Cast Pump & Gearbox Housings
Sand-cast pump and gearbox housings in grey iron and alloy steel, machined on the critical faces to the drawing.
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Casting Parts
Cast Pulleys & Bushings
Cast pulleys, sheaves and bearing bushes, machined at the bore and rim so they run concentric.
| Casting weight | 1 – 300 kg per part |
|---|---|
| Tolerance | ±1.5 mm as-cast; ±0.10 mm after machining |
| Casting standard | JB/T 7946 general casting tolerance |
About this part
What it is and why it is made that way
A cast pulley is machined where it matters: the bore, the rim and the keyway. Running the rim and the bore concentric is what keeps the belt tracking straight. Bushings are pressed or cast in place, then the bore is bored and honed to give a proper running surface.
- Bore, rim and keyway machined to the specified dimensions
- Bushes pressed or cast in, then bored and honed
- Grooves machined to the belt or rope section
- Static balance checked on every casting
Materials
- Grey cast iron HT250
- Ductile iron QT500-7
- Alloy cast steel ZG270-500
- Aluminium ADC12 / A356
Production processes
- Sand casting
- Resin sand casting
- Green sand casting
- Core making
- Shot blasting
Typical applications
- Vee and timing belt pulleys
- Cable and rope sheaves
- Plain bearing bushes
- Idlers and tensioners
Specification
Technical detail
The ranges below are what this shop typically holds. Anything tighter than the baseline is possible — send the drawing and we will confirm it against your specific tolerances rather than quote from a table.
| Casting weight | 1 – 300 kg per part |
|---|---|
| Tolerance | ±1.5 mm as-cast; ±0.10 mm after machining |
| Casting standard | JB/T 7946 general casting tolerance |
| Machining | Datum-based machining against customer drawings |
| Inspection | Material and dimensional report issued per heat |
| Bore | H7, to drawing |
| Concentricity | ≤0.05 mm between bore and rim |
| Casting weight | 1 – 60 kg per part |
Material and finish are yours to choose. The lists above are the families this part is normally made in. We will not substitute a grade or change a tolerance without telling you first — and asking.
In the same process line
Other Casting parts
If this is not quite your part, these are made on the same equipment with the same inspection.
Cast Brackets & Valve Bodies
Cast valve bodies and support brackets in cast iron, with the flow path cored and the sealing faces machined.
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Cast Flanges & Manifold Bodies
Cast iron flanges and manifold bodies, drilled and faced to the specified bolt pattern and pressure rating.
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Get a quote for this part
Send the drawing and we will quote it against your material, your tolerance and your quantity. One business day, in writing, with a lead time you can plan around.