• THK FK Support Unit (Fixed Side, Circular Type, for Ball Screw)
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THK FK Support Unit (Fixed Side, Circular Type, for Ball Screw)

THK FK Support Unit (Fixed Side, Circular Type, for Ball Screw)

THK FK-type Ball Screw Support Unit (fixed side, circular housing).

Key features

  • High-rigidity low-torque angular contact bearing optimized for ball screw rigidity balance
  • Two mounting methods available (A and B)
  • Compact and simple mounting
  • Shaft diameter range φ4~30mm

Specifications

Type Fixed Side, Circular Housing (FK)
FK4 THK FK4, Fixed Side Support Unit, φ4mm | Shaft Diameter: φ4mm | Housing Length L: 15mm | H: 6mm | F: 9mm | E: 17.5mm | Housing OD D: 18mm | Inner Dia A: 32mm | PCD: 24mm | Width B: 25mm | Bearing: 704 equivalent (DF P5) | Mass: 0.05kg | Type: Fixed Side, Circular Housing (FK)
FK5 THK FK5, Fixed Side Support Unit, φ5mm | Shaft Diameter: φ5mm | Housing Length L: 16.5mm | H: 6mm | F: 10.5mm | E: 18.5mm | Housing OD D: 20mm | Inner Dia A: 34mm | PCD: 26mm | Width B: 26mm | Bearing: 705 equivalent (DF P5) | Mass: 0.06kg | Type: Fixed Side, Circular Housing (FK)
FK6 THK FK6, Fixed Side Support Unit, φ6mm | Shaft Diameter: φ6mm | Housing Length L: 20mm | H: 7mm | F: 13mm | E: 22mm | Housing OD D: 22mm | Inner Dia A: 36mm | PCD: 28mm | Width B: 28mm | Bearing: 706 equivalent (DF P5) | Mass: 0.08kg | Type: Fixed Side, Circular Housing (FK)
FK8 THK FK8, Fixed Side Support Unit, φ8mm | Shaft Diameter: φ8mm | Housing Length L: 23mm | H: 9mm | F: 14mm | E: 26mm | Housing OD D: 28mm | Inner Dia A: 43mm | PCD: 35mm | Width B: 35mm | Bearing: 798 equivalent (DF P5) | Mass: 0.15kg | Type: Fixed Side, Circular Housing (FK)
FK10 THK FK10, Fixed Side Support Unit, φ10mm | Shaft Diameter: φ10mm | Housing Length L: 27mm | H: 10mm | F: 17mm | E: 29.5mm | Housing OD D: 34mm | Inner Dia A: 52mm | PCD: 42mm | Width B: 42mm | Bearing: 7000 equivalent (DF P5) | Mass: 0.21kg | Type: Fixed Side, Circular Housing (FK)
FK12 THK FK12, Fixed Side Support Unit, φ12mm | Shaft Diameter: φ12mm | Housing Length L: 27mm | H: 10mm | F: 17mm | E: 29.5mm | Housing OD D: 36mm | Inner Dia A: 54mm | PCD: 44mm | Width B: 44mm | Bearing: 7001 equivalent (DF P5) | Mass: 0.22kg | Type: Fixed Side, Circular Housing (FK)
FK15 THK FK15, Fixed Side Support Unit, φ15mm | Shaft Diameter: φ15mm | Housing Length L: 32mm | H: 15mm | F: 17mm | E: 36mm | Housing OD D: 40mm | Inner Dia A: 63mm | PCD: 50mm | Width B: 52mm | Bearing: 7002 equivalent (DF P5) | Mass: 0.39kg | Type: Fixed Side, Circular Housing (FK)
FK20 THK FK20, Fixed Side Support Unit, φ20mm | Shaft Diameter: φ20mm | Housing Length L: 52mm | H: 22mm | F: 30mm | E: 50mm | Housing OD D: 57mm | Inner Dia A: 85mm | PCD: 70mm | Width B: 68mm | Bearing: 7204 equivalent (DF P5) | Mass: 1.09kg | Type: Fixed Side, Circular Housing (FK)
FK25 THK FK25, Fixed Side Support Unit, φ25mm | Shaft Diameter: φ25mm | Housing Length L: 57mm | H: 27mm | F: 30mm | E: 60mm | Housing OD D: 63mm | Inner Dia A: 98mm | PCD: 80mm | Width B: 79mm | Bearing: 7205 equivalent (DF P5) | Mass: 1.49kg | Type: Fixed Side, Circular Housing (FK)
FK30 THK FK30, Fixed Side Support Unit, φ30mm | Shaft Diameter: φ30mm | Housing Length L: 62mm | H: 30mm | F: 32mm | E: 61mm | Housing OD D: 75mm | Inner Dia A: 117mm | PCD: 95mm | Width B: 93mm | Bearing: 7206 equivalent (DF P5) | Mass: 2.32kg | Type: Fixed Side, Circular Housing (FK)
Ball ScrewsTHK
10 product codes available in this family
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THK FK Support Unit (Fixed Side, Circular Type, for Ball Screw)

