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Tolerances and precision classes Component tolerances - spacers and clamping nuts Rotational accuracy of the spindle also depends on manufacturing precision of spacers and nuts. Spacers Clamping nuts A L1 T1 A T2 C C B L2 T1 B Ø Bearing seat dia. Spacers must be rigid enough to avoid any bending during tightening. They should be no longer than 200 mm. Tolerances for their alignment and length differences are specified below. Whether the nut is threaded or pressed on, its clamping face must be perpendicular to the bearing seat. The axial run-out tolerance of the face is specified below. Maximum tolerances in microns Nominal bore of spacer or nominal diameter of bearing seat Spacer Nut Difference in length T2 T2 between L1 and L2 ISO4 ISO2 ISO4 ISO2 ISO4 ISO2 10 to 18 2 1 2 1 5 3 > 18 to 30 2 1 2 1 6 4 > 30 to 50 2 1 2 1 7 4 > 50 to 80 2 1 3 2 8 5 > 80 to 120 3 2 3 2 10 6 > 120 to 180 3 2 4 3 12 8 > 180 to 250 4 3 5 4 14 10 60
Maintenance and services Maintenance is a major issue, particularly for heavily used <strong>com</strong>ponents such as bearings. It has an influence on productivity, occupational health and safety, and the environment. Maintenance is a risk avoidance operation based most of all on human know-how. Our teams will talk you through their expertise over the course of this chapter … • Storage 62 • Assembly 63-66 • Vibratory analysis 67 • Expert analysis, training 68
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Industry MachLine ® : the perfect
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Contents Everything there is to kno
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SNR is part of the history of beari
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MachLine ® : meeting every challen
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MachLine ® : a vast array of solut
Page 12 and 13: MachLine ® : a vast array of solut
Page 14 and 15: Preload: a direct effect on the app
Page 16 and 17: Preload: parameters to take into ac
Page 18 and 19: Influence of an external axial load
Page 20 and 21: Spindle design: simplified calculat
Page 22 and 23: Spindle design: simplified and corr
Page 24 and 25: Spindle design: corrected calculati
Page 26 and 27: Spindle design: simulations Design
Page 28 and 29: Appropriate lubrication: the secret
Page 30 and 31: MachLine ® selection guide Our Mac
Page 32 and 33: MachLine ® CH - Hybrid: selecting
Page 34 and 35: MachLine ® ML - High Speed: our so
Page 36 and 37: MachLine ® HNS - N: for extreme co
Page 38 and 39: Spindle types and installation exam
Page 40 and 41: Symbol system for MachLine ® beari
Page 42 and 43: MachLine ® : ranges High Precision
Page 50 and 51: MachLine ® : ranges High Speed and
Page 52 and 53: MachLine ® : ranges High Speed and
Page 54 and 55: Precision self-locking nuts It is h
Page 56 and 57: Precision self-locking nuts Dimensi
Page 58 and 59: Tolerances and precision classes Ri
Page 60 and 61: Tolerances and precision classes Be
Page 64 and 65: Storage: rules to follow Every SNR
Page 66 and 67: A Installation: rules to follow Lub
Page 68 and 69: Installation: rules to follow Run-i
Page 70 and 71: Expert analysis, training: passing
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