61804 2rs 20mm x 32mm deep groove ball bearings deliver slim 20×32×7 mm geometry for compact applications that still need high-speed rotation with low friction, low noise, and low vibration. The double sealed 2RS layout suits electric motors, handheld tools, and tight housings where every millimeter of thickness counts.
ISO 61804-2rs 20mm x 32mm deep groove ball bearings (6804-2RS equivalent) pairs a standard cage with normal clearance and factory grease for precision duty. For broader 2RS OEM programs, compare our OEM sealed deep groove ball bearings line — this page covers the exact 61804 2rs 20mm x 32mm deep groove ball bearings metric SKU.
61804 2RS 20mm x 32mm Deep Groove Ball Bearings — Overview & 20×32×7 Dimensions
Thin-section 61804 2rs 20mm x 32mm deep groove ball bearings combine a high performance-to-weight ratio with smooth rotation in space-limited layouts.
Understanding the Dimensions: 20×32×7 mm
The standout characteristic is an ultra-slim profile in the thin-section deep groove ball bearing family.
| Dimension Type | Measurement | Description |
|---|---|---|
| Inner diameter (bore) | 20 mm | Fits a 20 mm shaft |
| Outer diameter (OD) | 32 mm | Fits a 32 mm housing bore |
| Thickness (width) | 7 mm | Ultra-slim profile for space-saving layouts |
What Does the 61804 2RS Code Mean?
Understanding the nomenclature helps select the exact part for machinery or equipment:
- 61804 (or 6804): Thin-section metric series with 20 mm inner diameter.
- 2RS: Double sealed bearing with dual rubber seals on both sides to keep lubrication in and contaminants out.
Key Design Features of Thin Section Bearings
Chrome steel construction meets strict precision standards for industrial reliability.
- Slim profile: Reduced cross-section saves weight without sacrificing radial load capacity.
- Pre-lubricated: Factory-packed grease for immediate installation.
- High efficiency: Standard cage and normal clearance support low noise, low vibration, and minimal friction torque.
61804 2RS 20mm x 32mm Deep Groove Ball Bearings — Technical Specifications
Exact specs matter for high-precision or tight-space projects. Direct technical breakdown for this 20×32×7 mm ball bearing:
Dimensions and Tolerances
This thin-section deep groove ball bearing targets compact applications requiring accurate fits.
| Metric Feature | Measurement | Specification Type |
|---|---|---|
| Inner diameter (bore) | 20 mm | Normal clearance |
| Outer diameter (OD) | 32 mm | Precision ground |
| Thickness (width) | 7 mm | Slim profile |
| Material | Chrome steel | High durability |
| Cage type | Standard cage | Guided steel |
Load Ratings: Dynamic vs Static Load Capacities
Despite the slim profile, these bearings handle essential radial workloads efficiently.
- Dynamic load capacity (C): 2.70 kN — suited to forces during high-speed rotation.
- Static load capacity (C0): 1.97 kN — resists permanent deformation under stationary loads.
- Load type: Primarily radial with light axial capability.
Max Speed Limits with Rubber Seals
The double sealed design limits top speed versus open variants due to seal contact friction.
- Limiting speed (grease): 14,000 RPM
- Lubrication: Factory pre-lubricated with high-speed grease
- Performance: Low friction, low noise, and low vibration operation
Why the 2RS Rubber Seals Matter
In gritty environments, the sealing mechanism defines bearing lifespan. 61804 2rs 20mm x 32mm deep groove ball bearings use contact rubber seals where open or shielded types fail.
How Dual Rubber Seals Prevent Contamination
The 2RS designation means synthetic rubber seals on both sides, pressed against the inner ring.
- Total blockade: Barrier against dust, dirt, moisture, and trail grime.
- Extended lifespan: Keeps abrasive particles out of raceways to prevent pitting.
Grease Retention and Self-Lubrication Benefits
Rubber sealed ball bearings ship fully pre-lubricated — no packing grease at install, no routine maintenance.
- Locked-in lubrication: Dual seals keep factory grease on balls and raceways.
- Zero leakage: Even during high-speed rotation, grease stays inside for continuous low friction and low noise.
Comparing 2RS (Rubber Seals) vs. ZZ (Metal Shields)
Choosing between double sealed and shielded variants depends on the operating environment. See also sealed deep groove ball bearings for broader seal-type programs.
| Feature | 2RS (Rubber Seals) | ZZ (Metal Shields) |
|---|---|---|
| Contact type | Continuous contact (seals touch inner ring) | Non-contact gap |
| Dust protection | Excellent (fine dust and powder) | Good (large debris only) |
| Moisture resistance | High (splashes and humidity) | Poor |
| Friction level | Slight initial drag | Extremely low friction |
| Best for | Outdoor electric motors, tools, exposed hubs | Clean indoor automation |
Common Applications and Uses
61804 2rs 20mm x 32mm deep groove ball bearings serve high-performance industries where slim profiles and smooth rotation are mandatory.
Bicycle Hub Bearings and Bottom Brackets
The 20×32×7 mm size fits modern bicycle hub and bottom bracket envelopes.
- Contamination defense: Double sealed design blocks mud, water, and road grit.
