Working conditions
Identify temperature, contact fluids and repeated movement.
Custom manufacturing example · Oil-proof Buna-N rubber thick washer/sealing gaskets
CUSTOM RUBBER & SILICONE MANUFACTURING
Oil-proof Buna-N rubber thick washer/sealing gaskets
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
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
A Buna-N rubber thick washer provides a compliant ring for a defined contact or sealing arrangement. Buna-N identifies an NBR material family, but the selected formulation must still suit the actual oil and operating conditions. An oil-proof label is not a universal specification for every lubricant or additive.
The thick section affects how the assembly closes and how much the rubber can deform. Check the inner and outer diameters with the available supporting faces, then define the intended installed compression. Tightening harder is not a substitute for choosing the correct geometry.
Evaluate any sealing requirement in the completed joint, including the relevant fluid and temperature. During fitting, keep the washer aligned so its bore is not dragged against a sharp thread. Inspect used parts for swelling, cuts and uneven flattening. If exposure has changed since the original installation, reconsider the compound before fitting another washer with the same appearance but without confirming its suitability for the current service.
- Material options
- NBR. Custom formulation and color for the intended contact conditions.
- Hardness selection
- Rubber: 30–90 Shore A. Check the inner and outer diameters with the available supporting faces, then define the intended installed compression.
- Custom dimensions
- During fitting, keep the washer aligned so its bore is not dragged against a sharp thread.
- Fit & assembly
- The thick section affects how the assembly closes and how much the rubber can deform.
- Use & inspection
- If exposure has changed since the original installation, reconsider the compound before fitting another washer with the same appearance but without confirming its suitability for the current service.
Photos illustrate structure or material only. A Buna-N rubber thick washer provides a compliant ring for a defined contact or sealing arrangement. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.
From part requirements to production
01
Define the part
Identify key dimensions, mating surfaces and quantity
02
Review material & tooling
Agree the compound and manufacturing approach
03
Evaluate the sample
Review the fit and agreed requirements in the assembly
04
Produce & inspect
Manufacture and check against the approved requirements
Review the intended assembly
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.
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