Product Details

5-675X Universal joints,universal cross bearing

1.Raw material :20Cr/20CrMnTi(structural alloy steel):

for spider:20Cr / 20CrMnTi;

for bushing:20Cr/GCr15;

for needle roller:GCr15.

for cross assembly: 20CrMnTi

2.chemical component:

C	Si	Mn	Cr	P	S
0.18~0.24	0.17~0.37	0.50~0.80	0.70~1.00	≤0.030	≤0.030

chanical property:

Material no.

Heat treatment

Surface

hardness

tensile strength

(σb)

yield strength

(σs)

flexure-torsion fatigue

(σ-1)

Shear fatigue

(τ-1)

Bending stress

[σ-1]

20Cr

carburizing

quenching

temper

58~64HRC

640

390

305

160

ction of u-joint assembly

1).safety factor of static torsion strength:≥2.0

2).torsional fatigue life: ≥1.5x105 cycle index.

3).wearing life: ≥60h .

5.heat treatment:

spider:

1).surface hardness:58-64HRC

2).inner hardness:25-45HRC or 38-48HRC(20CrMnTi)

6.bearing cap:

1).surface hardness:58-64HRC

2).the depth of effective hardened layer:0.3~0.7mm.

3).metallography structure:M+A’1-5 level.

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