Bushing materials
The material decides what a bushing can carry, how fast, how hot and with what lubrication. These pages give the numbers for each material Bushing MFG works in and the comparisons that settle most selection questions.
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Bronze alloys
Machined cast bronzes, specified by UNS or EN number.
C93200 / SAE 660 bearing bronze
JBM-600. The general-purpose leaded tin bronze: 65–75 HB, 240 N/mm², forgiving of lubrication gaps.
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C86300 manganese bronze
JBM-630. High-strength brass at 225 HB and 758 N/mm² for extreme loads at near-zero speed.
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Bronze bushing material chart
C93200, C93700, C93800, C90500, C83600, C95400, C95500, C86300 compared with EN equivalents.
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Brass vs bronze bushings
Why bearing bronze outlasts free-cutting brass on a loaded shaft.
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Composite and bimetal layers
Steel-backed constructions where a thin layer does the sliding.
PTFE composite (JBM-10)
PTFE running layer on sintered bronze and steel: dry, 250 N/mm², −195 to +280 °C.
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POM composite (JBM-20)
Acetal layer with grease pockets: 250 N/mm² static, PV 22 oiled, to 130 °C.
View moreBimetal linings (JBM-800)
CuPb10Sn10, CuPb24Sn4, CuSn10, AlSn20Cu on steel for oil and grease lubrication.
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What is a DU bushing?
The construction behind the generic name, and how JBM-10 relates to it.
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Steel, sintered bronze and polymers
Hardened steel (JBM-ST)
Grade 45, 40Cr, 20CrMo, GCr15 at HRC 58–62 for 250 N/mm² pin joints.
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Graphite-plugged bronze (JBM-650)
CuZn25Al5Mn4, aluminium and tin bronze bases with graphite or PTFE + MoS₂ plugs.
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Sintered oil-impregnated bronze (JBM-700)
Porous Cu-Sn bronze holding 18–25 % oil for small, light, quiet bearings.
View morePolymers: POM, nylon, UHMWPE, PTFE (JBM-30 series)
Solid plastic bushings for light, wet, quiet or cheap positions.
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Comparisons
Low-friction materials
Coefficients of friction of PTFE, graphite, MoS₂, POM, nylon, bronze and steel compared.
View moreSelf-lubricating bushings
Oil in pores, plugs and PTFE layers: three mechanisms compared.
View moreTypes of bushings
The whole range by shape, material and lubrication on one page.
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Reading the numbers
Every material page quotes load in N/mm² of projected area (force ÷ bore × length), sliding speed in m/s, PV as the product of the two, and a temperature range. These are separate limits: a bushing may be run at the maximum load or the maximum speed, not both, and the PV limit ties them together. Where a value is a catalogue or standard figure rather than a Bushing MFG test result, the page says so.
Not sure which material? Send the duty.
Load, speed, temperature, lubrication and environment: our engineers reply within 12 hours with a material proposal and a quotation. Free samples, no minimum order.