NARGESA BM25, Manual

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VERTICAL BROACHER BM25
Piston up
Piston down
Piston
2nd operation 1st operation
3rd operation
(A) Bushing
(B) Thick
(C) Broach
(D) Piece
5.3. Samples to make a correct broaching operation
1 - Place the piece in the middle of the table.
2 - Insert the bushing.
3 - Place the broach in the bushing, lubricate abundantly in order to achieve a perfect broaching opeartion,
especially during the first operation.
4 - Get the piston down from 20 to 40 mm until having the broach inserted in the bushing, then slightly raise
up the piston so the broach recovers its vertical position and then repeat the same procedure 2 or 3 times
until the broach overtakes the piece and it could be taken by the down part of the piece.
5 - It will be necessary to gradually insert 1, 2 or 3 thick parts depending on the broachsince these are the
ones that give the exact depth.
6 - Clean up all steel wool from the broach once the broaching operation is finished (it is very important for
the broach not to be broken).
7 - Causes of an incorrect broaching.
- The use of oil in bad conditions.
- Do not place the broach in vertical position.
- Do not intercalate the piston thrust.
Depending on the carve depth, request 6. TABLE OF CHARACTERISTICS OF BRUSHES