WI-134-1A Mitutoyo

Date: 21/02/12 Issue: 1A
WI-134
INSTRUCTION:
Process for use of Mitutoyo BH
Co-ordinate Measuring Machine (CMM)
Document ID: WI-134 Issue 1A Page 1 of 20 Master Location: Document Control
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Prepared By Approved By
Signature B. Snape / P. Rouse B. Snape
Date 21/02/12 21/02/12

WI-134
INSTRUCTION:
This document is the property of Axiom Rail and shall not be copied in part or in full without
the written permission of the Safety and Compliance Manager.
DOCUMENT REVISION RECORD.
This schedule will be updated when necessary by the issue of amended pages.
Amendments to the previous text will be detailed within the table below.
Rev Revision Details Prepared Approved
1A First Issue B. Snape / P. Rouse
21/02/12

WI-134
INSTRUCTION:
Purpose
The purpose of the Work Instruction is to provide clear instructions to the Wheels
Department, how to use the Co-ordinate Measuring Machine (CMM) to measure bearing
internal an external diameters, as part of the quality process designed to isolate bearing
rings which are not within the size tolerance specified.
Scope
This Work Instruction is a step by step guide to using the Mitutoyo Co-ordinate Measuring
Machine (CMM) located in the Wheels Department Quality Assurance Room. This is used in
the training and instruction of members of staff who are required to use this equipment.
Requirements
Members of the Wheels Department must be competent in the use of the CMM prior to
being allocated to regularly performing this quality check.
Staff must be assessed against, and be proficient in the use of the CMM according to the
process defined in this Work Instruction.
Competence in this use of the CMM should be checked every two years to confirm
continuing competence.
A measurement task should be set by the assessor, and should have printed results that
can be verified by the assessor as evidence of competence.
N.B. The plastic non-slip mat is to be replaced every 12 months with an approved
mat.

WI-134
INSTRUCTION:
Procedure
Visually check that the machine is in calibration and is acceptable to operate. The printer is loaded
with paper and the ink levels are okay.
Make sure the non-slip plastic bed is firmly secured and screwed down on to the granite bed of the
machine.
Turn on the CMM Computer Printer
Allow time for the computer screen to warm up.
Make sure that all three ‘Axis-lock Switches’
on the right hand Column of the CMM is
switched to the Right. This locks each of the
three Axis of the Probe assembly in place.
Left is lock, Right is unlock.
• SWITCH-X locks the
Left/Right X-Axis
• SWITCH-Y lock the
Back/Forward Y-Axis
• SWITCH-Z locks the
Probe Up/Down Z-Axis
On the computer screen should be highlighted
3D-GEOPAK...
Press Enter.
Screen showing --------- Showing Con Fig. Yes
– No. need Yes.
Press Enter.
Screen Showing -------- Define Probe Matrix. 1-
5-0
Press Enter.
Press Enter again.

WI-134
INSTRUCTION:
Screen showing Matrix of bearings by type
starting at N/o 1: (No. 3 Timken is shown)
Select program from the matrix by checking the
bearing type recorded on SF-266-C and
Bearing Check Sheet SF-076-A.
Check Unit of Measurement on the selected
program and set the switch at the front of the
bed to the correct unit of measurement. Failing
to do this will result in a red print out, failing the
bearing. Most measurements are in ‘mm’ (RED)
NB. RED is mm
GREEN is Inches
Press F6. To Repeat Mode
Press Enter.
Screen showing N/o of Reps, and blue box
showing No.3 (Timken in this case).
Press Enter.
Now enter the Job No. shown in the job number
box on from the SF-077 Bearing Check Sheet.
Press Enter.

WI-134
INSTRUCTION:
1. ROLLER ASSEMBLY
See Screen Instruction - place Roller Assembly
No.1 on the machine
Place bearing roller assembly on to the non-slip
plastic bed.
Now follow on screen instructions.
Take a plane on the top of the roller assembly
Inner Ring.
Press Enter.
Screen changes showing 1-4.
Move switches X-Y to the right to unlock.
Holding Probe head, unlock Z, then move the
Probe assembly.

WI-134
INSTRUCTION:
Move the Probe assembly forwards and to your
left, pulling down on the centre probe support
arm to take plane. Position probe as in the
photo.
Touching the top of the roller assembly take four
equal readings. The screen will highlight the
number of contacts. When the four
measurements are taken and this is confirmed
by the screen.
Retract probe head and lock using switch Z.
Press Enter
Printer prints off results.
(These will build up the Results Print-out to
go into the Bearing-Pack).
Screen changes to --------- Take a circular from
the inner ring.
Screen shows 1-8

WI-134
INSTRUCTION:
Now the machine will check roundness of the
assembly.
Pull down the probe support arm. When in position
move switch Z to the left this will unlock the
movement of the Probe assembly.
Now take eight equal measurements by touching
the probe on the inside of the bearing assembly
12mm down. The applications are recorded on the
screen. When applications are complete.
Printer prints results.
Screen Changes ------------ turn over and take a
plane.
Place bearing roller assembly on to the non-slip
plastic bed.
Press Enter.
Now follow on screen instructions.
1: Take a plane on the top of the roller assembly
Inner Ring.
Press Enter.
left, pulling down on the centre probe support arm.
When the probe is in position move switch Z to the
left to lock Probe assembly.

