DORSEY DBL-248 Manual

Item PT. No. Part Name
1 .0001 Indicator
2 120 Indicator Spring
3 110 Indicator Contact
4 104 Indicator Housing
5 305 Screw
6 911 Adapter
7 907 Plunger Rod
8 910 Extension Tube
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. 17) and remove range extension (Det.
18, 19 or 20) from gaging head (Det. 12).
3. Loosen gaging head (Det. 12) from housing assembly (Det.
8). Remove plunger rod (Det. 7).
4. Loosen screw (Det. 22) and remove spring (Det, 21).
5. Loosen cover screw (Det 16) and remove centralizer (Det.
15) from gaging head (Det. 12).
6. Remove retainer (Det. 14), gaging pin (Det.13) and gaging
transfer (Det. 11) from gaging head (Det. 12).
Setting
1. Insert appropriate range extension (Det. 18, 19 or 20) into
gaging head (Det. 12) and adjust range extension to the ap-
proximate desired diameter.
2. Insert gage into reference master (master ring gage or gage
block setup) and adjust range extension until dial indicator
reads zero at first 12 o'clock position. Lock range extension in
place with locknut (Det. 17).
3. Rock gage forward and back in reference master to insure
Dorsey Dial Bore Gage
Model DBL-248
Range .250 - .500
Item PT. No. Part Name
9 Screw
10 1043 Handle
11 908 Transfer
12 901 Gaging Head
13 905 Gaging Pin
14 906 Retainer
15 902 Centralizer
Item
16
17
18
19
20
21
22
zero reading. Adjust indicator bezel to zero if necessary.
4. Repeat Step No. 3
Assembly
1. Insert gaging transfer (Det. 11), gaging pin (Det. 13) and
retainer (Det. 14) into gaging head (Det. 12).
2. Place centralizer (Det. 15) on gaging head (Det. 12) and hold
with cover screw (Det. 16).
3. Insert plunger rod (Det. 7) into gaging head (Det. 12). Place
housing assembly (Det. 8) over plunger rod (Det. 7) and
fasten to gaging head (Det. 12).
4. Insert spring (Det. 21) and lock in place with screw (Det. 22).
5. Insert dial indicator (Det. 1) into indicator housing (Det. 4)
and place onto adapter (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. 17) onto range extension (Det. 18, 19
or 20) and assemble extension to gaging head (Det. 12).
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PT. No. Part Name
904 Cover Screw
912 Extension Nut
909-1 Range Extension
909-2 Range Extension
909-3 Range Extension
903 Spring
913 Screw