Pencil Mill Chucks- Features/Specifications
- Pencil Mill Chucks with BT Shank
- Pencil Mill Chucks with
National Standard Taper - Pencil Mill Chucks with
Straight Shank - Pencil Mill Collets
- Standard Sets of Straight Shank
Pencil Mill Chucks - << Previous page
Since small diameter end mills(especially made of solid carbide) are easy to break during working, they are required to be highly precise in the chucking. The pencil mill chuck is an end mill holder specially developed to ensure this ultra high precision chucking for small end mills, attaining an incomparable high accuracy in the chucking.
High precision Runout within 8μ
Adopting the drawback collet, even the standard type guarantees the runout accuracy of
within 8μ at 25mm distance from the holder's
head.
Super precision type (Special specification) Runout within 5μ
Super precision type guarantees the runout
accuracy to be within 5μ at 25mm distance
from the holder's head. For the super precision
type, please order the holder with the collet
having been set in together.
Method to secure a stable high precision
The conventional method to chuck the tool by
the drawback type collet is to screw-in the threaded draw-bar which will also cause twisting of
the collet and, accordingly, deteriorate the
accuracy. The pencil mill chuck draws the collet
straight without screwing the draw-bar without
the collet being twisted, which will keep the
accuracy to be stable.
How to set the collet and tool
1)Hold the square part of the collet's end and
insert the collet into the holder.
2)Insert the tool into this collet and turn the lock
nut in CW direction by hand to be locked.
3)Tighten the lock nut with a spanner.
(The spanner is a special accessory.)
Can be used for a high speed cutting
Since each part of the pencil mill chuck is precisely made and is assembled well balanced, the chuck can be used for a precision cutting work without vibration even over 20,000min-1 of high speed cutting.
Easy tool chucking
The tool can be chucked easily only by tightening the lock nut in CW direction. The tool change as well as the collet change can be done only from holder's head end.
Slim head
he pencil mill chucks have two types. One is
PCH6 for collet capa. of 3, 4 and 6mm, the
other is PCH10 for collet capa. of 3, 4, 6, 8,
and 10mm. Head diameter of PCH6 is 17mm
and that of PCH10 is 23mm. These slim heads
will prevent unnecessary collision with the
workpiece and enable the tip of the end mill
well visible, all of which will eventually
improve the operation efficiency.
Spanners (Separate accessory)
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