![[THK] — Change Nut DCMB (Flange Long, 45° Lead Angle)](https://prosourcemro.com/wp-content/uploads/2026/05/001-1044-1024x768.png)
Ball Screws
THK
[THK] — Change Nut DCMB (Flange Long, 45° Lead Angle)
Family ID: THK-DCMB
THK DCMB Change Nut, long flange type with 45° lead angle. Longer nut length vs DCMA for higher load capacity. DCMB8T/12T: miniature type using oil-impregnated plastic. 11 sizes DCMB8T~DCMB50. DCMB40/45/50: order basis only (sold as set with CT shaft). Compatible with CT series multi-start screw shafts.
11 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| DCMB8T | THK Change Nut DCMB8T, D=15mm, L=16mm, 45° lead | THK | Outer Diameter (D): 15 mm (special) | Nut Length (L): 16 mm | Flange Diameter (D1): 28 mm | Flange Height (H): 4 mm | Bolt Hole Diameter (B): 3.4 mm | Bolt PCD: 21 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT8T | Availability: Standard stock | Material: Oil-impregnated plastic (miniature type) | ||
| DCMB12T | THK Change Nut DCMB12T, D=20mm, L=25mm, 45° lead | THK | Outer Diameter (D): 20 mm (special) | Nut Length (L): 25 mm | Flange Diameter (D1): 36 mm | Flange Height (H): 5 mm | Bolt Hole Diameter (B): 4.5 mm | Bolt PCD: 27 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT12T | Availability: Standard stock | Material: Oil-impregnated plastic (miniature type) | ||
| DCMB15T | THK Change Nut DCMB15T, D=22mm, L=30mm, 45° lead | THK | Outer Diameter (D): 22 mm (0/-0.052) | Nut Length (L): 30 mm | Flange Diameter (D1): 44 mm | Flange Height (H): 6 mm | Bolt Hole Diameter (B): 5.4 mm | Bolt PCD: 31 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT15T | Availability: Standard stock | ||
| DCMB17T | THK Change Nut DCMB17T, D=28mm, L=35mm, 45° lead | THK | Outer Diameter (D): 28 mm (0/-0.052) | Nut Length (L): 35 mm | Flange Diameter (D1): 51 mm | Flange Height (H): 7 mm | Bolt Hole Diameter (B): 6.6 mm | Bolt PCD: 38 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT17T | Availability: Standard stock | ||
| DCMB20T | THK Change Nut DCMB20T, D=32mm, L=40mm, 45° lead | THK | Outer Diameter (D): 32 mm (0/-0.062) | Nut Length (L): 40 mm | Flange Diameter (D1): 56 mm | Flange Height (H): 7 mm | Bolt Hole Diameter (B): 6.6 mm | Bolt PCD: 42 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT20T | Availability: Standard stock | ||
| DCMB25T | THK Change Nut DCMB25T, D=36mm, L=50mm, 45° lead | THK | Outer Diameter (D): 36 mm (0/-0.062) | Nut Length (L): 50 mm | Flange Diameter (D1): 61 mm | Flange Height (H): 8 mm | Bolt Hole Diameter (B): 6.6 mm | Bolt PCD: 47 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT25T | Availability: Standard stock | ||
| DCMB30T | THK Change Nut DCMB30T, D=44mm, L=56mm, 45° lead | THK | Outer Diameter (D): 44 mm (0/-0.062) | Nut Length (L): 56 mm | Flange Diameter (D1): 76 mm | Flange Height (H): 10 mm | Bolt Hole Diameter (B): 9.0 mm | Bolt PCD: 58 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT30T | Availability: Standard stock | ||
| DCMB35T | THK Change Nut DCMB35T, D=52mm, L=60mm, 45° lead | THK | Outer Diameter (D): 52 mm (0/-0.074) | Nut Length (L): 60 mm | Flange Diameter (D1): 84 mm | Flange Height (H): 10 mm | Bolt Hole Diameter (B): 9.0 mm | Bolt PCD: 66 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT35T | Availability: Standard stock | ||
| DCMB40 | THK Change Nut DCMB40, D=58mm, L=70mm, 45° lead | THK | Outer Diameter (D): 58 mm (0/-0.074) | Nut Length (L): 70 mm | Flange Diameter (D1): 98 mm | Flange Height (H): 12 mm | Bolt Hole Diameter (B): 11.0 mm | Bolt PCD: 76 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT40 | Availability: Order basis only; sold as set with CT shaft | ||
| DCMB45 | THK Change Nut DCMB45, D=64mm, L=75mm, 45° lead | THK | Outer Diameter (D): 64 mm (0/-0.074) | Nut Length (L): 75 mm | Flange Diameter (D1): 104 mm | Flange Height (H): 12 mm | Bolt Hole Diameter (B): 11.0 mm | Bolt PCD: 80 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT45 | Availability: Order basis only; sold as set with CT shaft | ||
| DCMB50 | THK Change Nut DCMB50, D=68mm, L=80mm, 45° lead | THK | Outer Diameter (D): 68 mm (0/-0.074) | Nut Length (L): 80 mm | Flange Diameter (D1): 109 mm | Flange Height (H): 12 mm | Bolt Hole Diameter (B): 11.0 mm | Bolt PCD: 85 mm | Lead Angle: 45° | Mounting Type: Flange (4-bolt) | Compatible Shaft: CT50 | Availability: Order basis only; sold as set with CT shaft |
