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Quick Details

  • Structure: Cylindrical
  • Type: Roller
  • Brand Name: XRT
  • Bore Size: 57.15 mm
  • Outside Diameter: 127 mm
  • Model Number: CRM18A
  • Precision Rating: ABEC1
  • Seals Type: open
  • Number of Row: Single Row
  • Place of Origin: Shandong, China (Mainland)
  • bearing type: inch cylindrical roller bearing
  • model: CRM18A
  • inner diameter: 57.15mm
  • outer diameter: 127mm
  • width: 31.75mm
  • material: chrome steel
  • row: single
  • precision: ABEC1

Packaging & Delivery

Packaging Details packed in industrial cartons
Delivery Time within 20 days after confirmation
CRM18A Inch cylindrical roller bearing
1. Large stock and quick delivery
2.long life and low noise
3.high precision
Specification of CRM18A Inch cylindrical roller bearing.
Inner diamter: 57.15mm
Outer diameter: 127mm
Width:                     31.75mm
Precision:          ABEC1
General introduction of CRM18A Inch cylindrical roller bearing 
To achieve satisfactory operation, single row cylindrical roller bearings, like all ball and roller bearings, must always be subjected to a given minimum load, particularly if they are to operate at high speeds or are subjected to high accelerations or rapid changes in the direction of load. Under such conditions, the inertia forces of the rollers and cage, and the friction in the lubricant, can have a detrimental influence on the rolling conditions in the bearing arrangement and may cause damaging sliding movements to occur between the rollers and raceways.
The requisite minimum load to be applied to single row cylindrical roller bearings can be estimated using where 

Frm=minimum radial load [kN]
kr=minimum load factor (see product data)
n=rotational speed [r/min]
nr=reference speed [r/min] (see product data)
dm=mean diameter of bearing 
= 0,5 (d + D) [mm]
When starting up at low temperatures or when the lubricant is highly viscous, even greater minimum loads may be required. The weight of the components supported by the bearing, together with external forces, generally exceeds the requisite minimum load. If this is not the case, the single row cylindrical roller bearing must be subjected to an additional radial load.
single row cylindrical roller bearings are manufactured with Normal radial internal clearance as standard and most of the bearings are also available with C3 radial internal clearance. Some of the bearings can even be supplied with the smaller C2 or the appreciably greater C4 clearance. In addition, some bearings are produced with special reduced clearances. This special clearance corresponds to a section of a standard clearance range or to sections of two adjacent clearance ranges.
Bearings with non-standard clearance or with the special reduced clearances can be supplied to special order.
The actual clearance limits for bearings with a cylindrical bore are provided in table and for bearings with a tapered bore in table and are in accordance with ISO 5753:1991. They are valid for unmounted bearings under zero measuring load.
Sample photos of CRM18A Inch cylindrical roller bearing 
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