HOZAN C-405, Instruction Manual

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Apply a liberal amount of superior quality
cutting oil to each tap. While depressing
lightly at right angles to the bottom bracket,
turn tap driver R counterclockwise and tap
driver L clockwise so that they bite a few
threads.
Then, turn each tap driver in the
appropriate direction just until resistance
is felt.
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If it is hard to turn tap drivers, try again after
reversing handles 1/4 turn and cleaning
scraps. Add oil if necessary.
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Correcting threads is completed when the
thickest portion of the tap, which exactly
corrects the threads, passes the point in the
bracket of minimum insertion of the bottom
bracket cup.
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Treads
of the cup
Operation
Secure the frame to be corrected in the
work stand or the bench vise.
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１ １
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Thread tap driver R from right side of the
frame (gear crank side) and tap driver L
from left side into the bottom bracket
shell.
Then, engage the tap drivers with each
other.
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If you feel resistance in turning, the tap is going to cut a new thread even the existing
thread has been corrected. In case of this, do not continue turning the handle by force.
Then lubricate and reverse the handle to attach the bottom bracket cup as a trial. This
bracket tap cannot newly cut threads. Do not try to cut threads by force. Otherwise, this
could damage the bottom bracket shell and the tap.
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Caution
Always use both tap drivers R and L. Otherwise, the threads could be damaged.
Engaging the two tap drivers produces a single axis.
Especially be careful of turning direction : tap driver R counterclockwise, and tap driver
L clockwise. This is opposite the direction of the spinning wheel when the bicycle is
going forward.
When processing bottom brackets based upon Italian standard, unlike JIS size, turn the
both of left and right tap drivers clockwise to the operator.
Frequently lubricate to complete the work. Otherwise, clogging cut scraps or sticking
could damage the bottom bracket shell and the tap
.
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Caution