Custom bushings, sleeves and rings to drawing

DRAWING-BASED PROCUREMENT

Updated 2026-10-28

Select the component by its locating and contact interfaces

A sleeve, bushing or ring may locate on its bore, its outside diameter, a shoulder or a combination of these surfaces. Begin the supplier enquiry by naming the relationship that controls your assembly. Show the mating shaft or housing and identify which surfaces guide, retain, space or seat the component. This provides a practical way to choose a related catalogue form and turn it into a defined machining brief.

Chengshuo references in this family include brass sleeve forms, aluminum round washers and brass components with bores and seating shoulders. Their original product material identifies those materials for the specific examples. Use the relevant reference page to communicate the geometry you require, then specify your own alloy grade, dimensions and final condition. Keep alternative materials or shapes as separately identified quotation options so that purchasing can compare an agreed scope.

Define what is supplied as part of the component order. A loose sleeve, a matched set and an installed assembly can require different documentation and acceptance steps. Identify any mating parts or fixtures supplied by the buyer, and name the reviewer responsible for fit or assembly approval. The machining quotation can then describe the requested component and records while explicitly identifying any additional, separately agreed assembly work.

Specify the bore, outside fit and faces as one drawing system

Locate the internal and external surfaces in the drawing datum system and state the required relationship to the locating face. Define usable contact lengths, shoulders, steps and reliefs separately from entry chamfers. Include a section where the internal form or a thin wall needs explanation. A controlled mating-part reference helps the reviewer understand which feature is intended to move, locate or remain retained during the agreed assembly process.

Call out the material grade, treatment and delivered condition before agreeing the final inspection requirements. Where a finish or coating affects a mating feature, identify the dimensions that apply after that operation and any area to be masked or protected. Define important edges and the surfaces on which handling marks matter. An inspection requirement should refer to the actual feature and condition, rather than relying on a broad precision-part description.

For a component whose assembly or clamping condition matters, describe both the condition supplied for inspection and the agreed condition used for fit review. Identify the support or fixture where it is part of the check. Ask for a proposal when access to a bore, groove or internal shoulder makes verification difficult. Agree which characteristics will be reported on the samples and keep that method with the controlled drawing.

Agree sample records and preserve the repeat-supply definition

Send Chengshuo the part drawing, relevant mating geometry, material specification, sample quantity and production scenarios. Highlight the bore, outside interface, locating face and any critical internal feature. List the requested dimensional report, material documentation and other records needed for your purchasing decision. Give the required timing and identify any unresolved interface decision so that the quotation can state its scope and assumptions clearly.

Before sample manufacture, identify the drawing revision, delivered condition and acceptance checks. Keep the measured results, sample identifiers and agreed assembly decision together. If a sample leads to a change in fit, shoulder position, material or finish, issue a controlled update and determine which checks need another review. The commercial offer confirms the selected supply boundary, documentation and timing for that specific technical package.

For production and repeat orders, protect bores, edges and locating faces using the agreed packing arrangement. Define the part and lot identity that receiving should retain after unpacking. Compare the component and its mating parts with the approved sample basis before releasing another order. A changed shaft, housing or finishing operation should be identified for review even if the sleeve or ring retains the same purchasing description.

Related parts and drawing resources

• Brass sleeve reference
• Aluminum washer reference
• Brass bore-and-shoulder reference
• Review shaft and bushing fits
• Prepare the drawing enquiry

Request a drawing review

Prepare your supplier enquiry

Questions before placing the order