MR117-2RS Miniature Sealed Deep Groove Ball Bearing For Precision Mechanisms | 7×11×2.5 Mm

The MR117-2RS is an Ultra-Miniature Deep Groove Ball Bearing designed for applications where space is extremely limited and reliable sealing against contaminants is essential. Featuring double rubber contact seals (2RS) on both sides, this bearing provides superior protection against dust, moisture, and fine debris while maintaining smooth rotational performance. With a 7 mm bore and a compact 11×2.5 mm cross-section, it is ideal for micro motors, small instruments, precision mechanisms, and devices operating in challenging environmental conditions.



MR117-2RS Deep Groove Ball Bearing 7x11x2.5 mm | Ultra-Miniature Series | Double Rubber Sealed

This metric miniature bearing is built with full-contact rubber seals for maximum environmental resistance in compact assemblies. The universal deep groove design supports both radial and axial loads, ensuring reliable operation in high-precision, small-scale mechanical systems. Suitable for use in low to moderate speed applications where sealing integrity and compactness are critical.

MR117-2RS Miniature Sealed Deep Groove Ball Bearing | 7×11×2.5 Mm

Comprehensive Applications

Ideal for precision devices and compact mechanisms that demand reliable sealing and minimal space:

Micro Motors & Drives
  • Small DC and Stepper Motors
  • Encoder and Sensor Motors
  • Cooling Fans for Electronics
  • Miniature Pump Motors
Precision Instruments & Medical
  • Dental and Surgical Hand Tools
  • Laboratory Analytical Equipment
  • Optical Adjusters and Focus Drives
  • Portable Diagnostic Devices
Consumer Electronics & Gadgets
  • Small Printers and Scanners
  • Camera Autofocus Mechanisms
  • RC and Drone Servo Actuators
  • Personal Care Appliances
Industrial Controls & Automation
  • Micro Actuators and Valves
  • Positioning Stages
  • Robotic Gripper Joints
  • Instrumentation Drives

Key Performance Features

01. Complete Sealing with Double Rubber Seals

Two-sided low-friction rubber contact seals (2RS) provide excellent defense against dust, moisture, and contaminants. This sealing solution retains lubrication effectively, extends service life, and is ideal for non-clean or humid environments.

02. Compact & Lightweight Design

With ultra-small dimensions of 7×11×2.5 mm, this bearing offers a space-saving solution without sacrificing load capacity. Its lightweight construction reduces inertia, making it suitable for high-accuracy, small-factor devices.

03. Reliable Performance in Precision Assemblies

Manufactured to fine tolerances with smooth raceways and consistent ball geometry, the MR117-2RS ensures low noise, minimal vibration, and stable rotation, key for sensitive instrumentation and micro-mechanical systems.

Technical Specifications

Bearing Type Single Row Deep Groove Ball Bearing
ISO Dimension Series MR Series – Ultra-Miniature Series
Basic Designation MR117
Suffix 2RS (Double rubber contact seals)
Bore Diameter (d) 7 mm
Outer Diameter (D) 11 mm
Width (B) 2.5 mm
Material (Races & Balls) Chrome Steel (GCr15 / SAE 52100)
Precision Class Standard / P5 Grade Available
Cage Material Pressed Steel Ribbon
Dynamic Load Rating (Cʳ) 1.12 kN
Static Load Rating (C₀ʳ) 0.48 kN
Limiting Speed (Grease) 18,000 r/min
Limiting Speed (Oil) 24,000 r/min
Weight (approx.) 1.8 g

Interchange Part Numbers

Direct replacement for:

  • SKF: MR117-2RS
  • NSK: MR117ZZ
  • FAG: MR117-2RS
  • NMB: MR117-2RS
  • NTN: MR117-2RS

Design & Configuration

The MR117-2RS comes standard with double rubber contact seals for full protection. For applications requiring non-contact shielding with lower friction, the double metal shielded version (MR117-ZZ) is available.

"The MR117-2RS is the preferred choice for miniature applications exposed to dust or moisture, where effective sealing is as important as compact size."



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