Cf53/Ck53 - DIN 1.1213 Precision Ground Bar

Material Data Sheet

Linear Bearing Shaft with:
- good hardening properties
- high grinding finish
Selected for use in High Quality Linear Bearing and Guideway systems
where Induction Hardened durable materials are required
Chemical Analysis
Designation C Si Mn P S
Cf53 0.50-
0.57-		 0.15-
0.35-		 0.40-
0.70-		 max.
0.025-		 max.
0.035
Grain Size: 5-8 to ASTM
Purity: K4<30

Mechanical Properties
Condition Diameter
mm		 Yield Stress
N/mm²		 Tensile Stress
N/mm²		 Elongation
%
U+K+HI+SL 5-16 >= 360 >= 670 >= 5
U+SH+HI+SL >16-40 >= 325 >= 630 >=6
U+SH+HI+SL >40-100 >= 325 >= 630 >= 8

Dimensions and Tolerances

Standard Diameters (in mm, h6/h7 tolerance):

5- 6- 8-10- 12- 14-16- 18- 20- 22- 25- 30- 32- 35- 36- 40- 45- 50- 60- 70- 80- 100
other dimensions on request

Tolerances: standard = h6 and h7
Production lengths: max. 7800 mm

Roundness: ½ Diameter tolerance

Surface finish: Polished <0.30µm Ra		 Straightness:
<Rd.10 = <0.3mm/m
Rd. 10-20 = <0.2mm/m
=< Rd.20 = <0.1mm/m

Induction hardened:
Surfaces hardness: 60-66 HRC Depth of Hardness at ends = Rht:

Diameter Rht.(mm) Diameter Rht.(mm)
>10 0.5 + 0.5 >28-60 1.5 + 1.0
>10-18 0.8 + 0.5 >60-80 2.2 + 1.0
<18-28 1.2 + 0.8 >80 3.2 + 1.5

Normalised, Induction Hardened, 2 stage stress, relieved and ground
Condition Diameter
mm		 Yield Stress
N/mm²		 Tensile Stress
N/mm²		 Elongation
%
K+N+HI+A+SL < 16 >= 340 >610-760 >= 16
K+SH+HI+A+SL 16-100 >= 340 >610-760 >= 16

Chrome Plating
For Applications requiring higher finishes and corrosion resistance hard chrome plating with a Chrome thickness of 10 +/-5µm, Hardness >800 HV is provided.