Motor Housings (Die Cast)
Cast motor housings with integral cooling fins and machined stator seats.
Motor housings cast with the cooling fins in the tool, so the fins cost nothing per part. The stator bore and end faces are machined afterwards, coaxial to each other.
6–8 weeks
250 pieces
ISO 9001:2015 · IATF 16949
Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Stator bore tolerance | H7 | - |
| Bore coaxiality | 0.03 | mm |
| Fin thickness from | 1.5 | mm |
| Wall thickness | 2.5–5.0 | mm |
| Max part weight | 12 | kg |
| Machined faces | ±0.05 | mm |
Available Materials
- AlSi10Mg
- A380 / ADC12
- AlSi12Fe
Typical Applications
- EV traction motors
- Pump motors
- Fan and blower motors
- Stepper motor housings
- Power tool motors
Surface Finishes
- As-cast
- Shot blast
- Powder coat
- Anodise (machined faces)
- Chromate conversion
Industries Served
- Automotive & EV
- Industrial Equipment
- Appliance Manufacturing
- Robotics
- Energy & Oil & Gas
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
- Stator 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
- Fin thickness from at 1.5 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.
- Order size
- Minimum order is 250 pieces, where setup and tooling are amortised across the batch and per-part cost settles around cycle time and material. Below that quantity the same part costs more per piece, not less.
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
- First article inspection to AS9102, because this family carries an aerospace or automotive certificate
The full equipment list, with counts, is on the capability page; the inspection sequence is on quality and inspection.
Questions buyers ask
- Can the cooling fins be cast instead of added later?
- Yes, and that is the point of casting the housing - the fins come out of the tool at no extra cost per part, provided they are at least 1.5 mm thick and drafted.
Related part families
Aluminium Die Cast Housings
High-pressure aluminium housings from 0.5–15 kg, trimmed, machined and sealed-face checked in-house.
Heat Sink Castings
Cast heat sinks with tall thin fins, for electronics that need volume rather than a machined block.
Bearing Housings
Machined housings with bearing seats bored to H7, coaxial to 0.01 mm across the pair.