Dissassembly
1. Loosen two (2) screws (Det. 5) and remove indicator housing
(Det. 4) from adapter (Det. 6). Remove dial indicator (Det. 1)
from indicator housing (Det. 4).
2. Loosen locknut (Det. 19) with wrench (Det. 20) and remove
range extension (Det. 16, 17 or 18) from gaging head (Det.
12).
3. Loosen two (2) screws (Det. 9) and remove spring (Det. 8).
4. Loosen two (2) screws (Det. 10) and disengage housing as-
sembly (Det. 6). Remove plunger rod (Det. 7).
5. Remove centralizer (Det. 11) from gaging head (Det. 12).
6. Remove retainer (Det. 15) from gaging head (Det. 12). Re-
move gaging pin (Det. 14) and gaging transfer (Det. 13).
Setting
1. Insert appropriate range extension (Det. 16, 17 or 18) into
gaging head (Det. 12) and adjust range extension to the ap-
proximate desired diameter.
2. Insert gage into reference master (master ring gage, bore
gage setmaster or gage block setup) and adjust range exten-
sion until dial indicator reads zero at first 12 o’clock position.
Lock range extension in place with locknut (Det. 19).
3. Rock gage forward and back in reference master to insure
zero reading. Adjust indicator bezel to zero if necessary.
4. Repeat Step No. 3
Assembly
1. Insert gaging pin (Det. 14), gaging transfer (Det. 13) and
retainer (Det. 15) into gaging head (Det. 12).
2. Place centralizer (Det. 11) over gaging head (Det. 12).
3. Insert plunger rod (Det. 7) into gaging head (Det. 12). Place
housing assembly (Det. 6) over plunger rod (Det. 7) onto
gaging head (Det. 12) and lock in place with two (2) screws
(Det. 10).
4. Insert spring (Det. 8) and lock in place with two (2)screws
(Det. 9).
5. Insert dial indicator (Det. 1) into indicator housing (Det. 4)
and place onto housing assembly (Det. 6). Lock in place with
two (2) screws (Det. 5) insuring proper contact of indicator
with plunger rod (Det. 7).
6. Thread lock nut (Det. 19) onto range extension (Det. 16, 17
or 18) and assemble extension to gaging head (Det. 12).
Dorsey Dial Bore Gage
Model DBL-998
Range 1.00 - 1.50
Item
PT. No.
Part Name
Item
PT. No.
Part Name
Item
PT. No.
Part Name
1
.0001 Indicator
8
1150
Spring
15
1122
Retainer
2
120
Indicator Spring
9
Screw
16
1114-1 Range Extension
3
110
Indicator Contact
10
Screw
17
1114-2 Range Extension
4
104
Indicator Housing
11
1102
Centralizer
18
1114-3 Range Extension
5
Screw
12
1110
Gaging Head
19
1113
Extension nut
6
1145
Housing Assembly
13
1120
Transfer
20
1160
Wrench
7
1147
Plunger Rod
14
1130
Gaging Pin
tel: 845-454-3111
www.dorseymetrology.com
