CNC Machined Couplings
Rigid and flexible coupling bodies bored to H7 with keyways or clamp features.
Coupling bodies machined with the bore and the keyway in one setup, so the key seats parallel to the shaft rather than at an angle. Clamp versions get a slit cut after boring.
How we make it: Precision CNC machining service →
3–5 weeks
10 pieces
ISO 9001:2015
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Bore tolerance | H7 | - |
| Bore range | Ø6–Ø150 | mm |
| Concentricity | 0.02 | mm |
| Keyway | DIN 6885 / ANSI | standard |
| Balancing | On request | - |
| Slit width | ±0.1 | mm |
Available Materials
- Aluminium 6082-T6
- Steel 1045
- Stainless 303
- Bronze C932
Typical Applications
- Motor couplings
- Pump drives
- Encoder mounts
- Test rig shafts
- Conveyor drives
Surface Finishes
- Anodise
- Black oxide
- Zinc plating
- Passivate
- Balanced (on request)
Industries Served
- Industrial Equipment
- Automation
- Energy & Oil & Gas
- Marine
- Water Treatment
What drives the price of this part
Derived from the callouts on this page. Where a driver is not on the drawing, it is not on this list.
- Tolerance
- Bore tolerance at H7 is the tightest callout this family carries. Tightening a callout is a process decision, not a machining decision: below the standard ±0.005 mm the work moves to grinding or jig boring, and the price moves with it.
- Part size
- Bore range at Ø6–Ø150 mm decides which machine the part lands on and how many setups it needs. Size is the driver buyers most often leave out of a first enquiry, and it is the one that changes the quote fastest.
- Material
- The first material listed, Aluminium 6082-T6, rates 9/10 on our machinability scale at 95 HB. On this shop's scale a harder alloy means slower passes and more tool changes, and that is cycle time the quote has to carry.
- Order size
- Minimum order is 10 pieces, so on a first order setup and programming are spread over very few parts and they are most of the price. Repeat orders at the same quantity are cheaper without anything on the drawing changing.
See how cycle time is calculated in the machining time calculator and what else moves a price in the cost driver reference.
How these parts are inspected
Matched to the callouts above and the instruments actually on the floor.
- Coordinate measuring machine (Zeiss CONTURA G2, two machines, GR&R 8.4% on the critical feature)
- Dimensional report against the drawing, with a 100% check on critical features rather than a sample
- Certificate of conformance and the mill certificate with every shipment
- Bore gauges and an optical comparator for hole position and edge form
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Why bore and cut the keyway in one setup?
- So the keyway is parallel to the bore axis. Cut it as a second operation on a different machine and the key sits at a slight angle, which shows up as runout at the driven shaft.
Related part families
Coupling Assemblies
Rigid, flexible and jaw couplings bored to fit your shafts, with keys and inserts fitted.
CNC Machined Bushings
Machined bushings, sleeves and spacers with bored IDs held to H7, flanged on request.
CNC Machined Housings
Machined housings with bored seats and sealing faces, held coaxial to 0.01 mm.