61801-2RS1/C3 Ultra Thin Wall Deep Groove Ball Bearing 12x21x5mm Double Rubber Seal C3 Clearance

1. Product Overview

61801-2RS1/C3 single row ultra-thin wall deep groove ball bearing, standard metric dimension 12×21×5mm.

Code Definition

• 618: Ultra thin lightweight thin-wall bearing series
• 01: Size code for 12mm inner bore
• 2RS1: Double-sided contact rubber lip seal, blocks dust, moisture and fine particles
• C3: Enlarged radial clearance to eliminate thermal expansion jamming at high speed

Super slim cross-section greatly saves radial installation space. Classic deep groove raceway bears radial load and light bidirectional axial load simultaneously. Double contact rubber seals lock internal grease and isolate external pollutants, pre-filled low-viscosity low-noise lithium grease. Widely used for miniature motors, precision testing instruments, small transmission parts and compact automation rotary components.

2. Technical Specifications

Drawings and high-speed low-noise durability test reports available on request.

3. Core Advantages

1. Ultra-thin lightweight design fits narrow space miniature equipment assembly
2. C3 oversized clearance avoids bearing seizure under long-time high-speed heating
3. Double 2RS1 contact rubber seals fully block dust, water mist and tiny abrasive debris
4. Mirror polished steel balls deliver ultra-low noise and smooth high-speed rotation
5. Universal deep groove structure bears radial and slight bidirectional axial loads
6. Standard unified metric dimensions for direct one-to-one aftermarket replacement
7. Light thin stamped steel cage reduces rotation friction torque
8. Customizable precision grade, high-temperature synthetic grease and outer ring laser marking

4. Application Scenarios

• Miniature high-speed micro motors, tiny cooling fans and blowers
• Precision testing instruments, optical equipment thin rotary assemblies
• Small handheld power tools and miniature textile transmission rollers
• Compact packaging automation and office precision machinery
• Medical miniature rotary parts and lightweight smart device transmission components

Suitable for OEM production and aftermarket maintenance of miniature precision light industrial equipment.

5. Why Choose GQZ Bearing

• 25 years specialized production of 618 ultra-thin wall series deep groove ball bearings including 61801-2RS1/C3 miniature precision models.
• Global unified standard dimensional standards, fully interchangeable with mainstream imported thin section bearings.
• Complete OEM & ODM custom service for radial clearance adjustment, special lubricant and outer ring identification marking.
• Strict full-process inspection: raw material hardness test, steel ball sorting, long-cycle high-speed noise aging and C3 clearance batch screening.
• Professional bearing engineers provide micro shaft load matching and thin housing installation guidance within 24 working hours.
• Factory direct bulk wholesale pricing, stable continuous mass supply for global miniature precision equipment spare part buyers.

6. Quality Control

• Raw material composition and hardness inspection for GCr15 thin-wall inner/outer rings and steel ball blanks.
• CNC thin-wall precision turning, multi-cycle stress relief tempering and ultra-precision raceway superfinishing.
• Steel ball high-temperature quenching, mirror polishing and automatic dimensional grouping sorting.
• Stamped thin steel cage forming, quantitative low-noise micro grease filling and 2RS1 rubber seal press-fitting curing procedure.
• Performance verification tests: high-speed continuous rotation noise aging, dust-mist mixed environment sealing durability, C3 clearance stability test.
• Final full dimension, bore roundness and raceway surface reinspection before anti-rust oil coating and neutral moisture-proof export carton packaging.

Each finished production batch undergoes long-term high-speed simulation test to guarantee quiet stable sealed thin-wall operation performance.

7. Get A Quote

Submit purchasing demand for 61801-2RS1/C3 thin wall bearings applied to miniature micro motors, precision optical instruments and compact automation equipment.

Full one-stop professional services after inquiry submission:

1. Official standardized quotation document delivered within 24 working hours
2. Technical support for micro light load matching, thin shaft press-fit installation and long-life lubrication
3. Custom bearing performance upgrades: P5 high precision grade, high-temperature resistant synthetic grease
4. Competitive factory direct bulk unit price for large-volume single model orders

Please state order quantity and actual operational working conditions (high-speed, narrow installation space, slightly humid dusty environment) to receive complete formal quotation documents.

8. FAQ