MUELLER
®
B-101
TM
and B-100
TM
Drilling and Tapping Machines
Operating Instructions
6
Assemble the Machine
1. Open op valve to its wide open
position by pushing lever handle
down. If desired, handle screw may
be engaged into socket on side of
body to retain op valve in open
position during this operation. (E.)
2. Attach boring bar feed sleeve
assembly to cylinder of machine and
tighten cap securely (2
1
/2 turns).
3. Push boring bar down by hand
until tool contacts pipe.
4. When using B-100 machine,
adjust feed nut and yoke on feed
sleeve and cop so that the yoke
engages thrust collar on boring
bar. When using B-101 machine,
adjust feed nut and yoke in the
same manner and raise the pivot
arm of locking mechanism on side
of yoke so that it is positioned under
the collar, then lock in place with
operating screw and lock nut.
NOTE: Spring loaded detents in
yoke will keep yoke from falling
away from the bar.
5. Push bypass valve to “bypass”
position. Arrow on bypass valve
body indicates valve position (See
Bypass Valve section on page 4).
DRILL AND TAP – Hand
Operated Method
1. Adjust mechanism in handle
so that the boring bar will rotate
clockwise.
NOTE: The standard ratchet
handle length is 18
3
/8”. When
making cuts larger than 1” an
optional handle bar is available
which increases the length to
30
11
/32”.
Attach Tool to Boring Bar
1. Slide knockout pin in boring bar
socket to its outward position using
pin extending through bottom of
boring bar bearing as a handle
2. Insert shank end of combined
drill and tap into boring bar socket
aligning driving pins on tool with
slots in end of boring bar. (C.)
3. Strike tool on drill end with a block
of wood to be sure it ts tightly in
socket.
4. Tighten tool-retaining screw in
boring bar using small socket end
of chain hook nut and tool-retaining
screw wrench. (D.)
5. Retract boring bar to its rear most
position in feed sleeve and cap.
6. Coat drill end and tap threads with
Mueller Cutting Grease. DO NOT
use cutting grease when drilling
and tapping asbestos-cement or
concrete pipe.
2. Drill the main by operating the
ratchet handle clockwise and
turning the feed yoke clockwise
a little at a time. Use a light even
feed at the start. If possible, pull the
ratchet handle in an arc parallel to
the axis of the pipe thereby reducing
the tendency of the machine to slip
on the pipe. Turn the feed yoke as
the boring bar is being turned. (F.)
3. Continue the drilling operation
until the boring bar feeds easily and
rotates easily, indicating the drill
portion of the tool is through the pipe.
4. Rotate ratchet handle clockwise
and rotate feed nut clockwise to
engage tap part of tool into main.
Continue to rotate feed yoke until
tap is securely started into main
and feed yoke is no longer needed
to take thrust of boring bar. At
this point, the feed yoke may be
removed from contact with the
thrust collar and allow the tool to
feed itself. When using the B-101
machine, turn the operating screw
on locking mechanism counter-
clockwise to unlock the pivot arm
and remove the feed yoke from
contact with the thrust collar.
NOTE: Feed yoke should remain
in contact with boring bar thrust
collar and follow the thrust collar
when machine is being used on
high pressure mains, thin wall steel
pipe, or asbestos-cement pipe.
DO NOT overfeed faster than the
tap is cutting because this could
strip the threads being tapped in
the main.
7
C.
D.
E.
F.
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