YDTech® manufacture of precision miniature needle roller pins! supplier of short micro rollers, wedge shape rollers,mini needle rollers in china.

we manufacture super miniature diameter super needle rollers, the minimum diameter 0.5mm, and we supply super short cylindrical rollers, such as 0.5*0.8mm.1.0*1.0mm, 1.5*1.5mm, 2.0*2.0mm, 3.0*3.0mm, 3.5*3.5mm, 4.0*4.0mm

we are manufactured precision rollers parts. including cylindrical rollers,spherical rollers, needle rollers, tapered rollers, cuspidal ends rolles, arc correction line rollers, logarithm profile rollers etc. we will provide you quality needle roller with competitive price and excellent service.

Precision needle rollers have multiple uses in a variety of applications. 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. Needle rollers with a controlled contour profile are available to reduce end stresses. special end forms provide performance benefits for specific kinds of applications.

One unique aspect of these critical profiles is that certain areas of the profile must be controlled to tighter tolerances.

Length of cylindrical rollers

I_GL=roller length gauge interval.

cylindrical rollers(regulation values,tolerance, grade, changes of length volume quantities, length gauge value spacing, face runout value.

super short cylindrical rollers, precision cylindrical rollers

grade	Lw/mm		VLwL	IGL	regulation values	SDw
	exceed	to	max			max
G0	-	26	6	6	-30,...,-6.0	3
G0	26	-	6	6	-30,...,-6.0	3
G1	-	26	10	6	-30,...,-6.0	5
G1	26	-	10	10	-40,...,-10.0	5
G2	-	26	14	6	-30,...,-6.0	6
G2	26	50	14	10	-40,...,-10.0	6
G2	50	-	14	12	-48,...,-12.0	6
G3	-	26	20	8	-32,...,-8.0	10
G3	26	50	20	10	-40,...,-10.0	10
G3	50	-	20	12	-48,...,-12	10
high super short cylindrical rollers, precision cylindrical rollers,cylindrical rolling elements,

surface roughness of cylindrical rollers

super short cylindrical rollers, precision cylindrical rollers

grade	rolling surface Ramax	ends face Ramax	chamfer Ramax
G0	0.1	0.125	1.25
G1	0.125	0.16	1.25
G2	0.16	0.25	2.5
G3	0.25	0.32	2.5
high super short cylindrical rollers, precision cylindrical rollers,cylindrical rolling elements,

sizes of cylindrical rollers(super short)

super short cylindrical rollers, precision cylindrical rollers

φ0.8*0.5mm	φ0.8*0.6mm	φ0.8*0.8mm
φ1.00*0.8mm	φ1.00*0.9mm	φ1.00*1.0mm
φ1.50*0.8mm	φ1.50*0.8mm	φ1.50*1.5mm
φ2.00*0.6mm	φ2.00*0.7mm	φ2.00*2.0mm
φ2.50*1.00mm	φ2.50*1.5mm	φ2.50*2.5mm
φ3.00*1.5mm	φ3.00*2.0mm	φ3.00*3.0mm
φ3.50*2.0mm	φ3.50*2.2mm	φ3.50*3.5mm
φ4.00*3.0mm	φ4.00*3.5mm	φ4.50*4.5mm
φ5.00*4.0mm	φ5.00*4.5mm	φ5.00*5.0mm
φ5.50*3.5mm	φ5.50*4.5mm	φ5.50*5.50mm
φ6.00*5.0mm	φ6.00*5.5mm	φ6.00*6.0mm
φ6.50*5.0mm	φ6.50*5.5mm	φ6.50*6.0mm
φ7.00*6.5mm	φ7.00*6.6mm	φ7.00*7.0mm
φ7.50*5.6mm	φ7.50*6.7mm	φ7.50*7.5mm
φ8.00*6.6mm	φ8.00*7.7mm	φ8.00*8.0mm
φ8.50*5.0mm	φ8.50*6.8mm	φ8.50*8.5mm
φ9.00*6.5mm	φ9.00*8.8mm	φ9.00*9.0mm
φ12.00*10.0mm	φ12.00*11.5mm	φ12.00*12.0mm
φ......	φ......	φ......
high super short cylindrical rollers, precision cylindrical rollers,cylindrical rolling elements,

Permissible values of the change chamfer of cylndrical rollers

super short cylindrical rollers, precision cylindrical rollers

chamfer	maximum	minimum
0.2	0.3	0.1
0.3	0.5	0.2
0.5	0.8	0.3
0.8	1.2	0.5
1.0	1.5	0.6
1.2	1.7	0.7
1.5	2.2	1.0
2.0	2.7	1.0
2.5	3.5	1.5
3.0	4.0	2.0
high super short cylindrical rollers, precision cylindrical rollers,cylindrical rolling elements,