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  4. Plain bearings
  5. Guide bushes bronze, maintenance-free
    6. 23680-022032020
Designation
Guide bush
Version 1
maintenance-free
Main material
bronze
Component material
graphite
D1=Outside diameter
32
D=internal diameter
22
L=Length
20
L1
3
R
2
UNSPSC Code
31161519
~ CONFLICT MINERALS 3TG status
3TG contained
~ CONFLICT MINERALS procurement
smelter not yet identified
~ CP65 substance 2 cancer
nickel (metallic)
~ PFAS free?
yes
~ REACH SVHC-free?
yes
~ RoHS conformity
yes, without exemption
~ TSCA 6(H) conformity
yes

Description

Material
Bronze with graphite inserts.
Version
Self-lubricating.
Hardness 190-220 HB.
Note
The guide bushes are radially and axially applicable.
The bearing elements are maintenance-free and wear-resistant.
The graphite inserts provide life-long lubrication.

Preferably for travel speeds < 0.5 m/s. (Additional lubrication is recommended for extreme loading with a higher travel speeds).
Technical Data

Material properties:
Base alloy: CuZn25Al5Mn4Fe3-C
Density: 8.0 g/cm3
Tensile strength Rm: 750 N/mm2
Yield point: 450 N/mm2
Ductile fracture A5: 5-8%
Friction coefficient: 0.05 - 0.12
Maximum speed: 15 m/min
Thermal conductivity: 50 W/m x k
Thermal expansion coefficient: 18 x 10-6
Electrical conductivity: 7-8 m/(Ω x mm2)
Solid lubricant content: 25-30 %

Temperature range
Temperature resistance max. 150 °C.
Tolerances
The bore for the bearings should correspond to ISO tolerance H7.

The tolerance h6 to h7 is recommended for the shaft.
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