WI-134
INSTRUCTION:
Touching the top of the roller assembly take four
equal readings. The screen will highlight the
number of contacts. When the four
by the screen.
Printer prints of results.
Screen changes to --------- Take a circular from
the inner ring.
Moves switch Z to the left to lock Probe
assembly.
Press Enter.
Screen shows 1-8
Now the machine will check roundness of the
assembly.
Pull down the probe support arm. When in
position move switch Z to the left this will lock
the Probe movement of the Probe assembly.
Now take eight equal measurements by
touching the probe on the inside of the bearing
assembly 12mm down. The applications are
recorded on the screen. When applications are
complete.

WI-134
INSTRUCTION:
2. INNER RING ASSEMBLY 2
Screen Change ---------------Remove No 1
Assembly and place No 2 Inner Ring Assembly
on to the table.
Repeat the above process on the other roller
assembly. Two assembly’s per bearing unit.
When the last of the eight measurements have
been completed on both sides.
Printer Prints the results.
Move switch Z to the Right to Unlock the Probe,
then move Probe assembly out of the way.

WI-134
INSTRUCTION:
3. OUTTER RING (BEARING CASE)
Screen Change ---------------Remove No 2 Roller
Assembly and place Outer Ring (Bearing case)
on to the table.
Screen Changes ------- Take a plane 1-4.
Move switch Z to the right to release the Probe
assembly.
1: Take a plane on the top of the roller assembly
Inner Ring.
Press Enter. 31

WI-134
INSTRUCTION:
left, pulling down on the centre probe support
arm.
Touching the top of the Outer Ring (bearing
case) take four equal readings. The screen will
highlight the number of contacts. When the four
by the screen.
Press Enter.
Printer prints of results.
Screen Changes ---------- Take a circle from
counter bore.
Press Enter.
Screen Changes ------------- 1-8

WI-134
INSTRUCTION:
Move the probe to the inside bore of the Outer
Ring (Bearing Case) and take 8 equal
measurements around the circumference with
the probe at approximately 12mm from the top
of the Outer Ring. Screen confirms number of
applications. On completion of applications.
Press Enter.
Screen changes------------- Take a circle of the
outside diameter.
Press Enter.
Screen changes ---------- 1-8
Move the probe to the outside of the Outer Ring
(Bearing Case) and take 8 equal measurements
around the circumference with the probe at
*28 mm from the top of the Outer Ring (Bearing
Case). Screen confirms number of applications,
on completion of applications.
Press Enter.
Printer records results.
* (28mm depth, Ref. IB/COSUA002 10.2.3 – maximum capability of Mitutoyo)

WI-134
INSTRUCTION:
Screen Changes --------- Turn Outer Ring Over.
Take a plane.
Press enter.
Repeat the above instruction for the Outer Ring.
NOTE: If Any Measurement Errors occur (out of
range), the error is indicated by the Double
Chevron (see right)

WI-134
INSTRUCTION:
4. FRONT ENCLOSURE
Screen Changes ------------ Remove Outer Ring
and place Enclosure ring on to the table, take a
plane.
NOTE: Front enclosure should be paced on a
machine jig to stop the enclosure rocking on the
studs. (new photo will be required).
Press Enter.
Screen changes 1-4.
Touching the top of the Enclosure Ring, take
four equal readings. The screen will highlight
the number of contacts. When the four
by the screen.

WI-134
INSTRUCTION:
Screen Changes. --------- Take a Circle from the
Outside Diameter.
Press Enter.
Screen Changes 1-8
Move the probe to the outside of the Enclosure
Ring and take 8 equal measurements around
the circumference with the probe touching the
enclosure ‘Securing-lip’ any lip. (This measures
lip ware).
The Screen confirms number of applications, on
completion of applications.
Press Enter.

WI-134
INSTRUCTION:
5. REAR ENCLOSURE RING
Screen Changes---------Remove number one
enclosure ring, place number two enclosure on
the table. Take a plane.
Press Enter.
Screen Changes 1-4
(1-3 shown for Timken bearings)
Touching the top of the Enclosure Ring, take
four equal readings. The screen will highlight
the number of contacts. When the four
by the screen.
Screen Changes ---------Take a circle from the
Outside Diameter.
Press Enter.
Printer Records results.

WI-134
INSTRUCTION:
Screen Changes 1-8
Move the probe to the outside of the Enclosure
Ring and take 8 equal measurements around
the circumference with the probe touching the
securing-lip.
(This measures Securing-lip ware). Screen
confirms number of applications, on completion
of applications.

WI-134
INSTRUCTION:
6. BACKING RING
Screen changes--------Remove Enclosure Ring
and place Backing Ring on the table. Take a
plane.
Press Enter.
Screen changes 1-4. Touching the top of the
Backing Ring, take four equal readings. The
screen will highlight the number of contacts.
When the four measurements are taken and
this is confirmed by the screen.

WI-134
INSTRUCTION:
Screen changes
Take a circle from the ID (Inside Diameter).
Press enter.
Screen changes 1-8
Move the probe to just inside of the Backing Ring and take 8 equal measurements around the
circumference with the probe at approximately 5 mm from the top of the Enclosure Ring. Screen
confirms number of applications, on completion of applications.
Screen changes ----end of program
Printer will records all failures in Red. Bearing
can be retested.

WI-134-1A Mitutoyo

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