XEBEC Brush™ Crosshole Extra-Long


XEBEC Brush Crosshole Extra-Long

XEBEC Brush Crosshole Extra-Long is suitable for the hole depth over 140mm up to 1000mm.

The basic usage method is same as XEBEC Brush Crosshole, however the difference from XEBEC Brush Crosshole is that a resin collar must be attached to prevent deflection. Also, always make sure to use the tool in a state where the resin collar is stored inside the workpiece.




Product code Brush
Brush diameter a Collar diameter b Shank diameter c Spanner width d Full length   Permissible tightning force
CH-A12-3F Red φ3mm φ4.8~φ7.8mm φ4mm 3.2mm
CH-A12-5F Red φ5mm φ7.8~φ9.8mm φ6mm 5mm 170~1000mm  1.5~3.0Nm
CH-A12-7F Red φ7mm φ9.8~φ19.8mm φ8mm 6mm 170~1000mm  2.7~5.4Nm
CH-A12-11F Red φ11mm φ13.8~φ19.8mm φ12mm 10mm 170~1000mm  9.5~19Nm
CH-A33-3F Blue φ3mm φ4.8~φ7.8mm φ4mm 3.2mm 180~1000mm  0.4~0.8Nm
CH-A33-5F Blue φ5mm φ7.8~φ9.8mm φ6mm 5mm 180~1000mm   1.5~3.0Nm
CH-A33-7F Blue φ7mm φ9.8~φ13.8mm φ8mm 6mm 180~1000mm   2.7~5.4Nm
CH-A33-11F Blue φ11mm φ13.8~φ19.8mm φ12mm 10mm 180~1000mm   9.5~19Nm

Tool schematic

 Brush part is replaceable and shank part can be reused.

Processing conditions

Product code Target primary processing hole Brush diameter a Recommended rotation speed Maximum rotation speed
CH-A12-3F φ5~8mm φ3mm 7,000~10,000min-1 12,000min-1 
CH-A12-5F φ8~10mm φ5mm 8,000~10,000min-1 12,000min-1
CH-A12-7F φ10~14mm φ7mm 7,000~9,000min-1 12,000min-1
CH-A12-11F φ14~20mm φ11mm 6,000~7,500min-1 12,000min-1
CH-A33-3F φ5~8mm φ3mm 7,500~9,000min-1 12,000min-1
CH-A33-5F φ8~10mm φ5mm 7,500~8,000min-1 12,000min-1
CH-A33-7F φ10~14mm φ7mm 6,500~8,000min-1 12,000min-1
CH-A33-11F φ14~20mm φ11mm 6,500~8,000min-1 12,000min-1


  • Attach the collar to the shank and thrust in the brush holder to the shank. Make sure to insert the brush holder all the way to the end (there should be no gap between the contacting surfaces). Use two wrenches to securely tighten and fix it with the permissible tightening force shown in the table above.
  • After fixing it, check that there is no gap between the contacting surfaces of the brush holder and shank. Make sure that the collar rotates with ease. Otherwise, disassemble and clean the tool because foreign materials may have entered.


  • Select a collar with diameter that is around 0.2mm to 0.3mm smaller than the inner diameter of the target hole.
  • The collar is an expendable product that wears down. When the tool's rotational vibration becomes large, replace it with a new one (periodic replacement or replacement at the same time as brush is recommended). 
  •  Collar may wear out faster where the inner peripheral surface of the primary processing hole is rough. Replace the collar to a new one when the amount of wear reaches dia. 0.5mm.
  •  Once the deflection of the tip of the tool exceeds 0.5mm, stop using it and replace it with a new shank (periodic replacement is recommended). (It is very dangerous to use the tool when the deflection exceeds 0.5mm because there is a risk that the shank will break and scatter.)

Precautions in use

  • Use a full-cover type machine tool. Beakage of the bristles or shank will result in scattered pieces, which cause a severe risk.
  • Select a tool size that corresponds to the target hole diameter. Selecting the wrong tool size poses a risk of breakage, deformation or damage of the bristles and/or shank.
  • Make sure to insert the part from the tool tip to the collar into the target workpiece before rotating the tool. Rotating the tool in air causes risk of damage or scattering of the bristles and/or shank.

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