8mm, OD φ15mm, L=24mm, max stroke 24mm	THK	Shaft Dia.: dr=8mm \| Outer Dia.: D=15mm \| Length: L=24mm \| Max Stroke: 24mm \| Type: Seal type \| Load: Light load, long stroke
ST10B	THK stroke ball cage seal type, shaft φ10mm, OD φ19mm, L=30mm, max stroke 30mm	THK	Shaft Dia.: dr=10mm \| Outer Dia.: D=19mm \| Length: L=30mm \| Max Stroke: 30mm \| Type: Seal type \| Load: Light load, long stroke
ST12B	THK stroke ball cage seal type, shaft φ12mm, OD φ23mm, L=32mm, max stroke 32mm	THK	Shaft Dia.: dr=12mm \| Outer Dia.: D=23mm \| Length: L=32mm \| Max Stroke: 32mm \| Type: Seal type \| Load: Light load, long stroke
ST16B	THK stroke ball cage seal type, shaft φ16mm, OD φ28mm, L=37mm, max stroke 40mm	THK	Shaft Dia.: dr=16mm \| Outer Dia.: D=28mm \| Length: L=37mm \| Max Stroke: 40mm \| Type: Seal type \| Load: Light load, long stroke
ST20B	THK stroke ball cage seal type, shaft φ20mm, OD φ32mm, L=45mm, max stroke 54mm	THK	Shaft Dia.: dr=20mm \| Outer Dia.: D=32mm \| Length: L=45mm \| Max Stroke: 54mm \| Type: Seal type \| Load: Light load, long stroke
ST25B	THK stroke ball cage seal type, shaft φ25mm, OD φ37mm, L=45mm, max stroke 54mm	THK	Shaft Dia.: dr=25mm \| Outer Dia.: D=37mm \| Length: L=45mm \| Max Stroke: 54mm \| Type: Seal type \| Load: Light load, long stroke
ST30B	THK stroke ball cage seal type, shaft φ30mm, OD φ45mm, L=65mm, max stroke 82mm	THK	Shaft Dia.: dr=30mm \| Outer Dia.: D=45mm \| Length: L=65mm \| Max Stroke: 82mm \| Type: Seal type \| Load: Light load, long stroke
ST35B	THK stroke ball cage seal type, shaft φ35mm, OD φ52mm, L=70mm, max stroke 92mm	THK	Shaft Dia.: dr=35mm \| Outer Dia.: D=52mm \| Length: L=70mm \| Max Stroke: 92mm \| Type: Seal type \| Load: Light load, long stroke
ST40B	THK stroke ball cage seal type, shaft φ40mm, OD φ60mm, L=80mm, max stroke 108mm	THK	Shaft Dia.: dr=40mm \| Outer Dia.: D=60mm \| Length: L=80mm \| Max Stroke: 108mm \| Type: Seal type \| Load: Light load, long stroke
ST45B	THK stroke ball cage seal type, shaft φ45mm, OD φ65mm, L=80mm, max stroke 108mm	THK	Shaft Dia.: dr=45mm \| Outer Dia.: D=65mm \| Length: L=80mm \| Max Stroke: 108mm \| Type: Seal type \| Load: Light load, long stroke
ST50B	THK stroke ball cage seal type, shaft φ50mm, OD φ72mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=50mm \| Outer Dia.: D=72mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Seal type \| Load: Light load, long stroke
ST55B	THK stroke ball cage seal type, shaft φ55mm, OD φ80mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=55mm \| Outer Dia.: D=80mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Seal type \| Load: Light load, long stroke
ST60B	THK stroke ball cage seal type, shaft φ60mm, OD φ85mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=60mm \| Outer Dia.: D=85mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Seal type \| Load: Light load, long stroke
ST70B	THK stroke ball cage seal type, shaft φ70mm, OD φ95mm, L=100mm, max stroke 138mm	THK	Shaft Dia.: dr=70mm \| Outer Dia.: D=95mm \| Length: L=100mm \| Max Stroke: 138mm \| Type: Seal type \| Load: Light load, long stroke
ST80B	THK stroke ball cage seal type, shaft φ80mm, OD φ110mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=80mm \| Outer Dia.: D=110mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Seal type \| Load: Light load, long stroke
ST90B	THK stroke ball cage seal type, shaft φ90mm, OD φ120mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=90mm \| Outer Dia.: D=120mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Seal type \| Load: Light load, long stroke
ST100B	THK stroke ball cage seal type, shaft φ100mm, OD φ130mm, L=100mm, max stroke 132mm	THK	Shaft Dia.: dr=100mm \| Outer Dia.: D=130mm \| Length: L=100mm \| Max Stroke: 132mm \| Type: Seal type \| Load: Light load, long stroke

[THK] — ST-UU Stroke Ball Cage Double Seal (ST8UU~ST100UU)

ST-UU type Stroke Ball Cage — double seal (UU) attached. Light load long stroke with dust/contamination protection. Shaft diameters: 8~100mm.

