2 Guiding systems Precision shafts
Standard designs Designs for fixed length without chamfer
Designs for fixed length with chamfer
Table 14 shows basic data for the various models for the precision shafts. Table 14 Dimension
Mass Solid shaft
d
d1
– – – – – – – – 7 12 14 19 26 35 36 53
Hollow shaft
Cross sectional area Solid Hollow shaft shaft
0.4 0.4 0.8 0.8 0.8 0.8 1 1 1 1.5 1.5 1.5 2 2 2.5 2.5
kg/m
cm4
mm2
0.06 – 0.1 – 0.15 – 0.22 – 0.39 – 0.62 – 0.89 – 1.21 – 1.57 1.28 2.45 1.26 3.83 2.40 5.51 3.55 9.80 5.40 15.3 10.6 22.1 15.1 39.2 20.1
0.0004 – 0.0013 – 0.0031 – 0.0064 – 0.020 – 0.049 – 0.102 – 0.189 – 0.322 0.310 0.785 0.597 1.92 1.64 3.98 3.46 12.6 9.96 30.7 27.7 63.6 57.1 201 153
7.1 12.6 19.6 28.3 50.3 78.5 113 154 201 314 491 707 1260 1960 2830 5030
– – – – – – – – 163 160 305 453 685 1350 1920 2565
Attention: d1 can deviate from the value quoted. Please enquire if necessary. Different shaft diameters and types on request. The static load capacity has to be decreased by 8% and the dynamic load capacity by 18% when using the non-rusting types (HV6) in conjunction with precision steel shafts made of stainless steel.
52
Designations Solid shaft of precision steel Ck53 (1.1210) Cf53 (1.1213)
Solid shaft of stainless steel X90CrMoV18 X46Cr13 (1.4112) (1.4034)
Solid shaft with high grade steel chromium Ck53 (1.1210) Cf53 (1.1213)
LJMR 8 LJMR 10 LJMR 12
LJMS 8 LJMS 10 LJMS 12
LJMR 16 LJMR 20 LJMR 25 LJMR 30 LJMR 40 LJMR 50
LJMS 16 LJMS 20 LJMS 25 LJMS 30 LJMS 40 LJMS 50
LJMH 8 LJMH 10 LJMH 12 LJMH 14 LJMH 16 LJMH 20 LJMH 25 LJMH 30 LJMH 40 LJMH 50 LJMH 60 LJMH 80
Hollow shaft high grade steel C60 (1.1221) plated
rmin
mm 3 4 5 6 8 10 12 14 16 20 25 30 40 50 60 80
Moment of inertia Hollow Solid shaft shaft
LJM 3 LJM 4 LJM 5 LJM 6 LJM 8 LJM 10 LJM 12 LJM 14 LJM 16 LJM 20 LJM 25 LJM 30 LJM 40 LJM 50 LJM 60 LJM 80
LJT 16 LJT 20 LJT 25 LJT 30 LJT 40 LJT 50 LJT 60 LJT 80
Shafts cut to special length with flat turned ends. The length tolerance of these shafts corresponds to DIN 7168, medium. The designation for a shaft with 20 mm diameter cut to a length of 1.5 m is, for example, LJM 20×1500.
© SKF 2005