Deburring main bores with cross holes

Heule Tool's new SNAP-X deburring line for cross-hole deburring of main bores with multiple cross bores. SNAP-X deburrs intersecting cross bores at different diameters and angles directly through the main bore in one pass. With two cutting blades that work in both directions, it provides forward and backward cutting. 

The company says that a special guiding edge and gliding section prevent damage to the main bore during operation. Blades can be swapped by hand quickly and without tools, keeping downtime to a minimum. 

Each SNAP-X is custom-engineered and built for each customer’s specific application. SNAP-X is suited for high-volume production runs requiring deburring main bores with multiple intersecting cross bores of different diameters and angles (up to nearly a 1:1 ratio), on applications like drive shafts, transmission components, and other precision machined parts requiring consistent deburring quality.  

The company says the technology features a simple design with few components and a single screw. The radially supported and spring-loaded blade penetrates the cross bore in work feed and deburrs it, regardless of the diameter of the cross bore. Blades, which can be changed by hand with no tools, work in forward or reverse when the spindle rotation is reversed. The guiding edge of the SNAP-X blade moves it back into the tool body when exiting the cross bore, protecting the main bore.

The tool blade is positioned in rapid feed in front of the cross bore to be deburred. In work feed forward and with work speed, the edges of the intersection are machined. With clockwise rotation all intersecting bores are deburred in a single pass. The spindle rotation is reversed, machining the cross bores a second time as the tool exists the main bore.

The tool body shows a recess in the feed direction. This prevents the burrs from being pushed down or bent into the cross bore in advance.

Extra long tools are usually assembled (multi-piece construction) and require an adequate guidance in the main bore direction as well as a generously dimensioned chamfer. It is strongly recommended not to activate the tool without guidance.