SFERAX has a highly qualified and experienced department specially dedicated to the production of high precision shafts. It adapts flexibly to the most diverse requirements and its engineering office has all the needed skills to support you in your designs.

Based on more than 60 years of experience, the company is able to provide customised manufacturing according to drawings, a simply h6 guide shaft or other special tolerances. SFERAX shafts can be used for all kinds of applications that do not necessarily require bearings, such as guide columns, piston rods, rings, etc.

Our strength also lies in the heat treatments available. Whether you require surface-hardened, through-hardened, case-hardened, Tennifer treated, nitrided or other surface treatments, we offer you a wide range of products to meet your needs and our expertise in the field, as well as trusted partners exclusively in Switzerland to carry out your projects.

Our manufacturing program is as follows:

  • Surface-hardened shafts
  • SFERAX standard -> Manufactured in quality class I-III & IIIR
  • SFERAX in inch -> Manufactured in quality class I-III & IIIR
  • SFERAX Tube -> Manufactured in quality class I-III & IIIR
  • SFERAX INOX -> Manufactured in quality class I-III & IIIR
  • SFERAX Chromed 5 à 10 µm -> Manufactured in quality class III – h7

                                                                                        (h6 on request)


Quality class

Description

Straightness

Available tolerance(s)

I

Highest quality – induction-hardened, ground between the tips, honed, polished

Maximum 0.004 mm by 100 mm

A – XA – ZA

IIIR

Standard quality impoved by honing, polished

Maximum 0.10 mm by 1000 mm

A – XA – ZA

III

Standard quality - ground

Maximum 0.10 mm by 1000 mm

B

 

 

Tolerance in µm

Recommended bearing tolerance

Ø Shaft (mm)

3-15

15,7-25.4

30-50,8

60-76,2

80-101,6

125-150

Precision grade

ZA

0/-2

0 -3

0 -4

0 -5

0 -6

0 -10

ZA

XA

-3/-6

-3 -6

-3 -7

-3 -8

-3 -9

-3 -18

XA

A

-5/-9

-5 -9

-5 -10

-5 -11

-5 -12

-5 -20

A

B

h6

h6

h6

h6

h6

h6

B – BA

Material 

  • Induction-hardened steel DIN CF53 / 1.1213
    Available diameters: 5 – 80 mm (other dimensions on request)
    Hardness: 65 HRC  0/-5             If hard-chromed : 69 HRC  0/-4
  • Stainless Steel DIN X90CrMoV18 / 1.4112
    Available diameters: 5 – 40 mm (other dimensions on request)
    Hardness : 59 HRC  0/-5

 

  • Heat treatable steel (tube) DIN C60 / 1.0601
    Available outer diameters: 12 – 40 mm (other dimensions on request)
    Hardness: 66 HRC 0/-6

Hardening depth: 1 to 4 mm (depends on the diameter)

  • Through-hardened shafts

 

Quality class

Description

Available tolerance

II

Superior quality – through-hardened, centerless ground, polished

+/- 0.002 µm
(h5 on request)

Material

  • Bearing steel DIN 100CR6 / 1.3505
    Available diameters: 3 – 6 mm (other dimensions on request)
    Hardness: 65 HRC  0/-3

Miscellaneous information
Linear mass (not valid for tubes)


Ø
Kg/m

5
0.15

6
0.22

8
0.39

10
0.62

12
0.89

15
1.39

16
1.58

17
1.78

18
2.00

20
2.47

Ø
Kg/m

25
3.85

30
5.55

35
7.55

40
9.87

45
12.48

50
15.41

60
22.22

70
30.20

80
39.50

 


Calculation of deflection according to load: See our FAQ