Page 310 - Tungaloy Catalog

Clamping Mechanism & Features of TAC Internal Toolholders

Shank material

Steel Shank Carbide Shank

d Economical. d Finishing accuracy is good with excellent
d Min. bore dia: ø.177 in ~ 2.5 in. resistance to chatter.
d Screw-on, clamp-on, pin-lock & double d Screw-on & clamp-on types (min. bore dia:
clamping types are stocked. ø.177 in ~ 1.34 in) are standard stocked.
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Clamping system TAC Internal Toolholders

S A

Double
Screw-on clamping
d Simple clamping mechanism. d Increased clamping rigidity contributes to superior
d Smart shape without overhang area. cutting edge positioning accuracy & longer tool life.
d Minimum bore diameter: ø.177 in. d Enlarged insert holding area of the clamp allows more
d Good cutting action by using positive inserts. accurate cutting edge positioning. It delivers high
d Carbide shanks that have excellent resistance to performance even when using VNMG type (35° corner
chatter. angle) inserts, which tend to destabilize cutting edge
d “Tsuppari-Ichiban” shanks (reinforced with carbide positioning.
plates) are also stocked. d Simple structure keeps cost low. Easy clamping with
only one wrench.
P C M
Multi
Lever-lock Clamp-on clamping

d Clamp-on type insert locking d Combination of lock-pin & top
d Negative rake, lever-lock type, mechanism assures secure
round shank boring bars. clamp provides positive insert
holding & accurate indexing.
d The insert is positively held into d For inserts without a hole, it holding & superior indexing
a two wall pocket, excelling in provides stronger cutting edge accuracy.
indexing accuracy. strength than S-type tools & can d Suitable for medium to large
d Minimum bore diameter: ø.737 in. withstand heavier cutting diameter boring.
d “Tsuppari-Ichiban” shanks that are d Minimum bore diameter: ø1.25 in.
reinforced with carbide plates are conditions.
also stocked.

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