Sleeve vs Flanged Bushings: Custom Manufacturing & Drawing Checklist

Specify flange diameter, thickness, shoulder transition and relevant face requirements. A generous-looking flange can still be too thin for the actual load path or assembly handling. The design should consider corner clearance against the housing chamfer and whether a radius or relief is needed. Manufacturing should follow the approved geometry rather than remove an interfering corner without permission.

State which face is the axial datum and whether face runout or perpendicularity matters. Separate cosmetic finish from a functional contact surface. If flange thickness controls an assembly stack, show its permitted limits and the related mating dimensions. A general drawing tolerance may not describe the actual stack-up requirement.

Metal, Nylon, Delrin, PTFE and PEEK bushings have different application considerations. A polymer flange may need particular attention to sustained load and dimensional change. Nylon moisture condition, PTFE deformation and grade-specific wear behaviour should be reviewed where relevant. Neither the sleeve form nor the flange form makes an unsuitable material suitable.

Specify the approved material grade and mating shaft condition. Record lubrication, contamination, temperature and movement. Avoid assuming generic family names establish food, medical or electrical suitability. If a regulated application requires special documentation or qualification, confirm it independently rather than treating a dimensional inspection report as certification.

For a flanged design, list the components that contact each face and identify which dimension controls axial position. Compare the permitted flange thickness with the mating stack limits rather than judging only the nominal value. For a sleeve design, identify the shoulder or end feature that establishes the installed position. Confirm that neither design blocks assembly access or maintenance removal. If one alternative needs a separate retaining part, include that item in the comparison. Document the approved arrangement in the assembly drawing so a later purchaser does not select another shape solely from a similar bore diameter.