Brand: THK Category: Ball Cages 17 models

ST-UU type Stroke Ball Cage — double seal (UU) attached. Light load long stroke with dust/contamination protection. Shaft diameters: 8~100mm.

Product Code	Description	Brand	Spec
ST8UU	THK stroke ball cage double seal, shaft φ8mm, OD φ15mm, max stroke 14mm	THK	Shaft Dia.: dr=8mm \| Outer Dia.: D=15mm \| Length: L=24mm \| Max Stroke: 14mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST10UU	THK stroke ball cage double seal, shaft φ10mm, OD φ19mm, max stroke 16mm	THK	Shaft Dia.: dr=10mm \| Outer Dia.: D=19mm \| Length: L=30mm \| Max Stroke: 16mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST12UU	THK stroke ball cage double seal, shaft φ12mm, OD φ23mm, max stroke 17mm	THK	Shaft Dia.: dr=12mm \| Outer Dia.: D=23mm \| Length: L=32mm \| Max Stroke: 17mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST16UU	THK stroke ball cage double seal, shaft φ16mm, OD φ28mm, max stroke 24mm	THK	Shaft Dia.: dr=16mm \| Outer Dia.: D=28mm \| Length: L=37mm \| Max Stroke: 24mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST20UU	THK stroke ball cage double seal, shaft φ20mm, OD φ32mm, max stroke 32mm	THK	Shaft Dia.: dr=20mm \| Outer Dia.: D=32mm \| Length: L=45mm \| Max Stroke: 32mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST25UU	THK stroke ball cage double seal, shaft φ25mm, OD φ37mm, max stroke 32mm	THK	Shaft Dia.: dr=25mm \| Outer Dia.: D=37mm \| Length: L=45mm \| Max Stroke: 32mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST30UU	THK stroke ball cage double seal, shaft φ30mm, OD φ45mm, max stroke 65mm	THK	Shaft Dia.: dr=30mm \| Outer Dia.: D=45mm \| Length: L=65mm \| Max Stroke: 65mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST35UU	THK stroke ball cage double seal, shaft φ35mm, OD φ52mm, max stroke 75mm	THK	Shaft Dia.: dr=35mm \| Outer Dia.: D=52mm \| Length: L=70mm \| Max Stroke: 75mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST40UU	THK stroke ball cage double seal, shaft φ40mm, OD φ60mm, max stroke 91mm	THK	Shaft Dia.: dr=40mm \| Outer Dia.: D=60mm \| Length: L=80mm \| Max Stroke: 91mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST45UU	THK stroke ball cage double seal, shaft φ45mm, OD φ65mm, max stroke 91mm	THK	Shaft Dia.: dr=45mm \| Outer Dia.: D=65mm \| Length: L=80mm \| Max Stroke: 91mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST50UU	THK stroke ball cage double seal, shaft φ50mm, OD φ72mm, max stroke 120mm	THK	Shaft Dia.: dr=50mm \| Outer Dia.: D=72mm \| Length: L=100mm \| Max Stroke: 120mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST55UU	THK stroke ball cage double seal, shaft φ55mm, OD φ80mm, max stroke 120mm	THK	Shaft Dia.: dr=55mm \| Outer Dia.: D=80mm \| Length: L=100mm \| Max Stroke: 120mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST60UU	THK stroke ball cage double seal, shaft φ60mm, OD φ85mm, max stroke 120mm	THK	Shaft Dia.: dr=60mm \| Outer Dia.: D=85mm \| Length: L=100mm \| Max Stroke: 120mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST70UU	THK stroke ball cage double seal, shaft φ70mm, OD φ95mm, max stroke 120mm	THK	Shaft Dia.: dr=70mm \| Outer Dia.: D=95mm \| Length: L=100mm \| Max Stroke: 120mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST80UU	THK stroke ball cage double seal, shaft φ80mm, OD φ110mm, max stroke 114mm	THK	Shaft Dia.: dr=80mm \| Outer Dia.: D=110mm \| Length: L=100mm \| Max Stroke: 114mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST90UU	THK stroke ball cage double seal, shaft φ90mm, OD φ120mm, max stroke 114mm	THK	Shaft Dia.: dr=90mm \| Outer Dia.: D=120mm \| Length: L=100mm \| Max Stroke: 114mm \| Seal: Double seal (UU) \| Load: Light load, long stroke
ST100UU	THK stroke ball cage double seal, shaft φ100mm, OD φ130mm, max stroke 114mm	THK	Shaft Dia.: dr=100mm \| Outer Dia.: D=130mm \| Length: L=100mm \| Max Stroke: 114mm \| Seal: Double seal (UU) \| Load: Light load, long stroke

