Forged Bushes & Sleeves
A bush is a sacrificial wear component protecting a more expensive part. Its job is to wear out predictably, on schedule, and be replaced cheaply.
Forged bushes are sacrificial wear components designed to wear before the pin or housing they protect. They are specified softer than the mating pin, machined to H7 or H8 bore tolerance, and supplied with grease grooves and cross-holes for lubrication.
- Bore range
- 10 mm – 250 mm
- Length
- Up to 500 mm
- Materials
- EN8, EN19, 20MnCr5, bronze-lined
- Bore tolerance
- H7 / H8
- Features
- Grease grooves, cross-holes, flanges
Forged Bushes & Sleeves at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Bore range 10 mm to 250 mm
- Bore tolerance H7 or H8
- Designed softer than the mating pin
- Matched pin and bush sets available
Wearing Predictably by Design
The bush should wear rather than the housing or pin. That means selecting hardness deliberately lower than the mating pin, providing grease grooves that actually distribute lubricant, and machining bore tolerance so clearance starts at design value.
- Bush wears, housing does not
- Hardness set below the mating pin
- Grease grooves and holes
- Bore to H7 or H8
Matched Sets
Pin and bush supplied as a clearance-matched set removes the field problem of mixing components from different suppliers with different tolerances. Where machines are rebuilt regularly, matched sets measurably reduce reassembly time.
People also ask
Why should the bush be the part that wears?
Because it is far cheaper and faster to replace than a machined housing or a hardened pin. Making it the sacrificial component is a deliberate maintenance decision.
What causes bushes to fail early?
Inadequate lubrication reaching the bearing surface, contamination entering the clearance, incorrect fit, or a bush harder than the pin so wear transfers to the wrong part.
Can you supply bronze-lined steel bushes?
Yes, forged steel outer with a bronze bearing liner where lower friction or dry-running tolerance is required.
Topics covered on this page
- bush
- bushing
- sleeve
- sacrificial wear
- grease groove
- bore tolerance
- matched set
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Should a bush be harder or softer than the pin?
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Softer, so the bush wears rather than the more expensive pin or housing. It is designed as the sacrificial component.
Do you supply matched pin and bush sets?
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Yes, clearance-matched sets that remove tolerance mismatch during field reassembly.
What bore tolerance do you hold?
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H7 or H8 as specified, with grease grooves and cross-holes machined to drawing.