Custom manufacturing example · Rubber end cap tips/ Protective rubber covers

CUSTOM RUBBER & SILICONE MANUFACTURING

Rubber end cap tips/ Protective rubber covers

A custom component for your assembly.

Define the mating surfaces, dimensions and working conditions. ETOL manufactures the part to the agreed design and material.

Factory direct
Made to order
Drawing & sample support

Share the part, its application and your estimated quantity.

Customize the fit, material and finish

Vulcanization workshop illustration with green molding presses and blue collection bins

Material & hardness

Selected for the contact, temperature and movement

Color & finish

Define the visible surfaces and intended color

Shape & dimensions

Develop holes, lips and walls around the mating parts

Mounting & fit

Match the attachment and installation method

Product Overview

Rubber end cap tips cover the ends of matching components with a removable protective layer. Their dimensions, material and color can be customized, with optional logos. For parts packed or stored together, the cap should remain on the end without introducing an awkward projection that catches neighboring items.

Check the cap's engagement when the component is lifted from its tray or packing position. Side contact can roll a loose rim even if the cap stays attached during a straight pull test. Match the internal contour to the end and allow the part to seat without folding the wall inward.

Keep the cap's inside clean before reuse, especially after unpacking. Debris lodged in the cavity can rub the covered surface during movement. Avoid storing loose caps under heavy objects that flatten their openings. Before putting a capped component back into service, remove the cover and inspect the end rather than assuming protection was continuous throughout storage. A cap with a stretched rim should be replaced so it does not detach unnoticed during the next handling step.

Material options: Custom rubber compound and color, selected for the contact conditions and required geometry.
Hardness range: 30–90 Shore A for rubber. Assess the grade against this fit requirement: Match the internal contour to the end and allow the part to seat without folding the wall inward.
Custom profile & fit: Their dimensions, material and color can be customized, with optional logos.
Assembly considerations: Check the cap's engagement when the component is lifted from its tray or packing position.
Design check: Before putting a capped component back into service, remove the cover and inspect the end rather than assuming protection was continuous throughout storage.

Photos illustrate structure or material only. Side contact can roll a loose rim even if the cap stays attached during a straight pull test. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.

Choosing a material or hardness? Explore the selection guide →

FIND THE RIGHT FIT

End Cap Size Catalog

Compare inside diameter A with the outside of the part being covered. Check inside depth C and overall dimensions B and D for available clearance. These RSE references show a round cap with one closed end.

RSE End Caps

43 closed-end cap sizes. A is the inside diameter and C is the usable internal depth; B and D describe the outside envelope.

Generated product visualization of RSE End Caps. — Illustrative product rendering. Refer to the table for dimensions.

P/N	A	B	C	D	Color	Unit
RSE3.7-7-9	3.7	7	9	11	black,white	mm
RSE4.7-8-9	4.7	8	9	11	black,white	mm
RSE5.7-9-10	5.7	9	10	12	black,white	mm
RSE6.7-10-10	6.7	10	10	12	black,white	mm
RSE7.7-11-11	7.7	11	11	13	black,white	mm
RSE8.7-12-12	8.7	12	12	14	black,white	mm
RSE9.7-14-13	9.7	14	13	15	black,white	mm
RSE10.7-15-14	10.7	15	14	16	black,white	mm
RSE11.7-16-15	11.7	16	15	17	black,white	mm
RSE12.7-17-15	12.7	17	15	18	black,white	mm
RSE13.7-18-15	13.7	18	15	18	black,white	mm
RSE14.7-19-15	14.7	19	15	18	black,white	mm
RSE15.7-20-16	15.7	20	16	19	black,white	mm
RSE16.7-21-16	16.7	21	16	19	black,white	mm
RSE17.7-22-16	17.7	22	16	19	black,white	mm

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.

From part requirements to production

Define the part

Identify key dimensions, mating surfaces and quantity

Review material & tooling

Agree the compound and manufacturing approach

Evaluate the sample

Review the fit and agreed requirements in the assembly

Produce & inspect

Manufacture and check against the approved requirements

Review the intended assembly

Working conditions

Identify temperature, contact fluids and repeated movement.

Material and structure

Consider hardness together with wall thickness and support.

Installation

Check access, mating dimensions and the fitting sequence.

Ordering this custom component

Can the shape be adjusted to my mating parts?

Yes. Show the receiving opening, contact surfaces and clearance limits. We can review the dimensions and retaining features around the intended fit.

Which details should be agreed before tooling?

Agree the critical dimensions, material, hardness, visible surfaces and sample requirements. Explain how the part is installed and which interfaces control its function.

Can a sample help define the replacement?

A sample can help explain the structure. Compare it with the assembly because wear, swelling or compression may have changed its original dimensions.

How is the quotation for this part determined?

The material, part geometry, tooling, quantity and finishing affect the quotation. Include the intended batch size and delivery destination when describing your requirements.

DISCUSS THIS COMPONENT

Describe the part you need.

Share the fit, operating conditions and quantity with our manufacturing team.