Manufactured by CHG Bearing, the MR72 is a precision Metric Miniature Deep Groove Ball Bearings. Key dimensional parameters include a 2 mm bore diameter, a 7 mm outer diameter, and a 2.5 mm overall width. This component is designed to meet standard load requirements and ensure consistent operational performance. For comprehensive technical evaluation, please explore the detailed specifications, dimensional data, product images, and CAD drawings provided below. A complete PDF data sheet is also readily available for direct download to support your engineering and procurement needs.
Technical Specifications
| Overview | |
|---|---|
| Part Number | MR72 MR72 |
| Dimensions | |
| Bore Diameter (d) | 2 mm |
| Width (B) | 2.5 mm |
| Outer Diameter (D) | 7 mm |
| Open Width B | 2.5 mm |
| Radius rs min | 0.15 mm |
| Flange Df | 8.2 mm |
| Closed Width B1 | 3 mm |
| Open Flange Width Bf | 0.6 mm |
| Closed Flange Width Bf1 | 0.6 mm |
| Performance | |
| Dynamic Load Cr | 386 N 86.78 lbf |
| Static Load C0r | 129 N 29 lbf |
| Grease Speed (x1000 rpm) | 63 x1000 rpm 63 x1000 rpm |
| Oil Speed (x1000 rpm) | 75 x1000 rpm 75 x1000 rpm |
| Design Configurations | |
| Open Model | MR72 MR72 |
| Flanged Open Model | MF72 MF72 |
| Shielded Model | MR72ZZS MR72ZZS |
| Flanged Shielded Model | MF72ZZS MF72ZZS |
| 2RS | - - |
| 2RU | - - |
| TTS | TTS TTS |
| Internal Design & Weight | |
| Cage Type | W W |
| Ball Qty. Z | 7 7 |
| Ball Size Dw | 1.2 mm |
| Shielded Weight | 0.53 g 0.0012 lb |
| Flanged Shielded Weight | 0.6 g 0.0013 lb |
| Open Weight | 0.43 g 0.0009 lb |
| Flanged Open Weight | 0.5 g 0.0011 lb |
MR72 7 mm 2 mm 2.5 mm Frequently Asked Questions about MR72 Metric Miniature Deep Groove Ball Bearings
Find key technical answers regarding dimensions, specifications, and replacement options for this model.
Standard batches of CHG Bearing MR72 conform strictly to ISO Class Normal (ABEC-1). For high-precision machine tool spindles, gearboxes, or robotics requiring tighter runouts, CHG Bearing can provide custom batches graded to ISO Class 6 (P6/ABEC-3) or ISO Class 5 (P5/ABEC-5) with 100% micrometer verification.
Yes, 100% of MR72 Metric Miniature Deep Groove Ball Bearings leaving CHG Bearing production lines are subjected to multi-frequency Anderometer sound testing. All units satisfy baseline Z1V1 levels, with dedicated quiet-running electric motor quality (EMQ) lots certified to Z2V2 and Z3V3 standards for silent machinery integration.
Built for demanding industrial environments, the MR72 Metric Miniature Deep Groove Ball Bearings by CHG Bearing boasts a dynamic load rating (Cr) of standard dynamic and a static load threshold (C0r) of standard static. The optimized internal raceway geometry balances stress distribution, mitigating edge loading even when operating under peak mechanical stresses.
To safeguard CHG Bearing MR72 against fretting wear and false brinelling during transport or vibration, assemble mating surfaces (2 mm x 7 mm) using anti-fretting mounting paste. Maintaining strict alignment and avoiding prolonged static vibration will preserve raceway polish.
