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General Information:

Toolholder Setup     Insert Setup     Maintenance     Coolant

     Troubleshooting     Materials and Coatings 

Application Specific Information:

Grooving     Face Grooving     Boring & Turning     Threading     Parting

Mounting the Tool on the Turret or Tool Post

The tool must be positioned accurately on the turret or tool post to function properly. 
Assure that the following conditions are met:

Position the insert perpendicular to the work surface you are preparing to cut.  Maximum deviation for misalignment should be within .001" T.I.V. (Total Indicator Variation) per inch of toolholder length.

Assure that the cutting edge of the tool is at the appropriate work piece centerline cutting height. Refer to the applications listed above for centerline recommendations.

Keep tool overhang to a minimum. For best results, hold the tool extension ratio to 1:1 or less. Example for 1/2" square steel bar: Hold unsupported length of bar to 1/2" or less. Maximum extension ratio for steel bars is 4:1. Heavy Metal bars (A high-density tungsten based alloy) may be used up to a 6:1 ratio and Carbide up to 8:1.

Rule of Thumb: The longer the extension ratio, the more likely chatter, vibration and problematic tool deflection will occur.

Tip: If your set-up uses set screw clamping, place a length of 1/16" to 1/8" thick flat stock on the surface between the toolholder and screws to eliminate the top surface damage associated with this type of clamping. If you choose to clamp with the screws directly on the toolholder, do not use cup point set screws as they will severely damage the surface of the toolholder which may make re-mounting the toolholder more difficult next time.

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Clamping the Insert in the Toolholder

The insert must be positioned accurately and securely in the toolholder to cut properly.
Assure that the following conditions are met:

  Assure that the insert pocket and seat is undamaged and free of chips or other particles.

  Slide the insert gently into place making sure proper alignment is made on the bottom, side and end surfaces where applicable.

  Assure that the clamp is in proper alignment and in position to securely hold the insert in the pocket or seat.

  Use sensible force when tightening the clamp screw. Do not over tighten as this may damage the screw, insert or toolholder.

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Tool Maintenance

  Periodically check the toolholder, clamp and screw for signs of wear. Thinbit® toolholders are made from premium tool steel and are hardened and ground to give superior wear and accuracy. However, with use, all tooling will experience wear.

  Always check for damage after a "bump" or "crash". Check insert seat or pocket and clamp for signs of skived or displaced material. Tools will not perform satisfactorily if not in good condition. If any damage is evident, replace the toolholder or clamp.

Tip: Order extra clamps, screws & stop pins so that they will be available when needed. 

  Stop pins:  many Thinbit® toolholders utilize stop pins to control the extension of the cutting insert. If a tool experiences a significant impact, these stop pins are designed to shear which may minimize damage to the tool. Broken stop pins may be readily drilled out by using a progressive series of drill diameters. Example: Remove a 1/16" diameter stop pin by drilling first with a #60 drill, followed by #56, #54 and finally a 1/16" drill. When removed, gently press or tap a new pin in place.

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Coolants

  Thinbit®  inserts are compatible with all coolants.  Most inserts perform better when flooded with coolant.

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