High pressure die casting · component page
Motor end shield and end housing
An end shield locates the bearing, closes the motor frame and often carries cooling fins. The bearing seat, the spigot that centres it in the frame and the fixing holes decide whether the motor runs true, so these are the features we plan the casting and machining around.
We make finned end housings and end shields for electric motor builders by high pressure die casting, then machine the bearing seat, spigot and fixing holes on our own CNC and VMC machines. Larger or thicker shields for heavier frames can be gravity cast.
Process, alloys and indicative ranges
| Process | HPDC; gravity for thick walled or larger shields |
|---|---|
| Typical wall | 2.5 to 5 mm, indicative |
| Alloys | ADC12, LM24, LM6; LM25 for gravity |
| Supplied | As cast, semi machined or fully machined |
Ranges are indicative for this kind of part. We confirm process, machine, alloy and tolerances for your design at drawing review.
Critical features and how we check them
| Bearing seat diameter and roundness | Air gauging in house, on every part |
|---|---|
| Spigot diameter and its concentricity to the bearing seat | Air gauging in house; CMM layout through a partner on first articles |
| Fixing hole positions | Functional gauges in house; first article inspection on every new tool |
| Internal soundness around the bearing boss | X ray in house during new component development |
Machining and finishing options
- Bearing seat and spigot machined in one set up where the design allows
- Drilling and tapping on multi head machines
- Shot blasting; powder coating or painting through a partner
Questions that sharpen your quote
- Which bearing and fit class does the seat carry, for example a K6 or M6 housing bore?
- Is the end shield pressed or bolted into the frame?
- Are the fins cosmetic, or rated for a cooling requirement?
- Annual volume for each frame size, and how many sizes share one design?
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Have a motor end shield and end housing to quote?Send the drawing and annual volume. An engineer replies within 48 hours.
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