Short cylindrical roller

Category:

Rollers for fuel pumps

Keywords:

The friction coefficient is small, suitable for high speed, and the limit speed is close to the deep groove ball bearing.

Main parameter
Similar Specification
Main uses

- Commodity name: Short cylindrical roller
- Out diameter & tolerance: 6.00(+0/-0.01)
- Length & tolerance: 6.00(+0/-0.005)
The friction coefficient is small, suitable for high speed, and the limit speed is close to the deep groove ball bearing.

Material: GCR15 (Equal to AISI52001)

Hardness: HRC60-65

Out diameter tolerance: 6.00(+0/-0.01)

Length tolerance: 6.00(+0/-0.005)

Parallelism: 0.005mm

Perpendicularity: 0.005mm

Endface runout: 0.005mm

Roundness: 0.001mm

Roughness: Ra0.16um

The quality short cylindrical roller and raceway are linear contact bearings. Load capacity mainly bears the radial load. The friction between the rolling element and the retaining edge of the ring is small, which is suitable for high-speed rotation. According to whether the ring has ribs, it can be divided into single-row short cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double-row short cylindrical roller bearings such as NNU, NN. The bearing has a separable structure with an inner ring and an outer ring.
　　In a short cylindrical roller bearing with no ribs on the inner or outer ring, the inner ring and outer ring can move relative to the axial direction, so it can be used as a free-end bearing. A short cylindrical roller bearing with double ribs on one side of the inner ring and outer ring and a single rib on the other side of the ring can bear a certain degree of axial load in one direction. Generally, stamping steel cages or solid cages made of copper alloy cars are used. However, there is also a part of the use of polyamide forming cage. So what are its characteristics?
　　1. The short cylindrical roller and the raceway are in line contact or repaired offline contact, with large radial bearing capacity, suitable for bearing heavy loads and impact loads.
　　2. The friction coefficient is small, suitable for high speed, and the limit speed is close to the deep groove ball bearing.
　　3. The N type and NU type can move axially, can adapt to the change of the relative position of the shaft and the housing caused by thermal expansion or installation error, and can be used as free-end support.
　　4. The processing requirements for the shaft or the seat hole are relatively high, and the relative deflection of the outer ring axis after the bearing is installed must be strictly controlled to avoid contact stress concentration.
　　5. The inner ring or outer ring can be separated for easy installation and disassembly.
Key words:
- Short cylindrical roller

Solid series as the picture 2 show
OD Series	Describes (OD*Length)
3.50mm series	3.50*3.50
4.00mm series	4.03.00, 4.04.00, 4.0*5.00
5.00 mm series	5.04.00, 5.05.56, 5.06.00, 5.07.48
5.50mm series	5.53.18, 5.55.96, 5.56.00, 5.56.8
6.00 mm series	6.0*6.00
Hollow series as the picture 3 show
OD Series	Describes (OD*Length-Hole size)
5.00 mm series	5*6-3
5.5 mm series	5.63.39-3, 5.63.14.0, 5.5633.145-3.81
6.00 mm series	6*5.99-3.5

1: Fuel pump, diesel oil pump,

2: Gasoline pump, motor driven pump

3: Water pump, lubricating pump

4: Cylindrical roller type pumps for some other use

5: Power Steering Pump, brake pump

6: Automobile turning power pump

7: Ethanol fuel pump for automobile

8: Self priming oil pump