Frequently Asked Questions

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How do the tools work?

The primary function of these tools is to deburr the front, rear, or both sides of a drilled hole in a single operation. These tools are designed with a cutting blade which has an extended diameter greater than that of the hole to be deburred. As the tool is fed inward this blade engages the front side of the hole and the burrs are removed. Further feeding causes the blade to retract, against spring pressure, and collapse into a slot in the pilot. This allows the tool to pass through the hole. A radius located on the outermost surface of the blade prevents damage to the inside diameter of the hole. After passing completely through the hole the spring pressure returns the blade to it’s extended position. At this point the tool feed is reversed and the deburring process is repeated on the rear side of the hole as the tool is withdrawn.

Adjustment of the blade elevation changes the tension of the spring action, and affects the amount of chamfer that is cut at the openings of the hole.

What are the benefits of the modular design?

Machine operators love these tools because they are so easy to use. The accountants love them because they lower the cost-per-hole.

Assembly Holder:
Since this component remains in the machine tool holder, axial presets are not necessary after component changes. No more trips to the tool room.

Quick Change Pilot:
Our pilots cost up to 50% less than comparable competitors tools and can be changed out in the machine in seconds.

Quick Change Blade:
Both, blade changes and adjustments, are facilitated with a single screw. The limiting feature allows the blade to be both, changed and preset, in seconds.

What is the purpose of the Retention Screw?

By applying passive radial pressure to the Adjustment Screw, the Retention Screw prevents undesirable changes to the blade setting that is sometimes referred to as “self adjustment” . Please note that THIS IS NOT A LOCK SCREW, and does not need to be altered during normal operation. The tension setting of this screw is set at the factory and should only be “snugged” if the operator notices a lack of tension in the adjustment screw.

What kind of tool life can I expect?

The assembly holder should last indefinitely if treated with care. This means never over tightening any of the screws, especially the pilot clamp screw.

Depending upon the diameter, pilots should last from two to several blade changes. Proper sizing and hole location are the key factors to long pilot life. A tool run in a CNC will last longer than one which is operated by hand.

Several variables will affect blade life. Material, burr size and the amount of chamfer cut, will be the determining factors. As a rule however, I tell my customers that sharp drills are less expensive than deburring tools.

What is the pilot material?

The smaller pilots (ranges A,B&C) are produced from M-2 drill blanks, while the larger pilots are made from hardened H-13 tool steel.

What is the blade material?

The blades are produced from Rockwell 62-64, M-2 high speed steel.

Can the blades be reconditioned?

Yes. Our blades were designed with resharpening in mind. We would be happy to set up a reconditioning program with you.

Do you make custom tools?

Absolutely. Our modular design is very flexible and simple to customize. Whether it’s a longer or shorter pilot, or maybe just a special blade, we can accommodate. We even have a few other tool designs from which we can choose.