A bronze-bushed crane sheave has a plain bearing sleeve between its hub and supporting pin. As the wire-rope sheave turns, the bronze bushing provides the sliding surface. For an OEM or replacement project, specify whether you need this sleeve or the complete sheave.
“Crane bronze bushing” can also describe boom heel pins and other joints. Identify the sheave assembly before requesting a quote. This guide covers sheaves originally specified with a bronze sliding bushing.
Where Does the Bronze Bushing Fit in a Crane Sheave?
A wire-rope sheave has a grooved rim and central hub. The bushing sits in the hub bore; the pin passes through it. Often the sheave and bushing rotate around a stationary pin. Confirm the motion and retention on the assembly drawing, especially where several sheaves share a shaft.
The bushing OD seats in the hub; its installed ID needs the specified running clearance at the pin. Pressing in a sleeve may reduce its ID. A nominal pin size alone defines neither fit. See our press fit and running clearance guide.
Check for a cylindrical sleeve, flange, thrust washers or spacers. A flange may locate the sleeve, but its load capacity cannot be inferred from its shape. Specify flanged bronze bushings when the drawing calls for them.
Also identify the wheel’s side clearance in its block or frame. A bushing that projects beyond the hub may affect how the side plates and spacers locate the sheave. The approved section view should show these relationships rather than leaving bushing length to be copied from a worn sample.
A boom pivot bushing is a different part, even when fitted to the same crane.
When Is a Bronze-Bushed Sheave Specified?
Start with the equipment manufacturer’s bearing arrangement. Bronze-bushed and rolling-bearing sheaves can exist within one product family. For a replacement, confirm the original type; any change needs engineering approval. A new sleeve alone does not establish the rating of a modified sheave.
Record line pull, rope deflection angle, line speed and duty cycle. Pin diameter and effective bearing length inform projected pressure; rotation determines sliding speed. Crane rated capacity alone does not establish the load at one sheave. Our bronze bushing PV guide explains the bearing calculation; the equipment designer must assess the lifting arrangement.
One published sheave range uses SAE 660/C93200 cast bronze with a grease groove and offers SAE 841 oil-impregnated bushings as a different construction. These examples do not specify every crane. Confirm the grade and manufacturing route; cast, sintered and graphite-plugged bushings are not automatic substitutes.
Match the lubrication route to the assembly. Hub ports, pin passages, bushing holes and grooves must align after installation. Specify their locations. Check pin wear, finish and coatings; a new bushing cannot repair a damaged pin.
Grease distribution is especially easy to misread from a loose part: a hole through the bronze is useful only if it meets the feed in the assembled hub or pin. Ask the equipment team to confirm whether the drawing requires periodic greasing, an impregnated material or another approved lubrication arrangement.
What Data Are Needed to Quote a Custom Sheave Bushing?
Send a bushing drawing and the relevant assembly section. The sheave part number helps identification but may not define a replacement sleeve’s interfaces. Separate bushing dimensions from wheel specifications.
For the bushing, identify:
- Material grade; ID, OD, length, wall thickness and tolerances.
- Flange, shoulder, chamfer, relief and retention details, if present.
- Oil holes, grooves and their angular position relative to the hub or pin feed.
- Whether the ID is finished before fitting or after installation.
- Drawing revision, inspection points and quantity per sheave.
For the mating parts, provide the hub bore size and material, pin diameter and condition, and washers or spacers affecting axial position. State OD seating fit and installed ID running clearance separately. On worn equipment, measure the hub and pin at several points; do not use a worn sleeve as the sole target dimension.
If a pressed-in sleeve is supplied with machining allowance, specify who will finish the bore and where the final dimension is inspected. Otherwise, the supplier may inspect the loose sleeve while the buyer expects the same ID after assembly. Include the relevant datum for any concentricity requirement.
For application review, include sheave diameter, rope size, hub width, line pull, rope angle, speed, duty cycle and environment. These can help resolve an unclear material or lubrication specification; a bushing quote does not certify the complete sheave.
Mark unusual flanges and oil paths on a section view. Define how the installed bore and groove alignment will be checked.
Request a Quote for Custom Crane Sheave Bushings
JEDBUSHING manufactures custom bronze parts to approved drawings, including sleeves, flanged bushings and specified oil features. We can review geometry, material, quantity and inspection scope for a B2B quote.
Send the bushing drawing, assembly section, pin and hub dimensions, and quantities. Mark unconfirmed measurements so the manufacturing specification can be agreed before production.
Send your crane sheave bushing drawings for a quote.
Frequently Asked Questions
Can you quote the bronze bushings without supplying complete sheaves?
Yes. Identify the bronze bushing as a separate line item and provide its drawing and quantity. List any other requested components separately so the scope of supply is clear.
Can bushings for several sheave models be included in one inquiry?
Yes. Assign a drawing revision, material and quantity to each part number. Include your initial order and expected repeat demand if you want the order mix considered during quotation.
Are thrust washers, spacers and seals included automatically?
No. Specify each required item and its drawing or dimensions. We will confirm which components are included in the quotation before production.
Which material and dimensional records can be requested?
State the material certificate and inspection report you require in the RFQ. Mark critical dimensions and the drawing revision; the available records and reporting format can then be agreed with the order.