A photograph can show a split bushing's shape, but it rarely provides enough information to order a replacement or begin a custom part. Two similar-looking sleeves may differ in wall thickness, seam geometry or installed bore size. A useful enquiry describes both the component and the assembly it needs to fit.
This checklist covers the information to prepare when ordering custom split metal sleeve bushings from drawings or samples. It does not assign a standard size, material or load rating to the illustrated product.
1. Explain What the Bushing Needs to Do
Start with the application. Will the sleeve be pressed into a plastic hole? What passes through its bore? Does it need to stay in place during handling, and will it contact a moving component? Include the intended installation method if it has already been selected.
A split sleeve should not automatically be described as a bearing or a compression limiter. Those functions require their own design requirements and validation. If the part is intended to carry bolt clamping load, state that explicitly rather than assuming its appearance proves that capability.
2. Distinguish Free-State and Installed Dimensions
For a split component, distinguish measurements taken before installation from dimensions required after installation. A diameter on a drawing should make clear whether it describes the free-standing sleeve or the sleeve located in its mating hole.
Specify the outer diameter, inner diameter and axial length, with tolerances where known. Identify the dimensions that control assembly fit and agree how they will be inspected. Avoid squeezing an open sleeve with a measuring tool and treating the resulting reading as an unqualified free-state dimension.
- Outer diameter: state the required dimension and measurement condition.
- Inner diameter: identify the clearance needed for the mating component, particularly after installation.
- Axial length: confirm the seating position and whether the sleeve should be flush, recessed or protruding.
- Wall thickness: provide the specified thickness and identify any locations requiring particular attention.
3. Describe the Mating Plastic Part
For a press-fit application, provide the hole diameter and tolerance, engagement depth, hole entrance geometry and plastic material or grade where available. A section view showing the surrounding plastic can be more useful than a photograph of the sleeve alone.
Do not select a universal interference value from an unrelated product. The fit should be reviewed for the actual sleeve and host component, then checked using representative samples. Installation force, retention and possible damage to the plastic are separate points to assess.
4. Define the Split and Edge Requirements
The reference sample for this article has a straight open split. Other sleeve designs may have different seam profiles, but these should not be treated as interchangeable details. Show the required seam shape and specify any gap requirement together with its measurement condition.
Identify the insertion end and the edges that contact the plastic. State relevant burr and edge requirements instead of relying only on a general instruction such as "smooth finish." If the split must face a particular direction during installation, include that requirement in the assembly information.
5. Confirm Material and Surface Treatment
A silver appearance does not establish the metal grade or surface finish. Provide the material designation where known, and distinguish the base metal from any surface treatment. If either is undecided, mark it as an item for discussion.
Describe the operating environment and any cosmetic requirements. A polished photograph is not evidence of corrosion performance. Where a coating is specified, clarify whether critical fit dimensions apply before or after treatment.
A Practical Enquiry Checklist
| Information | What to Provide |
|---|---|
| Part reference | Drawing revision, physical sample or clear photographs from more than one side. |
| Dimensions | Outer diameter, inner diameter, axial length, wall thickness, relevant tolerances and measurement condition. |
| Seam and edges | Split profile, gap requirement and insertion-edge details. |
| Mating component | Hole dimensions, plastic grade, seating position and installation method. |
| Material and finish | Known specifications and any details still to be confirmed. |
| Quantity | Required sample quantity and expected production order quantity. |
| Acceptance requirements | Critical dimensional checks and any required assembly or functional tests. |
6. Approve Samples Against a Written Specification
Review more than appearance. Check the critical dimensions and try the sample in the intended mating component. Record the installation result, installed bore clearance and any edge or surface issues. Where a functional test is required, agree its method and acceptance criteria before making a performance claim.
Keep the approved drawing revision and sample reference together. Changes to the plastic hole, host material, sleeve finish or seam may require a new review rather than automatic reuse of an earlier approval.
What If You Do Not Have a Complete Drawing?
You can begin with sample photographs, the dimensions you know and a short description of the intended use. Mark unknown details clearly rather than guessing them. A physical sample or additional measurements may be needed before the final manufacturing specification is agreed.
A complete assembly drawing is not necessary just to start an enquiry. Clear information about the sleeve, its mating hole and the intended function provides a practical starting point.
Discuss Your Custom Split Bushing
SHANGERS accepts drawing- and sample-based enquiries for custom metal sleeve bushings. Send your part reference, known dimensions and required quantity. For installation into a plastic hole, include the hole dimensions and plastic material where available.
Image note: The article cover is an AI-assisted visual based on a supplied straight-split sleeve photograph, not an engineering drawing. Final product details follow the approved drawing or sample.
Further technical reading: SPIROL's post-mold compression limiter guidance provides an example of product-specific installation requirements. Its specifications do not describe or rate the SHANGERS sample.
