Screening Services & Training LLC
Last Update 9/28/2009
25092 Natama
Ct
This procedure is based upon a paper written by Screening Systems, Inc.
Laguna Hills, CA 92653-5607
How to: Properly Install All-Thread on to QRSTM Type Tables
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Proper installation for
All-thread rods into QRS type vibration tabletop inserts.
The most common reason for inserts coming loose from, or pulling out of, the
table surface is the installation of all-thread without using washers between
the nut and the tabletop.
If the washer is not used, the nut tightens on the top of the insert allowing
the insert to rock during vibration. This rocking will very rapidly
loosen the insert and allow the threads to rip out of the table.
Nuts and washers must also be used when fixtures, clamps, or cross-bars are
fastened to the table with all-thread or bolts such that a space exists between
the tabletop and fixture/clamp bottom surfaces.
The torque for both 3/8-16 and M-10X1.5 grade 8 bolts and steel nuts should be
between 23 to 30 FT-LBS. (31 to 41 N-m)
It is not advised to use stainless steel all-thread or stainless steel bolts
with the QRSTM type table as these have been known to jam within the
table inserts. The galling of the similar materials with similar
molecular structure causes this jamming.
For technical assistance contact Screening Services & Training LLC via e-mail. scrserv@cox.net