A sealing ring is a rubber or metal-cased ring fitted at the open face of a bearing to keep grease inside and stop dust, water, and dirt from getting in. It keeps a bearing running smoothly for a much longer time, especially in dusty or wet working conditions.
Shree Balaji Export supplies sealing rings as both a standalone spare part and as a fitted feature on the bearings we manufacture. Our rubber compounds are chosen to match each customer's working condition, whether that means resisting heat, chemicals, water spray, or plain heavy dust, and every batch is checked for lip tension and fit before dispatch. Our regular buyers span Sri Lanka, South Africa, the UAE, Nigeria, Egypt, Indonesia, Thailand, and Kuwait, and our team handles the export paperwork so the shipment clears customs without delay on your side. Head over to Shree Balaji Export to browse our seal and bearing catalogue or send us your enquiry.
Product Specifications
| Part Number | 8113303 |
|---|---|
| Material | Sealing Ring Material* |
| Color | Black |
| Outer Diameter | 23 mm* |
| Shape | Circular / Ring |
| Weight | Not specified |
| Configuration | Sealing Ring |
| Size | 23 mm |
| Type | Sealing Ring |
| Thread / Connection | PG 11 / NPT 3/8 |
What Is a Sealing Ring?
A sealing ring is a thin ring, usually made of rubber bonded to a metal frame, that sits at the open end of a bearing or housing. Its job is simple but important: keep the grease locked inside the bearing and keep outside dirt, dust, and moisture from getting in and mixing with that grease.
Most sealing rings work using a flexible lip that presses lightly against the rotating shaft or inner ring. This light contact is enough to block dirt without adding too much drag, so the bearing still spins freely and does not run hot from extra friction.
Sealing rings come in different rubber types for different jobs. A standard nitrile rubber (NBR) ring works fine for normal temperatures, while a Viton or FKM ring is used where heat is high, and a PTFE ring is chosen when the bearing is exposed to chemicals or solvents.
Sealing Ring vs Shield: What Is the Difference?
A shield is a thin metal disc that covers the bearing opening without touching the inner ring, so it keeps out large dirt particles but still lets fine dust and moisture pass through the small gap. A sealing ring, because its rubber lip makes light contact with the shaft, blocks dust and moisture far more effectively. A shielded bearing suits clean indoor use, while a sealed bearing with a proper sealing ring is the better choice for outdoor, wet, or dusty industrial work.
Types of Sealing Rings
- Single-Lip Sealing Ring: This basic type has one rubber lip and gives good, low-friction protection for normal indoor machines and light-duty equipment.
- Double-Lip Sealing Ring: A second lip adds extra protection against dust and splashing water, making it a common choice for outdoor equipment and off-road vehicles.
- Contact-Type Sealing Ring: The lip presses firmly against the shaft for maximum protection, though it adds a small amount of running friction. It suits very dirty or wet sites.
- Non-Contact Sealing Ring: Here the lip sits very close to the shaft but does not touch it, giving lower friction and cooler running, useful for high-speed machines with a cleaner environment.
Sealing Ring: Part Numbers, Sizes & Applications
The table below shows common sealing ring sizes and rubber types along with where each is generally used. Send us your bearing size and working condition, and our team will confirm the correct match.
| Part Number | Inner Dia. (mm) | Outer Dia. (mm) | Thickness (mm) | Sealing Ring Type | Typical Application |
|---|---|---|---|---|---|
| SR 6203 RS | 17 | 40 | 6 | Sealing Ring (single-lip rubber, metal case) | Electric motor drive-end bearing |
| SR 6905 2RS | 25 | 42 | 5 | Sealing Ring (double-lip rubber) | Bicycle and e-bike hub bearing |
| SR 30205 TC | 25 | 52 | 4 | Sealing Ring (contact type, oil seal) | Gearbox input shaft housing |
| SR NBR 45x65x8 | 45 | 65 | 8 | Sealing Ring (NBR rubber, non-contact) | Agricultural implement axle housing |
| SR FKM 60x80x10 | 60 | 80 | 10 | Sealing Ring (Viton/FKM, high heat) | Furnace fan and hot-air blower shaft |
| SR PTFE 80x100x10 | 80 | 100 | 10 | Sealing Ring (PTFE lip, chemical duty) | Pump shaft in chemical processing line |
Benefits of Choosing the Right Sealing Ring
<- Keeps Grease Where It Belongs: A good seal stops grease from leaking out, so the bearing stays lubricated for longer.
