![[THK] — BK Support Unit (Fixed Side, Square Type, for Ball Screw)](https://prosourcemro.com/wp-content/uploads/2026/05/001-892-1024x1024.png)
Ball Screws
THK
[THK] — BK Support Unit (Fixed Side, Square Type, for Ball Screw)
Family ID: THK-BK
THK BK-type Ball Screw Support Unit (fixed side, square housing). High-rigidity low-torque angular contact bearing optimized for ball screw rigidity balance. Square and circular housing types available. Compact and simple mounting. Shaft diameter range φ10~40mm.
9 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BK10 | THK BK10, Fixed Side Support Unit, φ10mm | THK | Shaft Diameter: φ10mm | Housing Length L: 25mm | L1: 5mm | L2: 29mm | L3: 5mm | Width B: 60mm | Height H: 39mm | b: 30mm | h1: 22mm | B1: 34mm | H1: 32.5mm | Bearing: 7000 equivalent (DF P5) | Mass: 0.39kg | Type: Fixed Side, Square Housing (BK) | ||
| BK12 | THK BK12, Fixed Side Support Unit, φ12mm | THK | Shaft Diameter: φ12mm | Housing Length L: 25mm | L1: 5mm | L2: 29mm | L3: 5mm | Width B: 60mm | Height H: 43mm | b: 30mm | h1: 25mm | B1: 35mm | H1: 32.5mm | Bearing: 7001 equivalent (DF P5) | Mass: 0.41kg | Type: Fixed Side, Square Housing (BK) | ||
| BK15 | THK BK15, Fixed Side Support Unit, φ15mm | THK | Shaft Diameter: φ15mm | Housing Length L: 27mm | L1: 6mm | L2: 32mm | L3: 6mm | Width B: 70mm | Height H: 48mm | b: 35mm | h1: 28mm | B1: 40mm | H1: 38.0mm | Bearing: 7002 equivalent (DF P5) | Mass: 0.57kg | Type: Fixed Side, Square Housing (BK) | ||
| BK17 | THK BK17, Fixed Side Support Unit, φ17mm | THK | Shaft Diameter: φ17mm | Housing Length L: 35mm | L1: 9mm | L2: 44mm | L3: 7mm | Width B: 86mm | Height H: 64mm | b: 43mm | h1: 39mm | B1: 50mm | H1: 55.0mm | Bearing: 7203 equivalent (DF P5) | Mass: 1.27kg | Type: Fixed Side, Square Housing (BK) | ||
| BK20 | THK BK20, Fixed Side Support Unit, φ20mm | THK | Shaft Diameter: φ20mm | Housing Length L: 35mm | L1: 8mm | L2: 43mm | L3: 8mm | Width B: 88mm | Height H: 60mm | b: 44mm | h1: 34mm | B1: 52mm | H1: 50.0mm | Bearing: 7004 equivalent (DF P5) | Mass: 1.19kg | Type: Fixed Side, Square Housing (BK) | ||
| BK25 | THK BK25, Fixed Side Support Unit, φ25mm | THK | Shaft Diameter: φ25mm | Housing Length L: 42mm | L1: 12mm | L2: 54mm | L3: 9mm | Width B: 106mm | Height H: 80mm | b: 53mm | h1: 48mm | B1: 64mm | H1: 70.0mm | Bearing: 7205 equivalent (DF P5) | Mass: 2.3kg | Type: Fixed Side, Square Housing (BK) | ||
| BK30 | THK BK30, Fixed Side Support Unit, φ30mm | THK | Shaft Diameter: φ30mm | Housing Length L: 45mm | L1: 14mm | L2: 61mm | L3: 9mm | Width B: 128mm | Height H: 89mm | b: 64mm | h1: 51mm | B1: 76mm | H1: 78.0mm | Bearing: 7206 equivalent (DF P5) | Mass: 3.32kg | Type: Fixed Side, Square Housing (BK) | ||
| BK35 | THK BK35, Fixed Side Support Unit, φ35mm | THK | Shaft Diameter: φ35mm | Housing Length L: 50mm | L1: 14mm | L2: 67mm | L3: 12mm | Width B: 140mm | Height H: 96mm | b: 70mm | h1: 52mm | B1: 88mm | H1: 79.0mm | Bearing: 7207 equivalent (DF P5) | Mass: 4.33kg | Type: Fixed Side, Square Housing (BK) | ||
| BK40 | THK BK40, Fixed Side Support Unit, φ40mm | THK | Shaft Diameter: φ40mm | Housing Length L: 61mm | L1: 18mm | L2: 76mm | L3: 15mm | Width B: 160mm | Height H: 110mm | b: 80mm | h1: 60mm | B1: 100mm | H1: 90.0mm | Bearing: 7208 equivalent (DF P5) | Mass: 6.5kg | Type: Fixed Side, Square Housing (BK) |
