YDTech® MANUFACTURER of hardened cylindrical needle rollers(1.3505)SAE52100! Supplier of cylindrical needle rollers(AISI52100) in china.

Chrome steel needle rollers are widely used in precision roller bearings, as well as in a number of other industrial applications. Chrome steel needle rollers have excellent surface quality, high hardness and high load bearing capacity as a result of through hardening.

chrome steel 52100 overall performances are good, after quenching and tempering, degree of hardness is high and even, the wear resisting performance is good, the contact fatigue intensity is high. the hot working of chrome steel is good, after quenching,Chrome steel has the good machinability.

Even if the profile is within the tolerance zone, there may still be local features that can cause elevated stress. ProfileMaster incorporates local convexity analysis – a powerful new tool for understanding the “bumps” that cause “stresses”. For example, this profile has a “bump” on the left side. In some applications, bumps such as these can cause major product failures. Traditional waviness parameters like “Wt” would not detect this bump as it falls inside the total peak-to-valley range of the profile.

chrome steel standards of different countries for cylindrical rollers

china (GCr15), USA (SAE52100,AISI52100), Germany (100Cr6), JIS SUJ-2

chemical properties for rolling bearing chrome (axletree) steel

rolling bearing chrome (axletree) steel

specification	mark	C	Si	Mn	S	P	Cr	Mo
china(GB)	GCr15	0.95-1.05	0.15-0.35	0.25-0.45	<0.025	<0.025	1.40-1.65	-
USA(AISI,UNS)	52100(G52986)	0.98-1.10	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.10
japan (JIS)	SUJ2	0.95-1.10	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.08
germany(DIN/W-Nr)	100Cr6/w3(1.3505)	0.95-1.05	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.08
france NF	100C6	0.95-1.05	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.08
UK(BS)	535A99	0.95-1.05	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.08
sweden(SKF)	SKF3	0.95-1.05	0.15-0.35	<0.5	<0.025	<0.025	1.30-1.60	<0.08
rolling bearing chrome (axletree) steel cylindrical roller pins,needle rollers

needle rollers have perfectly ground diameter provides perfect location of mating. tightened surface finish assure better contact with mating parts. highly controlled mechanical properties for more than desired requirements. high grade cylindrical rollers for good strength & wear resistance.

since the profile of needle is not cylindrical along its whole length as there is a very slight taper towards the ends, therefore precise measurement of the diameter can only be carried out in the central area of the needle. Needle Rollers having a greater taper at the end may be supplied on request.

cylindrical rollers also referred to as parallel pins, are commonly used to retain parts in a fixed position or to preserve alignment. Accurately ground to plus 0.0003", minus 0.0000" of the stated diameter and ?.010" of the length, they are chamfered at both ends for easy insertion. a selection of sizes and lengths is a useful addition to the well-equipped shop or laboratory.