- Blocks Dust, Water, and Dirt: The rubber lip stops outside contamination from reaching the rollers and raceway.
- Reduces Unplanned Downtime: Fewer contamination-related failures mean fewer surprise machine stoppages.
- Available for Every Condition: Different rubber compounds handle heat, chemicals, water, and everyday dust.
- Low Extra Friction: A well-designed lip protects the bearing without noticeably slowing it down.
- Cost-Effective Protection:+ A small sealing ring is far cheaper to replace than a damaged bearing.
Sealing Ring Performance Across Our Export Regions
The working conditions in each of our export markets decide which sealing ring compound and design perform best. Here is a quick look at what matters most, country by country:
| Export Market | Why Sealing Rings Matter There |
|---|---|
| Sri Lanka | Coconut and rubber processing lines run in humid, wet sheds, so a good sealing ring is what keeps grease from washing out of the bearing. |
| South Africa | Open-pit mining conveyors throw up fine rock dust all day, and a worn seal is usually the first reason a bearing fails there. |
| UAE | Desert sand is extremely fine, and machinery left outdoors on construction sites needs a tight seal to stop it from reaching the rollers. |
| Nigeria | Farm equipment and small manufacturing units often run without regular maintenance, so a strong seal buys extra time between grease top-ups. |
| Egypt | Cement and sugar factories generate heavy airborne dust, making a reliable sealing ring essential to protect bearing raceways. |
| Indonesia | High humidity and frequent rain in palm oil and forestry operations call for seals that resist water ingress as much as dust. |
| Thailand | Food and rubber processing plants wash down their machines often, so seals must block both water spray and cleaning chemicals. |
| Kuwait | Oil and gas support equipment runs in high heat, so heat-resistant sealing compounds are needed to avoid the rubber going hard and cracking. |
| Worldwide | Any bearing working outdoors, in wet areas, or around dust and grit benefits from the right sealing ring to extend its working life. |
How to Select the Right Sealing Ring
- Identify the Contamination Type: Decide if dust, water, chemicals, or a mix of these is the main concern at your site.
- Check the Working Temperature: High heat needs a Viton or silicone compound instead of standard rubber.
- Match Inner and Outer Diameter: The seal must fit the bearing bore and housing exactly to seal properly.
- Consider Shaft Speed: Very high speed may call for a non-contact design to avoid extra heat build-up.
Common Mistakes to Avoid When Choosing a Sealing Ring
- Using the Wrong Rubber Compound: A standard rubber seal can turn hard and crack quickly in high heat or oil exposure.
- Forcing a Tight or Loose Fit: A seal that does not match the housing size can twist, leak, or fall out during running.
- Ignoring Shaft Surface Condition: A scratched or rusty shaft surface wears out even a good sealing ring fast.
- Choosing Contact Type for High Speed: This can cause the lip to overheat and wear out well before its expected life.
Simple Maintenance Tips for Longer Life
Wipe down the area around the seal during routine inspection, and look for grease stains that hint at a leaking lip. Replace a sealing ring the moment it looks cracked, hardened, or torn, since a failing seal lets dirt in long before the bearing itself shows any damage. Store spare sealing rings away from direct sunlight and heat, as rubber can dry out and lose its flexibility even before it is fitted.
Get a quick export quote for sealing rings from Shree Balaji Export — dependable delivery to Sri Lanka, South Africa, UAE, Nigeria, Egypt, Indonesia, Thailand, Kuwait and worldwide.
Frequently Asked Questions
It is fitted on a bearing to hold grease inside and stop dust, water, and dirt from entering, which helps the bearing run smoothly for a longer time.
A sealing ring uses a rubber lip that touches the shaft for strong protection, while a shield is a metal cover with a small gap that only blocks larger dirt particles.
A Viton or FKM sealing ring is generally the right choice for high-temperature duty, since standard rubber compounds can harden and crack under continuous heat.
In many open or separate-seal designs, yes, but in sealed bearings the seal is built in, so the complete bearing usually needs replacement once the seal fails.
Shree Balaji Export supplies sealing rings to Sri Lanka, South Africa, the UAE, Nigeria, Egypt, Indonesia, Thailand, Kuwait, and other markets worldwide, along with complete export documentation and dependable delivery.
Common signs include grease marks on the outside of the bearing housing, a hardened or cracked rubber lip, and dirt or moisture visible inside the bearing during inspection.
Shree Balaji ExportsSpecialize in delivering top-quality bearings and related solutions to meet the diverse needs of various industries.