The 6836‑2RS is a thin‑section single‑row deep‑groove ball bearing with double rubber seals (2RS). It combines compact cross‑section with sealing and is commonly offered by major manufacturers and distributors in a range of precision and clearance options.
Standard dimensions & common data
| Parameter | Value |
|---|---|
| Bore (d) | 180 mm |
| Outer diameter (D) | 225 mm |
| Width (B) | 22 mm |
| Seal / Shield | 2RS — rubber seals both sides (prevents dust & retains grease) |
| Weight (approx.) | ~1.73–1.78 kg (varies by cage and material) |
Sources: distributor & OEM catalogs reporting 180×225×22 mm as the standard 6836 size.
What “2RS” means — sealing and performance
2RS indicates rubber seals fitted on both sides of the bearing. These seals significantly reduce ingress of dust and moisture and are factory‑lubricated for maintenance‑free operation in many applications. Note that rubber seals increase friction slightly compared with metal shields but offer better protection in contaminated environments.
Thin‑section / narrow profile benefits
6836 (and sometimes sold as 61836 / 6836 thin‑section family) is a narrow/thin‑section design offering excellent space efficiency and good rotational characteristics when axial space is limited. These thin bearings are commonly used where weight and radial envelope must be minimized.
Load ratings & limiting speeds — catalogue examples
Catalog values vary by manufacturer, precision class, cage material and lubrication. For example, some distributors list basic dynamic and static load ratings and limiting speeds for sealed thin versions; sample values are shown in product listings and should be validated with the supplier for your batch and lubrication choice.
Precision & clearance options
6836 bearings are commonly available in multiple precision grades (P0/P6/P5/P4, ABEC equivalents) and radial internal clearances (CN / C2 / C3 / C4). Choose clearance/precision based on temperature, speed and load to avoid pre‑load or excessive play during operation.
Typical applications
Electric motors and generators (where space is limited)
Light to medium industrial machinery
Machine tools & spindle supports (thin sections in compact designs)
Pumps, blowers and fans
Conveyors and material handling components
Application examples and product positioning from distributor/OEM listings.
Variants & equivalents
Common suffixes and equivalents you may see in catalogs:
6836 — open (no seal/shield)
6836‑2RS — double rubber sealed
6836‑ZZ / 61836‑ZZ — metal shielded variants
61836 / 6836 MA / 61836 MA/C3 — alternate numbering used by thin‑section product families from some vendors
Mounting & tolerance recommendations (practical tips)
1. Design shaft and housing fits per ISO/Tolerances — typical: shaft h6 / housing H7 for interference/locational fits. Confirm with engineering drawings.
2. When using 2RS sealed bearings, allow for the seal thickness when designing axial clearances and covers.
3. For high‑speed rotating assemblies, select the correct grease and consider oil lubrication for extended life if speeds approach limiting RPM.
4. Preload only when required — thin bearings are sensitive to excessive preload which reduces life.
5. When replacing bearings, always inspect shaft and housing for fretting/corrosion and clean/replace as required to ensure proper seating.
Lubrication guidance
Sealed 2RS bearings are normally factory pre‑lubricated. For extended life or special environments (high temperature, food contact), request specific grease grades (low temperature, high temperature, food‑grade NSF H1) from Rimao during RFQ. For oil lubrication, ensure seals and ventilation are compatible.
Testing, quality & traceability
Rimao implements incoming material checks, dimensional inspection, raceway geometry control and batch runout/noise testing for bearings. We can provide batch inspection reports and can arrange 3rd‑party testing on request for critical projects.
Selection & comparison chart
| Model | Sealing | Best for |
|---|---|---|
| 6836 (open) | — | Lowest friction, external lubrication |
| 6836‑ZZ | metal shield | Higher RPM, light contamination |
| 6836‑2RS | rubber seal (both sides) | Contaminated environments, maintenance‑free |
| 61836‑MA / 6836 MA/C3 | variant | Thin section with larger clearance (C3) for thermal growth |
Tip: If in doubt, share your application load, speed, temperature and environment with Rimao engineers for a tailored recommendation.
Ordering, customization & lead times
Rimao advantage: hundreds of ready molds to support fast sampling and scalable production. Typical services include:
Custom sealing (rubber compounds, FKM for high temp)
Precision grades (P0 to P4 / ABEC rating)
Clearance options (C0/CN, C2, C3, C4)
Special cage materials (steel, brass, polyamide upon request)
Pre‑lubrication choices and OEM packaging
Sample policy: small sample orders for evaluation; MOQ and lead time depend on material and finish — typical lead time for stocked variants is days, custom batches vary by qty (ask via RFQ).
FAQs
What's the difference between 6836 and 61836
Some vendors use the 61836 numbering as an alternate catalogue identifier for thin‑section products; always verify dimensions (180×225×22) to confirm equivalence.
What is the typical limiting speed for 6836‑2RS?
Limiting speeds depend on seal type, grease, cage material and lubrication. Some thin‑section sealed listings show conservative limiting speeds (e.g., a few thousand RPM), while other precision variants rated for higher RPM exist — validate with supplier datasheet for your configuration.
Can Rimao provide ABEC/EMQ / high‑precision versions?
Yes — Rimao supplies a range of precision grades from standard to ABEC/EMQ levels on request. Share the application requirements for a custom quote.
