SPIETH MSW Series - Page 6

Document
ma-mswg-en1817
Page 6 of 7
Assembly Instructions
MSW from M72 to M140
©Spieth
Proprietary
notice
ISO 16016
Previous document: ma-mswg-en1604
See
www.spieth-me.de/english/service-download/catalogue-instructions/
Successive document: N/A
Created: 27 Apr 2018/Fd
For any questions, requests or suggestions, please contact
info@spieth-me.de
Checked: 27 Apr 2018/Ax
3.3.2 Aligning:
Tighten the clamping screws stepwise and crosswise. Regularly check how much play the nut has on the thread.
Repeat this process until the movement is nearly free of clearance. This aligns the end face of the locknut with
the spindle axis and requires very little torque on the clamping screws (normally far less than 1Nm); we
recommend using a manual tool (screwdriver or spanner) for sensitive tightening.
3.3.3 Placing and locking:
Place locknut on planar support and lock by tightening the clamping screws stepwise and crosswise until the
specified locking torque M
S
(see design guide). For optimum effectiveness we recommend tightening the
clamping screws in three steps (50%, 75% and 100% of the specified locking torque M
S
).
3.3.4 Pretensioning (1):
To reduce subsidence, first use a suitable tool (see design guide) and an increased bolting torque M
Be
to tighten
the pretensioning bolts stepwise and in the specified order against the planar support; then undo it. Depending
on the resilience of the connecting components, the increased bolting torque M
Be
of the locknut may amount up
to 1.2 to 1.5 times the calculated bolting torque M
B
(see design guide)
3.3.5 Pretensioning (2) and locking the pretensioning bolts
Now tighten the pretensioning bolts with the calculated bolting torque M
B
(see design guide/see note). For
optimum effectiveness we recommend tightening the clamping screws in three steps (50%, 75% and 100% of the
calculated bolting torque M
B
).
Secure pretensioning bolts against undoing by tightening the locking thread pins. Then check locking torque M
S
of
the clamping screws.
Pretension and lock Spieth locknuts only if used with original Spieth clamping screws and if the nut thread is fully
screwed onto the spindle thread.
In case of maximum demands on spindle concentricity you can individually adjust the pretensioning bolts to
achieve the desired result. Following specified assembly, Spieth locknuts are ready for use immediately.
For more information on assembly, please see the relevant assembly instructions, available at www.spieth-me.de.