MIYANAGA
English (World wide)
Customers in North America, please click here.

Combination of this Poly-Clic shank and a cutter allows hole-expanding operations.

CHARACTERISTICS

  • Existing holes can be expanded with ease.
  • You have only to prepare the expanding shank to perform hole-expanding operations, because the cutter used to drill existing holes is used as the guide.

APPLICATIONS

  • To expand pipe-laying holes when replacing air conditioners.
  • To expand pipe-laying holes when replacing pipes in a plant.
  • To expand other holes.

Item Part No.
Expanding shank S
PCSKSEXP250
Expanding shank L
PCSKLEXP250


Item Part No.
Expanding plate S
PCEXPS
Expanding plate L
PCEXPL
Expanding bar
PCSLB250
* If you have an expanding shank S and additionally purchase an expanding plate L, you can replace the plate S with the plate L and use the tool as an expanding shank L. (Likewise, your expanding shank L can be used as an expanding shank S.)

* The tables below serve as a guide for using an expanding cutter of the same type as the cutter used to drill existing holes.
* Use this method to make a ø 70mm (2-3/4") hole from a ø 65mm (2-9/16") hole.

Wooding core bits, ALC core bits

Cutter's nominal diameter
(Existing-hole diameter)
Expanding cutter's nominal diameter
(Target diameter)
22mm (7/8") N/A
25mm (1") 32mm to 220mm (1-1/4" to 8-21/32")
29mm (1-1/8") 35mm to 220mm (1-3/8" to 8-21/32")
32mm (1-1/4") 38mm to 220mm (1-1/2" to 8-21/32")
35mm (1-3/8") 45mm to 220mm (1-3/4" to 8-21/32")
38mm (1-1/2")
45mm (1-3/4") 50mm to 220mm (2" to 8-21/32")
50mm to 220mm (2" to 8-21/32") Existing-hole diameter plus
5mm (3/16") or larger

Rotary core bits (H core), Percussion core bits (S core)

Cutter's nominal diameter
(Existing-hole diameter)
Expanding cutter's nominal diameter
(Target diameter)
22mm (7/8") N/A
25mm (1") 32mm to 220mm (1-1/4" to 8-21/32")
29mm (1-1/8") 35mm to 220mm (1-3/8" to 8-21/32")
32mm (1-1/4") 38mm to 220mm (1-1/2" to 8-21/32")
35mm (1-3/8") 45mm to 220mm (1-3/4" to 8-21/32")
38mm (1-1/2")
45mm (1-3/4") 50mm to 220mm (2" to 8-21/32")
50mm to 220mm (2" to 8-21/32") Existing-hole diameter plus
10mm (3/8") or larger
* The maximum cutter size of the Rotary core bit is 170mm (6-11/16").

Drimond core bits, Drimond core bits for block, Hyperdia core bits

Cutter's nominal diameter
(Existing-hole diameter)
Expanding cutter's nominal diameter
(Target diameter)
25mm (1") 35mm to 220mm (1-3/8" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
29mm (1-1/8") 38mm to 220mm (1-1/2" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
32mm (1-1/4") 45mm to 220mm (1-3/4" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
35mm (1-3/8")
38mm (1-1/2") 50mm to 220mm (2" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
45mm (1-3/4") 55mm to 220mm (2-1/8" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
50mm to 220mm (2" to 8-21/32")
(Up to 310mm (12-13/64")
for the Hyperdia core bits)
Existing-hole diameter plus
10mm (3/8") or larger

  • In the hole-expanding operation, remove the guide cutter immediately after hole starting.
  • Some holes drilled with other manufacturers' cutters cannot be expanded.
  • When expanding the holes drilled with other manufacturers' cutters, "vibrations" and "chatters" may be produced due to a difference in diameter between the hole and guide cutter.
  • This product cannot be used for electric drills having a safety clutch.