Internal Recessing Unit

Precision Metal Finishing Tools

The Most Efficient Method Of Machining Internal Grooves In One Operation

The Internal Recessing Unit (IRU), an Elliott Tool Technologies exclusive, is the most advanced and innovative cutting tool.

This tool provides fast, efficient, and consistent machining of internal grooves concentric to bores.

Ellip Deburr
  • Repeatable & Accurate

  • Eliminates Deflection & Chatter

  • Economical & Efficient

  • Easy-To-Use

How the IRU Works

Repeatable & Accurate

• Most efficient method of machining grooves in one operation where close tolerances and finish are critical.
• Repeatable and accurate for diameter and axial position of grooves and lands (+/- 0.002″).

Eliminates Deflection & Chatter

• Designed to support the cutter along its entire length, eliminating deflection and creating precisely machined features.
• Pilots into the bore and provides perfect concentricity. Rigidity and accuracy is assured by strategic location of the cams to support the cutting teeth.

Economical & Efficient

• Quick cycle time – typical cycle time is less than 15 seconds.
• Carbide cutters can be re-sharpened 2-5 times and can also be replaced.

Easy to Use

Only two settings required on the IRU:
• Positional Location (using the tool’s adjustable stop collar)
• Groove Diameter (manual machine – adjust limiting nut; CNC/power fed machine – programmed)

Operation Procedure

1. The IRU is fed into the work-piece at a fast feed rate with the pilot locating within the bore until the nose piece is approximately 0.020” (0.5mm) away from the face of the work-piece.

2. Feed into the work-piece at a cutting feed rate and make contact with the face of work-piece. At this point, the operating head and nose piece are engaged and will stop rotating.

3. Continue feeding forward – causing the system to actuate – lifting the cutter perpendicular to the axis of rotation, machining the internal features in the bore.

4. Retract the IRU three (3) times faster than the cutting feed rate.

5. Once the nose piece is off of the face of the work piece, the cutter has fully retracted back into the pilot and from this point, the IRU can be rapid fed out of the work-piece.