- Smooth performance: Low friction and low noise for seamless rotation.
- Perfect fit: 20 mm bore and 32 mm OD match standard high-end spindles.
RC Models, Drones, and Robotics
Every gram counts in hobby and aerospace builds. This thin-section bearing balances weight reduction and precision.
- Compact applications: Tight robotic joints and drone motor mounts.
- High-speed rotation: Handles rapid RPM from brushless RC motors.
- Pre-lubricated: Ready to install with zero maintenance.
Electric Motors and Power Tools
Chrome steel units supply lightweight electric motors and handheld tools.
- Low vibration: Smooth handheld operation without user fatigue.
- Radial load capacity: Manages everyday motorized appliance forces.
- Normal clearance: Standard cage design for steady workloads.
Performance Benefits of Thin-Section Bearings
61804 2rs 20mm x 32mm deep groove ball bearings maximize performance in the smallest footprint.
Space-Saving Design for Compact Layouts
With 20 mm bore, 32 mm OD, and 7 mm thickness, housing size shrinks without reducing shaft diameter.
Weight Reduction and Smooth Rotation
Lower mass helps drones, power tools, and hubs where rotational weight affects handling.
Low Friction Torque for High Efficiency
Smaller rolling elements lower startup and running torque. The standard cage maintains ball alignment for low noise, low vibration, and efficient high-speed rotation.
Performance Summary: 20×32×7 mm Ball Bearing
| Feature | Engineering Benefit | Real-World Advantage |
|---|---|---|
| Slim profile (7 mm width) | Reduces housing space | Sleek, compact applications |
| Reduced mass | Lowers rotational weight | Better battery and agility |
| Optimized raceway | Low friction torque | Less heat and energy loss |
| Double sealed (2RS) | Seals grease, blocks dirt | Maintenance-free lifespan |
How to Choose and Install Your Bearing
Longest life from 61804 2rs 20mm x 32mm deep groove ball bearings depends on precise fitment and careful handling. Thin-section types absorb less installation abuse than standard-width units.
Checking Shaft and Housing Tolerances
Verify mounting surfaces with calipers before press-fitting the 20×32×7 mm bearing.
| Component | Target fit type | Common application |
|---|---|---|
| Shaft (inner ring) | Light press / interference | Rotating shafts |
| Housing bore (outer ring) | Slip / transition | Stationary housings |
Proper Installation Tools Avoid Premature Failure
Never strike the bearing directly or press on the wrong ring — that causes brinelling and noisy operation.
- Use a bearing press: Driver sleeve matching the ring being fitted.
- Press the correct ring: Inner ring on shafts; outer ring in housings.
- Cleanliness: Remove dirt, burrs, and old grease before install.
Signs It’s Time to Replace Your 61804 2RS Bearing
- Gritty feeling: Rough spin by hand instead of smooth rotation.
- Audible noise: Whining or clicking during high-speed rotation.
- Excessive play: Visible shaft movement.
- Leaking grease: Staining around the double sealed rubber lip.
Frequently Asked Questions (FAQs)
Can I remove the seals to clean and re-grease the bearing?
Seals can be carefully removed for cleaning and repacking, but factory grease is optimized for 61804 2rs 20mm x 32mm deep groove ball bearings. Repeated removal can deform rubber lips and reduce sealing efficiency.
What is the difference between 61804-2RS and 6804-2RS?
No dimensional difference — two names for the same 20×32×7 mm part.
61804-2RS follows ISO numbering.
6804-2RS is common marketing shorthand.
Both use 20 mm inner diameter, 32 mm OD, and 7 mm thickness.
How much load can a 20 mm x 32 mm x 7 mm bearing handle?
Thin-section geometry prioritizes weight savings in compact applications. Load capacity is lower than standard-thickness bearings despite excellent high-speed rotation performance.
| Load type | Capacity rating (typical) |
|---|---|
| Dynamic load capacity | ~2.7 kN |
| Static load | ~1.97 kN |
Are these bearings water-resistant?
Double sealed chrome steel units resist splashes, dust, and mud in outdoor tools and hubs. They are not fully waterproof — avoid submersion or high-pressure washing that forces moisture past rubber lips.
How does 61804 compare to other thin metric bores?
For adjacent sub-25 mm programs (e.g. 22×39×9 mm), see deep groove ball bearings 69 22 — do not confuse ISO 61804 with large 6922 thin-section sizes.
Ordering Information, MOQ & Wholesale Pricing
Factory-direct quotes for 61804 2rs 20mm x 32mm deep groove ball bearings cover bulk 2RS stock, custom clearance, and OEM packaging.
| Program | MOQ | Lead time |
|---|---|---|
| 61804-2RS stock (GCr15) | 500 pcs | 7–10 business days |
| C3 clearance / custom grease | 1,000 pcs | 10–15 business days |
| 10,000+ volume tier | 10,000 pcs | Quote + dedicated QC batch |
Request a Quote
Send expected volume, clearance class, and application (electric motors, tools, robotics) for a configured 61804 2rs 20mm x 32mm deep groove ball bearings proposal.
Contact JN Bearings with part number 61804-2RS / 6804-2RS, bore × OD × thickness, and target static load duty if replacing an existing unit.
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