Brand THK·Ball Screws

Available part numbers (10)

FK4, FK5, FK6, FK8, FK10, FK12, FK15, FK20, FK25, FK30

How to order

Send the THK part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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Product codeSpec
FK4THK FK4, Fixed Side Support Unit, φ4mm | Shaft Diameter: φ4mm | Housing Length L: 15mm | H: 6mm | F: 9mm | E: 17.5mm | Housing OD D: 18mm | Inner Dia A: 32mm | PCD: 24mm | Width B: 25mm | Bearing: 704 equivalent (DF P5) | Mass: 0.05kg | Type: Fixed Side, Circular Housing (FK)
FK5THK FK5, Fixed Side Support Unit, φ5mm | Shaft Diameter: φ5mm | Housing Length L: 16.5mm | H: 6mm | F: 10.5mm | E: 18.5mm | Housing OD D: 20mm | Inner Dia A: 34mm | PCD: 26mm | Width B: 26mm | Bearing: 705 equivalent (DF P5) | Mass: 0.06kg | Type: Fixed Side, Circular Housing (FK)
FK6THK FK6, Fixed Side Support Unit, φ6mm | Shaft Diameter: φ6mm | Housing Length L: 20mm | H: 7mm | F: 13mm | E: 22mm | Housing OD D: 22mm | Inner Dia A: 36mm | PCD: 28mm | Width B: 28mm | Bearing: 706 equivalent (DF P5) | Mass: 0.08kg | Type: Fixed Side, Circular Housing (FK)
FK8THK FK8, Fixed Side Support Unit, φ8mm | Shaft Diameter: φ8mm | Housing Length L: 23mm | H: 9mm | F: 14mm | E: 26mm | Housing OD D: 28mm | Inner Dia A: 43mm | PCD: 35mm | Width B: 35mm | Bearing: 798 equivalent (DF P5) | Mass: 0.15kg | Type: Fixed Side, Circular Housing (FK)
FK10THK FK10, Fixed Side Support Unit, φ10mm | Shaft Diameter: φ10mm | Housing Length L: 27mm | H: 10mm | F: 17mm | E: 29.5mm | Housing OD D: 34mm | Inner Dia A: 52mm | PCD: 42mm | Width B: 42mm | Bearing: 7000 equivalent (DF P5) | Mass: 0.21kg | Type: Fixed Side, Circular Housing (FK)
FK12THK FK12, Fixed Side Support Unit, φ12mm | Shaft Diameter: φ12mm | Housing Length L: 27mm | H: 10mm | F: 17mm | E: 29.5mm | Housing OD D: 36mm | Inner Dia A: 54mm | PCD: 44mm | Width B: 44mm | Bearing: 7001 equivalent (DF P5) | Mass: 0.22kg | Type: Fixed Side, Circular Housing (FK)
FK15THK FK15, Fixed Side Support Unit, φ15mm | Shaft Diameter: φ15mm | Housing Length L: 32mm | H: 15mm | F: 17mm | E: 36mm | Housing OD D: 40mm | Inner Dia A: 63mm | PCD: 50mm | Width B: 52mm | Bearing: 7002 equivalent (DF P5) | Mass: 0.39kg | Type: Fixed Side, Circular Housing (FK)
FK20THK FK20, Fixed Side Support Unit, φ20mm | Shaft Diameter: φ20mm | Housing Length L: 52mm | H: 22mm | F: 30mm | E: 50mm | Housing OD D: 57mm | Inner Dia A: 85mm | PCD: 70mm | Width B: 68mm | Bearing: 7204 equivalent (DF P5) | Mass: 1.09kg | Type: Fixed Side, Circular Housing (FK)
FK25THK FK25, Fixed Side Support Unit, φ25mm | Shaft Diameter: φ25mm | Housing Length L: 57mm | H: 27mm | F: 30mm | E: 60mm | Housing OD D: 63mm | Inner Dia A: 98mm | PCD: 80mm | Width B: 79mm | Bearing: 7205 equivalent (DF P5) | Mass: 1.49kg | Type: Fixed Side, Circular Housing (FK)
FK30THK FK30, Fixed Side Support Unit, φ30mm | Shaft Diameter: φ30mm | Housing Length L: 62mm | H: 30mm | F: 32mm | E: 61mm | Housing OD D: 75mm | Inner Dia A: 117mm | PCD: 95mm | Width B: 93mm | Bearing: 7206 equivalent (DF P5) | Mass: 2.32kg | Type: Fixed Side, Circular Housing (FK)

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