![[THK] — Ball Screw Shaft End J-Type (J1/J2/J3, for BK Support Unit)](https://prosourcemro.com/wp-content/uploads/2026/05/001-889-1024x1024.png)
Ball Screws
THK
[THK] — Ball Screw Shaft End J-Type (J1/J2/J3, for BK Support Unit)
Family ID: THK-J-SHAFT-END
THK recommended shaft end profile J-type (J1, J2, J3) for ball screws. Designed for use with BK-type fixed-side support units. Covers ball screw shaft diameters φ14~55mm. J1: plain, J2: with keyway, J3: with chamfer. Specify shape code at end of ball screw part number (e.g. -J2K).
14 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| J-d14-BK10 | THK Shaft End J-type, φ14mm, BK10 | THK | Ball Screw Shaft Diameter: φ14mm | Support Unit: BK10 | Bearing Shaft Dia A: 10mm | B: 8mm | Thread Length E: 39mm | F: 15mm | Thread M: M10×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d15-BK10 | THK Shaft End J-type, φ15mm, BK10 | THK | Ball Screw Shaft Diameter: φ15mm | Support Unit: BK10 | Bearing Shaft Dia A: 10mm | B: 8mm | Thread Length E: 39mm | F: 15mm | Thread M: M10×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d16-BK12 | THK Shaft End J-type, φ16mm, BK12 | THK | Ball Screw Shaft Diameter: φ16mm | Support Unit: BK12 | Bearing Shaft Dia A: 12mm | B: 10mm | Thread Length E: 39mm | F: 15mm | Thread M: M12×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d18-BK12 | THK Shaft End J-type, φ18mm, BK12 | THK | Ball Screw Shaft Diameter: φ18mm | Support Unit: BK12 | Bearing Shaft Dia A: 12mm | B: 10mm | Thread Length E: 39mm | F: 15mm | Thread M: M12×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d20-BK15 | THK Shaft End J-type, φ20mm, BK15 | THK | Ball Screw Shaft Diameter: φ20mm | Support Unit: BK15 | Bearing Shaft Dia A: 15mm | B: 12mm | Thread Length E: 40mm | F: 20mm | Thread M: M15×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d25-BK17 | THK Shaft End J-type, φ25mm, BK17 | THK | Ball Screw Shaft Diameter: φ25mm | Support Unit: BK17 | Bearing Shaft Dia A: 17mm | B: 15mm | Thread Length E: 53mm | F: 23mm | Thread M: M17×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d28-BK20 | THK Shaft End J-type, φ28mm, BK20 | THK | Ball Screw Shaft Diameter: φ28mm | Support Unit: BK20 | Bearing Shaft Dia A: 20mm | B: 17mm | Thread Length E: 53mm | F: 25mm | Thread M: M20×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d30-BK20 | THK Shaft End J-type, φ30mm, BK20 | THK | Ball Screw Shaft Diameter: φ30mm | Support Unit: BK20 | Bearing Shaft Dia A: 20mm | B: 17mm | Thread Length E: 53mm | F: 25mm | Thread M: M20×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d32-BK20 | THK Shaft End J-type, φ32mm, BK20 | THK | Ball Screw Shaft Diameter: φ32mm | Support Unit: BK20 | Bearing Shaft Dia A: 20mm | B: 17mm | Thread Length E: 53mm | F: 25mm | Thread M: M20×1 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d36-BK25 | THK Shaft End J-type, φ36mm, BK25 | THK | Ball Screw Shaft Diameter: φ36mm | Support Unit: BK25 | Bearing Shaft Dia A: 25mm | B: 20mm | Thread Length E: 65mm | F: 30mm | Thread M: M25×1.5 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d40-BK30 | THK Shaft End J-type, φ40mm, BK30 | THK | Ball Screw Shaft Diameter: φ40mm | Support Unit: BK30 | Bearing Shaft Dia A: 30mm | B: 25mm | Thread Length E: 72mm | F: 38mm | Thread M: M30×1.5 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d45-BK35 | THK Shaft End J-type, φ45mm, BK35 | THK | Ball Screw Shaft Diameter: φ45mm | Support Unit: BK35 | Bearing Shaft Dia A: 35mm | B: 30mm | Thread Length E: 83mm | F: 45mm | Thread M: M35×1.5 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d50-BK40 | THK Shaft End J-type, φ50mm, BK40 | THK | Ball Screw Shaft Diameter: φ50mm | Support Unit: BK40 | Bearing Shaft Dia A: 40mm | B: 35mm | Thread Length E: 98mm | F: 50mm | Thread M: M40×1.5 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) | ||
| J-d55-BK40 | THK Shaft End J-type, φ55mm, BK40 | THK | Ball Screw Shaft Diameter: φ55mm | Support Unit: BK40 | Bearing Shaft Dia A: 40mm | B: 35mm | Thread Length E: 98mm | F: 50mm | Thread M: M40×1.5 | Shape: J1 (plain) / J2 (keyway) / J3 (chamfer) | Type: Shaft End Profile for BK Support Unit (Fixed Side) |
