Rigid Shaft Coupling Size & Bore Reference
Use the configuration name to identify outside diameter (OD), overall length (L) and the permitted bore range. The range is not the finished bore size: specify both D1 and D2. These 6061 aluminum rigid couplings do not compensate for shaft misalignment or vibration.
| Example configuration | Meaning |
|---|---|
| OD20 × L20 mm / Bore 4–8 mm | 20 mm outside diameter, 20 mm length. Specify each required bore within the listed 4–8 mm range. |
| OD25 × L40 mm / Bore 4–12 mm | This configuration lists a 12 mm bore maximum; do not apply the 12.7 mm range of other OD25 options to it. |
| Custom Size / Machining Deposit | A separate deposit configuration, not a fully specified standard coupling. Confirm the drawing and full specification before ordering. |
Include these details in your enquiry
Configuration or SKU; OD and L; D1 and D2; required tolerances; keyway requirements; installation clearance; quantity; delivery country. For custom dimensions, send a drawing for confirmation. Do not infer torque, speed or tolerance ratings from the outside diameter alone.
View model names and SKUs
| Model / configuration | SKU |
|---|---|
| OD20 x L20 mm / Bore 4-8 mm | 5996716468413 |
| OD20 x L25 mm / Bore 4-8 mm | 4447052076009 |
| OD20 x L35 mm / Bore 4-8 mm | 4447052076010 |
| OD25 x L25 mm / Bore 4-12.7 mm | 4447052076011 |
| OD25 x L30 mm / Bore 4-12.7 mm | 4447052076012 |
| OD25 x L35 mm / Bore 4-12.7 mm | 6113954215740 |
| OD25 x L40 mm / Bore 4-12 mm | 5996716468414 |
| OD32 x L32 mm / Bore 8-16 mm | 5330276142096 |
| OD32 x L40 mm / Bore 8-16 mm | 4447052076013 |
| OD32 x L45 mm / Bore 8-16 mm | 4447052076014 |
| OD40 x L45 mm / Bore 10-22 mm | 4447052076015 |
| OD40 x L50 mm / Bore 10-22 mm | 4447052076016 |
| OD45 x L60 mm / Bore 10-25 mm | 4621134342346 |
| OD50 x L55 mm / Bore 12-26 mm | 4621134342345 |
| OD55 x L75 mm / Bore 12-30 mm | 4621134342343 |
| OD65 x L80 mm / Bore 15-38 mm | 4621134342347 |
| Custom Size / Machining Deposit | 4621134342344 |
Ask BOLTTE to confirm compatibility. Use the existing model selector to choose a product option; this reference does not add an item to your cart.
BOLTTE Aluminum Rigid Shaft Couplings - 20-65 mm Outer Diameter
These one-piece, slotted 6061 aluminum rigid shaft couplings provide a clamp-type connection for motor, lead-screw and machine-shaft assemblies. They have an oxidized surface and do not compensate for shaft misalignment or vibration, so confirm the assembly and both bore dimensions before ordering.
Size range
- Outer diameters: 20 mm, 25 mm, 32 mm, 40 mm, 45 mm, 50 mm, 55 mm and 65 mm.
- Overall lengths: 20 mm to 80 mm, according to the selected configuration.
- Available bore ranges are listed in the configuration selector.
- This is a rigid coupling and does not compensate for shaft misalignment or vibration.
Specify Both Shaft Bores
- Select the outside diameter and overall length from the listed configuration; available bore ranges depend on that selection.
- Enter both shaft bore dimensions, D1 and D2, in the order requirements. They may differ within the selected bore range.
- Confirm shaft tolerances, any keyway requirements and installation clearance before ordering.
- For the Custom Size / Machining Deposit option, enter all required dimensions before purchase. This option is a machining deposit, not a fully specified standard-size coupling.
Frequently Asked Questions
Can the two shaft bores have different diameters?
Yes. D1 and D2 may differ within the selected bore range. Enter both exact dimensions in the order requirements and confirm the associated tolerances.
Will this coupling compensate for shaft misalignment?
No. This rigid coupling does not compensate for shaft misalignment or vibration.
Does selecting the outside diameter also specify the shaft bores?
No. Select the outside diameter and length, then provide D1 and D2 within that configuration's bore range. Confirm keyway requirements and installation clearance as well.
What is the Custom Size / Machining Deposit option?
It is a machining-deposit configuration for a custom size. Provide all required dimensions in the order requirements before purchase; do not treat the option name as a complete dimensional specification.
Related information: Custom CNC machining; Shipping and return policy.
