YDTech® manufacturer of loose columnar rollers for cylindrical roller bearing; supplier of cylindrical rollers for axial bearing parts as rolling element units in china.

What's cylindrical roller?

the cylindrical rollers, it is meaning the outer surface is substantially straight and parallel to the axi of the roller. the cylindrical rollers are precision parts for bearing.

steel cylindrical rollers are remarkable for their high mechanical strength and long lasting functional life. cylindrical rollers had multiple uses in a variety of industries including automotive, truck, farm and construction equipment, two-cycle engines, outboard engines and consumer durables.

these rollers are in high precision, and widely used in the areas of airplane, express train, robot, NC machinery, ship, engineering machinery, and bearing.

precision cylindrical roller bearings

the precision cylindrical roller bearings for screw drives feature a combination of axial cylindrical rollers and radial needle rollers. This unique configuration helps manage loads from multiple directions during highspeed operation. Several designs are available to accommodate varying screw drive designs.

the ground ends needle rollers are mainly used as bearing rolling elements to transmit torque and reduce friction. They can also serve as precision shafts or as precision locating pins

sizes of cylindrical rollers elements

precision cylindrical rollers of loose roller bearings

sizes	Dw	Lw	rsmin	rsmax	sizes	Dw	Lw	rsmin	rsmax
3x3	3	3	0.2	0.4	3x5	3	5	0.2	0.4
3.5x5	3.5	5	0.2	0.4	4x4	4	4	0.2	0.4
4x6	4	6	0.2	0.4	4x8	4	8	0.2	0.4
4.5x4.5	4.5	4.5	0.2	0.6	4.5x6	4.5	6	0.2	0.6
5x5	5	5	0.2	0.6	5x8	5	8	0.2	0.6
5x10	5	10	0.2	0.6	5.5x5.5	5.5	5.5	0.2	0.6
5.5x8	5.5	8	0.2	0.6	6x6	6	6	0.2	0.6
6x8	6	8	0.2	0.6	6x10	6	10	0.2	0.6
6x12	6	12	0.2	0.6	6.5x6.5	6.5	6.5	0.2	0.6
6.5x9	6.5	9	0.2	0.6	7x7	7	7	0.2	0.6
7x10	7	10	0.2	0.6	7x14	7	14	0.2	0.6
7.5x7.5	7.5	7.5	0.2	0.6	7.5x9	7.5	9	0.2	0.6
7.5x11	7.5	11	0.2	0.6	8x8	8	8	0.2	0.6
8x10	8	10	0.2	0.6	8x12	8	12	0.2	0.6
9x9	9	9	0.3	0.7	9x10	9	10	0.3	0.7
9x14	9	14	0.3	0.7	10x10	10	10	0.3	0.7
10x11	10	11	0.3	0.7	10x14	10	14	0.3	0.7
11x11	11	11	0.3	0.7	11x12	11	12	0.3	0.7
11x15	11	15	0.3	0.7	12x12	12	12	0.3	0.7
12x14	12	14	0.3	0.7	12x18	12	18	0.3	0.7
13x13	13	13	0.4	0.8	13x20	13	20	0.4	0.8
14x14	14	14	0.4	0.8	14x20	14	20	0.4	0.8
15x15	15	15	0.4	0.8	15x16	15	16	0.4	0.8
15x22	15	22	0.4	0.8	16x16	16	16	0.4	0.8
16x17	16	17	0.4	0.8	16x24	16	24	0.4	0.8
17x17	17	17	0.4	1.0	17x24	17	24	0.4	1.0
18x18	18	18	0.4	1.0	18x19	18	19	0.4	1.0
18x26	18	26	0.4	1.0	19x19	19	19	0.4	1.0
19x20	19	20	0.4	1.0	19x28	19	28	0.4	1.0
20x20	20	20	0.4	1.0	20x30	20	30	0.4	1.0
21x21	21	21	0.5	1.1	21x30	21	30	0.5	1.1
22x22	22	22	0.5	1.1	22x24	22	24	0.5	1.1
22x34	22	34	0.5	1.1	23x23	23	23	0.5	1.1
24x24	24	24	0.5	1.1	24x26	24	26	0.5	1.1
24x36	24	36	0.5	1.1	25x25	25	25	0.5	1.1
25x36	25	36	0.5	1.1	26x26	22	26	0.5	1.1
26x28	22	28	0.5	1.1	26x40	22	10	0.5	1.1
28x28	28	28	0.6	1.4	28x44	28	44	0.6	1.4
30x30	30	30	0.6	1.4	30x48	30	48	0.6	1.4
32x32	32	32	0.6	1.4	32x52	32	52	0.6	1.4
34x34	34	34	0.6	1.4	34x55	34	55	0.6	1.4
36x36	36	36	0.7	1.7	36x58	36	58	0.7	1.7
38x38	38	38	0.7	1.7	38x62	38	62	0.7	1.7
40x40	40	40	0.7	1.7	40x65	40	65	0.7	1.7
42x42	42	42	0.9	2.1	45x45	45	45	0.9	2.1
total	more than 100 cylindrical rollers of loose roller bearings

diameter and roundness of cylindrical rollers

I_G=roller diameter gauge interval.

precision cylindrical rollers of loose roller bearings

grade	Dw/mm		VDwL	IG	regulation values			▽Cir
	exceed	to	max					max
G0	-	18	1	1	-10,...,-1	0	+1,...,+5	0.3
G0	18	30	1	1	-10,...,-1	0	+1,...,+5	0.4
G1	-	18	2	1	-10,...,-1	0	+1,...,+5	0.30.4
G1	18	30	2	1.5	-10.5,...,-1.5	0	+1.5,...,+6	0.5
G2	-	18	3	1	-10,...,-1	0	+1,...,+5	0.5
G2	18	30	3	1.5	-19.5,...,-1.5	0	+1.5,...,+6	1.0
G2	30	-	3	2	-20,...,-2	0	+2,...,+6	1.5
G3	-	18	1	1	-10,...,-1	0	+1,...,+5	1.0
G3	18	30	1	2	-20,...,-2	0	+2,...,+6	1.5
G3	30	-	5	3	-24,...,-3	0	+3,...,+6	2.5
total	10 cylindrical rollers of loose roller bearings

V-block measurement for roundness of cylindrical rollers

precision cylindrical rollers of loose roller bearings

angle	wave numbers
	3	5	7	9	11	13	15	17	19	21
60°C	3	-	-	3	-	-	3	-	-	3
90°C	2	2	-	-	2	2	-	-	2	2
120°C	1	2	2	1	-	-	1	2	2
total	3 cylindrical rollers of loose roller bearings