![[THK] — BS Die Set Ball Cage Inch Ball (BS1955~BS3880)](https://prosourcemro.com/wp-content/uploads/2026/05/001-1012-1024x695.png)
Ball Cages
THK
[THK] — BS Die Set Ball Cage Inch Ball (BS1955~BS3880)
Family ID: THK-BS
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.
6 product codes available in this family
Product Codes & Specifications
| 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) |
