Short hollow pipe pins are compact open tubes used as small sleeves, spacers or pivot bodies. The gallery shows short sections with a visible bore, including single parts and dense bulk views. Their short length makes them useful in tight assemblies, but it also means the end condition and wall thickness are proportionally more important than they are on a long pin.
Compact tube geometry
The gallery shows parts at different angles and in bulk. The close-ups help confirm that the bore is open, but they do not establish the wall tolerance or the end squareness. Those details should be measured on a sample.
Small sleeves and pivot parts
Short pipe pins can be considered for small hinges, spacers, linkage sleeves, pivot bushes and compact tubular assemblies. The application should identify whether the part rotates, stays fixed, or simply establishes a gap. A short sleeve used as a spacer needs a controlled length; a pivot sleeve needs a controlled bore and end condition.
If the part is installed in a blind hole, confirm that the bore is not expected to vent or pass a pin through the full assembly. A short hollow part can trap debris or liquid if the design does not provide a path. Discuss the cleaning and assembly sequence when the bore is functional.
Handling a high-volume small part
The bulk views show many small parts, which makes handling and sorting part of the specification. Ask how the parts will be packed, whether they can tangle, and how the bore will be kept clear. Short tubes can nest or bridge in feeding equipment, especially when the wall is thin.
The photograph cannot show whether every part has the same bore or whether some ends are burred. Sample from several areas of the container and inspect the bore under suitable magnification. If the parts are plated, confirm that the coating has not closed the bore or rounded a critical edge.
How to specify a short hollow pipe pin
- Dimension the outside diameter, bore diameter, wall thickness and length.
- Show the end form, chamfer, squareness and bore finish.
- State the mating shaft, hole fit, retention method and available clearance.
- Provide the material, finish, packing method and inspection requirements.
Inspection and trial assembly
Check both ends for burrs and confirm that the bore is open. Measure the length at several points if the part is used as a spacer. Verify that the outside diameter fits the intended hole without excessive play. For a moving application, inspect the bore for scoring after a trial run.
Assemble the pin with the actual mating parts. Confirm that it seats squarely and that the joined components do not bind. If the pin is visible, check the end finish and appearance. Keep the trial sample with the assembly so future lots can be compared in the same conditions.
FAQ
Is the bore always open through the part?
The gallery shows an open bore, but the drawing should confirm whether it is through or blind and what diameter is required.
Can a short pipe pin be used as a spacer?
Yes, if the length and end squareness suit the gap. Confirm the clamping surfaces and the tolerance on the overall length.
How should the parts be packed?
The packing should prevent tangling and protect the ends and bore. Specify the handling method if the parts will be fed automatically.
Browse the pipe pin category, or compare long hollow pipe pins and copper hollow rivets.
