Working conditions
Identify temperature, contact fluids and repeated movement.
Custom manufacturing example · Different sizes rubber bumper/NBR rubber washer for industrial use
CUSTOM RUBBER & SILICONE MANUFACTURING
Different sizes rubber bumper/NBR rubber washer for industrial use
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
An NBR rubber washer places a compliant ring between adjoining parts, offering a softer interface around a fastener or locating feature. The useful dimensions include the center hole, outside diameter and thickness; each affects how the washer sits and how much rubber is available to compress.
Choose the center opening to clear the intended fastener without allowing the washer to wander excessively. The surrounding faces should support the ring rather than leave a large portion hanging over an edge. Where a washer is used as a small bumper, consider the contact direction and available deflection instead of treating any ring of the right diameter as equivalent.
NBR material selection should reflect the fluids and temperatures actually present in the device. Tightening also needs attention: excessive compression can push rubber outward and reduce the intended separation between parts. Inspect the installed washer for uneven squeeze and contact with sharp threads. Replace a damaged ring with the intended thickness so the assembly spacing is not inadvertently changed during servicing.
- Material options
- Custom NBR formulation; tailor the geometry and color to the required interface and exposure.
- Hardness range
- 30–90 Shore A for rubber. Assess the grade against this fit requirement: The useful dimensions include the center hole, outside diameter and thickness; each affects how the washer sits and how much rubber is available to compress.
- Custom profile & fit
- Choose the center opening to clear the intended fastener without allowing the washer to wander excessively.
- Assembly considerations
- Inspect the installed washer for uneven squeeze and contact with sharp threads.
- Design check
- NBR material selection should reflect the fluids and temperatures actually present in the device.
Photos illustrate structure or material only. Where a washer is used as a small bumper, consider the contact direction and available deflection instead of treating any ring of the right diameter as equivalent. ETOL directly manufactures custom-shaped silicone and rubber parts to your requirements.
FIND THE RIGHT FIT
Rubber Feet Size Catalog
Choose hemispherical, tapered or recessed rubber feet and compare the mounting dimensions. All values are in millimeters. Use the drawing labels for each product; a dash marks a dimension not supplied in the source.
Recessed Rubber Feet
12 sizes for recessed rubber feet, including flat and rounded bases. The Base column identifies the lower-edge style. C is recess depth; the appearance rendering shows a rounded-base example.
DIMENSION GUIDE
PRODUCT APPEARANCE
| P/N | OD | H | A | B | C | Base | Unit |
|---|---|---|---|---|---|---|---|
| RBB7810 | 19 | 7.2 | 4.8 | 9.6 | 3.2 | Flat | mm |
| RBB7809 | 19 | 9.5 | 3.17 | 9.5 | 4 | Flat | mm |
| RBB7811 | 24 | 11 | 6 | 12 | 6 | Flat | mm |
| RBB7812 | 26.5 | 13 | 4.7 | 9.5 | 5 | Flat | mm |
| RBB7813 | 37 | 15 | 6 | 12 | 8 | Flat | mm |
| RBB7818 | 12.7 | 6.35 | 3.1 | 6.35 | 4 | Rounded | mm |
| RBB7817 | 26.5 | 21 | 4.7 | 9.5 | 11 | Rounded | mm |
| RBB7819 | 38 | 38 | 6 | 19 | 9.5 | Rounded | mm |
| RBB7820 | 38 | 38 | 6.5 | 19.5 | 9.5 | Rounded | mm |
| RBB7821 | 41 | 18 | 8.3 | 9.5 | 6 | Rounded | mm |
| RBB2101 | 12.7 | 9.53 | 3.97 | 7.94 | 4 | Rounded | mm |
| RBB2102 | 15 | 4 | 3 | 6 | 2 | Rounded | mm |
Tapered Rubber Feet
83 sizes for tapered rubber feet. C is recess depth and D is bottom outside diameter. A dash means that dimension was not supplied; match all available dimensions before selecting a size.
DIMENSION GUIDE
PRODUCT APPEARANCE
| P/N | OD | H | A | B | C | D | Unit |
|---|---|---|---|---|---|---|---|
| RBA7801 | 12 | 7 | 3 | 6 | 5.4 | — | mm |
| RBA7826 | 15.88 | 12.7 | 3.97 | 7.94 | 6.35 | — | mm |
| RBA7827 | 19.05 | 14.29 | 4.76 | 9.53 | 6.35 | — | mm |
| RBA7828 | 22.23 | 12.7 | 4.76 | 9.53 | 10.32 | — | mm |
| RBA7829 | 23.81 | 15.88 | 5.56 | 11.11 | 11.11 | — | mm |
| RBA7802 | 24 | 16 | 6 | 12 | 8 | — | mm |
| RBA7803 | 25 | 15 | 4 | 6 | 6 | — | mm |
| RBA7830 | 26.99 | 21.43 | 4.76 | 9.53 | 11.11 | — | mm |
| RBA7805 | 34 | 19 | 4.5 | 9 | 9 | — | mm |
| RBA7808 | 38 | 22.5 | 5 | 12 | 13 | — | mm |
| RBA7806 | 38 | 24 | 5 | 12 | 13 | — | mm |
| RBA7807 | 38 | 30 | 5.5 | 12 | 19 | — | mm |
| RBA1001 | 10.5 | 4 | 3 | 6 | — | 9 | mm |
| RBA1002 | 11 | 6 | 3 | 6 | — | 9 | mm |
| RBA1005 | 12 | 9 | 3 | 6 | — | 8 | mm |
Hemispherical Rubber Bumpers
5 sizes with a curved outer profile and recessed mounting hole. C is the recess depth.
DIMENSION GUIDE
PRODUCT APPEARANCE
| P/N | OD | H | A | B | C | Unit |
|---|---|---|---|---|---|---|
| RBD7822 | 15 | 4.5 | 3.75 | 6.7 | 2 | mm |
| RBD7823 | 23.7 | 10 | 4 | 7 | 7 | mm |
| RBD7825 | 30 | 12 | 8 | 10 | 6 | mm |
| RBD7824 | 30 | 16 | 8 | 10 | 10 | mm |
| RBD4105 | 41 | 18 | 8.3 | 9.5 | 6 | mm |
Can't find the right size? Contact us for custom dimensions tailored 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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