Sunnen GR-2245 User Manual

HOW TO USE
1. Select correct Gage Point (see Table1).
2. Screw correct range Gage Point (G) into gaging
head (see Figure 1).
3. Set gage to desired size, using a ring gage,
micrometer, or Sunnen CF-1000 Dial Bore Gage
Setting Fixture. Set desired size by turning Gage
Point in or out.
NOTE: If gage nest on your CF-1000 Setting Fixture
has vertical dowel pins, you will have to replace it
with a CF-140 Nest Kit (horizontal dowel pins) in
order to use the CF-1000 with the GR-2245 Gage.
4. Lock Gage Point (G) with Locking Nut (C),
using wrench furnished.
5. Recheck "0" setting; reset to "0" if necessary by
loosening bezel screw, rotating indicator dial face,
and tightening bezel screw.
6. Insert gage into bore to be measured and rock as
shown at "E" to obtain minimum reading.
7. To retract centralizer points and indicator point
squeeze Retract Lever (see Figure 2).
HOW TO ADJUST:
Adjust Centralizer Points to Bore Size - If
Points don't touch walls of bore, or if they exert too
much pressure on walls, adjust as follows:
1. Insert gaging head approximately 3/4in. (20 mm)
into bore being measured.
2. Insert 5/64in. Hex Wrench into Centralizer Stop
Adjustment. Rotate Wrench to retract or expand
Points until they barely contact walls of bore (see
Figure 3).
3. Slide gaging head in and out of bore several
times to check adjustment.
NOTE: The closer Centralizer Points are set to bore
size, the easier it will be to insert gage into bore.
Adjust Worn Centralizer Points - When
Centralizer Points must be adjusted because of
excessive wear, be sure to adjust both Points at
same time. Insert 3/32in. Hex Wrench through both
I-GR-2245D
OPERATING INSTRUCTIONS
for
SUNNEN
®
GR-2245 RETRACTABLE DIAL BORE GAGE
DIAMETER RANGE: 2 – 6in. (50 - 150mm)
NOTE: Metric dimensions shown in these instructions are conversion equivalents only . . . items are not
graduated in metric dimensions unless specifically identified as Metric Models.
http://www.sunnen.com
FIGURE 1
FIGURE 3
FOR DIAMETER RANGE
USE GAGE POINT NO. INCHES mm
1 2.000 - 2.375 50 - 60
2 2.375 - 2.750 60 - 70
3 2.750 - 3.125 70 - 79
4 3.125 - 3.500 79 - 89
5 3.500 - 3.875 89 - 98
6 3.875 - 4.250 98 - 108
7 + 2 4.250 - 4.625 108 - 117
7 + 3 4.625 - 5.000 117 - 127
7 + 4 5.000 - 5.375 127 - 137
7 + 5 5.375 - 5.750 137 - 146
7 + 6 5.750 - 6.000 146 - 150
TABLE 1
FIGURE 2 FIGURE 4

Sunnen GR-2245 Specifications

General

Brand	Sunnen
Model	GR-2245
Category	Measuring Instruments
Language	English

Summary

How to Use the Retractable Dial Bore Gage

Select and Install Gage Point

Select the correct Gage Point based on the bore diameter range and screw it into the gaging head.

Set Gage Size and Zero

Set the desired bore size using a ring gage or fixture and recheck/reset the zero setting.

Perform Measurement

Insert the gage into the bore, rock it for the minimum reading, and retract points.

How to Adjust the Bore Gage

Adjust Centralizer Points to Bore Size

Adjust centralizer points to lightly contact bore walls for proper fit and ease of insertion.

Adjust Worn Centralizer Points

Service worn centralizer points by adjusting both simultaneously to ensure wall contact.

Adjust Tension on Centralizer Points

Adjust tension control to ensure centralizer points extend correctly for accurate gaging.

Rotate Gage Point Ball

Rotate the Gage Point Ball to a new position when a flat spot develops for continued accuracy.

Rotate Indicating Finger Ball

Rotate the Indicating Finger Ball to present an unworn surface for precise readings.