How to install NSK Linear products - Tutorial - 2. How to install NSK Ball Screw and Support Units.
Correct installation of NSK Ball Screw is important for long life, low friction and high accuracy. Find out how you can install the NSK Ball Screw, essential for linear motion, using proper procedure.
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0:11 If the moving table is obstructing ball screw installation, temporarily remove it. Then clean the mounting surface of support unit housing and base.
0:49 Temporarily install the ball screw and support units housings
1:53 Install support unit. Loosely install the lock nut.
3:30 Confirm vertical alignment of ball screw against linear guide
4:22 Adjust the position of support unit housing to maintain parallelism (vertical) using shim etc.
4:35 Confirm lateral alignment of ball screw against linear guide
4:56 Adjust the position of support unit housing to maintain parallelism (horizontal)
5:10 Tighten bolts with specified torque to fix support unit housing
5:28 Check shaft end runout while locknut is loosely tightened.
5:45 While adjusting the shaft end runout, fasten te locknut to attain required tightening torque
6:02 Re-attach the moving table
6:14 Attach nut housing to moving table
7:00 If you are using long length ball screw, move the ball screw nut toward the support unit in order to minimize the bending of screw shaft by self weight of the nut
7:05 Attach ball screw´s nut to nut housing
7:34 Loosen the bolts that fasten the table to the nut housing, and re-fasten them
7:50 Loosen the bolts that fasten the nut housing and the nut, and re-fasten them
8:23 Tighten bolts with specified torque
8:50 Measure the driving torque of ball screw with the moving table in the center
9:07 Measure the driving torque of ball screw with the moving table at right stroke end
9:24 Measure the driving torque of ball screw with the moving table at left stroke end
9:38 If the ball screw drive torque is excessive or has variation, or if the motion is not smoth, then there may be misalignment problem. Try to re-install the ball screw.
9:57 Attach motor bracket to base
10:41 Measure inclination of motor mounting surface against ball screw. If inclination is large, adjust with shim etc.
11:34 Measure eccentricity of motor mounting pilot bore against ball screw. If eccentry error is large, adjust the position of motor bracket.
12:20 Check coupling´s specification for allowable inclination and eccentricity error.
12:24 Attach coupling and motor. Affix motor with bolts.
13:10 Check that coupling can rotate freely before tightening the screw.
13:19 Tighten bolts of the coupling, to connect shaft end with the motor shaft.
13:40 Refer to catalog for recommended tightening torque of cap screw and locknut, mounting accuracy reuirements.
! Please note: For high accuracy installation, please follow our catalogue instructions or contact us on www.nskeurope.com !
About NSK Europe:
NSK products and solutions are everywhere where something is moving – even deployed under the hardest of conditions. Our high precision roller bearings and ball bearings are spinning away in wind turbines and machine tools, our linear systems are hard at work in production lines. As a worldwide strategic partner to the top automobile manufacturers and suppliers, NSK provides solutions that offer more performance while taking up less space. Intelligent steering systems, engine, wheel hub and transmission bearings – our OE car parts not only ensure more efficient use of fuel, but also increased safety for automobiles.
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