XEBEC Brush™ Crosshole Extra-Long

*This is a special order item. Please contact us for the details.

*The Brush size is approximate as the tip expands by rotating.

The Brush will break off when

○ rotated beyond the maximum rotational speed

○ used with a pneumatic tool

○ rotated outside the cylinder (outside workpiece)

In the following cases, the Brush may break off

○ off -center cross hole and angled cross hole

○ if the cross hole diameter is equal to or greater than the main bore diameter in case of T-shaped cross hole

○ if the cross hole diameter is more than 70% of the main bore diameter in case of cross-shaped

XEBEC Brush Crosshole Extra-Long consists of Brush, Collar (resin) and Shank.
Collar will be made according to the hole diameter.
Please fill out the information sheet below and send it to us.
We will contact you and let you know if we are able to meet your request.

Download information sheet

Generally, the usage method is same as XEBEC Brush Crosshole, however the difference from XEBEC Brush Crosshole is that Collar must be attached to prevent deflection.
Also, always make sure to use the tool in a state where Collar is stored inside the workpiece.
XEBEC Brush Crosshole Extra-Long is suitable for a bore depth up to 370mm when chucking allowance is 30mm.
Full length of the tool is 400mm for a red brush (A12) and 410mm for a blue brush (A33).
XEBEC Brush Crosshole Extra-Long is a customized item.
The shank and the brush part are separate items and the shank part can be reusable.

The tool can be mounted on equipment which can control rotational speed. The tool must be rotated over 8,000min-1.
The tool can be used on a machining center, combined lathe, robot, and special machine.

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.)

Use a full-cover type machine tool. Breakage 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.

Recommended rotational speed is different depending on brush diameter.
See the recommended rotational speed and the target bore diameter shown below.

A uniform deburring and edge quality can be achieved by rotating the tool in both clockwise and counter-clockwise directions.
Start the feed rate from 300mm/min.