MR 18307 ABEC-5 Steel Bearing

Enduro MR 18307 ABEC-5 Steel Bearing (18x30x7mm)

Article number: 360-061917
Quantity in stock: 1

Enduro MR 18307 ABEC-5 Steel Bearing

  • IDxODxWidth: 18 x 30 x 7 mm
  • Weight: 15.1 g
  • Grade 5 steel balls with ABEC 5 precision
  • Known to fit some DT hubs


Enduro MR 18307 LLB A5

Grade 5 Chromium Steel Balls

High precision balls are within 5/1,000,000″ round. These are military level specification, used for precision equipment. R-64 hardness, of the highest grade.

52100 High Carbon Chromium Alloy Races

Vacuum de-gassing process for the purest chromium alloy steel, hardened to R-62, extremely tough and very durable. Polished to a mirror finish for ABEC-5 precision and noiseless movement.

Graphite/Nylon Ball Retainers

Nylon with graphite retainers are virtually friction-less while providing constant lubrication.

The ABEC 5 Standard

To meet the ABEC-5 standard, bearing design must pass all tests, which include noise testing at high RPM, extremely close tolerances for I.D. and O.D., roundness of ball, trueness of the races and micro surface finishes of balls and races.

C-3 Clearance

This specification describes the internal clearance between the bearing and its race. For example, in a 10-18 I.D. bearing, our standard is 11-21 micrometers where as others use 11-25 micrometers.

All across the board, our bearings have higher standards of tolerance to ensure superior performance.

We are doing our best to provide accurate and up to date descriptions, specifications and images of our products, but we cannot guarantee that they are absolutely correct. Please contact us if in doubt, or to confirm a particular feature or a spec which is important to you.
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