[THK] — ST-UUB Stroke Ball Cage Double Seal Heavy Load (ST20UUB~ST100UUB)

ST-UUB type Stroke Ball Cage — double seal, heavy load variant. Shorter stroke than ST-UU; rated load approximately doubled. Shaft diameters: 20~100mm.

Brand: THK Category: Ball Cages 13 models

ST-UUB type Stroke Ball Cage — double seal, heavy load variant. Shorter stroke than ST-UU; rated load approximately doubled. Shaft diameters: 20~100mm.

Product Code	Description	Brand	Spec
ST20UUB	THK stroke ball cage double seal heavy, shaft φ20mm, OD φ32mm, max stroke 12mm	THK	Shaft Dia.: dr=20mm \| Outer Dia.: D=32mm \| Length: L=45mm \| Max Stroke: 12mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST25UUB	THK stroke ball cage double seal heavy, shaft φ25mm, OD φ37mm, max stroke 12mm	THK	Shaft Dia.: dr=25mm \| Outer Dia.: D=37mm \| Length: L=45mm \| Max Stroke: 12mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST30UUB	THK stroke ball cage double seal heavy, shaft φ30mm, OD φ45mm, max stroke 27mm	THK	Shaft Dia.: dr=30mm \| Outer Dia.: D=45mm \| Length: L=65mm \| Max Stroke: 27mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST35UUB	THK stroke ball cage double seal heavy, shaft φ35mm, OD φ52mm, max stroke 37mm	THK	Shaft Dia.: dr=35mm \| Outer Dia.: D=52mm \| Length: L=70mm \| Max Stroke: 37mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST40UUB	THK stroke ball cage double seal heavy, shaft φ40mm, OD φ60mm, max stroke 49mm	THK	Shaft Dia.: dr=40mm \| Outer Dia.: D=60mm \| Length: L=80mm \| Max Stroke: 49mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST45UUB	THK stroke ball cage double seal heavy, shaft φ45mm, OD φ65mm, max stroke 49mm	THK	Shaft Dia.: dr=45mm \| Outer Dia.: D=65mm \| Length: L=80mm \| Max Stroke: 49mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST50UUB	THK stroke ball cage double seal heavy, shaft φ50mm, OD φ72mm, max stroke 70mm	THK	Shaft Dia.: dr=50mm \| Outer Dia.: D=72mm \| Length: L=100mm \| Max Stroke: 70mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST55UUB	THK stroke ball cage double seal heavy, shaft φ55mm, OD φ80mm, max stroke 70mm	THK	Shaft Dia.: dr=55mm \| Outer Dia.: D=80mm \| Length: L=100mm \| Max Stroke: 70mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST60UUB	THK stroke ball cage double seal heavy, shaft φ60mm, OD φ85mm, max stroke 70mm	THK	Shaft Dia.: dr=60mm \| Outer Dia.: D=85mm \| Length: L=100mm \| Max Stroke: 70mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST70UUB	THK stroke ball cage double seal heavy, shaft φ70mm, OD φ95mm, max stroke 70mm	THK	Shaft Dia.: dr=70mm \| Outer Dia.: D=95mm \| Length: L=100mm \| Max Stroke: 70mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST80UUB	THK stroke ball cage double seal heavy, shaft φ80mm, OD φ110mm, max stroke 58mm	THK	Shaft Dia.: dr=80mm \| Outer Dia.: D=110mm \| Length: L=100mm \| Max Stroke: 58mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST90UUB	THK stroke ball cage double seal heavy, shaft φ90mm, OD φ120mm, max stroke 58mm	THK	Shaft Dia.: dr=90mm \| Outer Dia.: D=120mm \| Length: L=100mm \| Max Stroke: 58mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)
ST100UUB	THK stroke ball cage double seal heavy, shaft φ100mm, OD φ130mm, max stroke 58mm	THK	Shaft Dia.: dr=100mm \| Outer Dia.: D=130mm \| Length: L=100mm \| Max Stroke: 58mm \| Seal: Double seal (UU) \| Load: Heavy load (~2x rated load vs ST-UU)