Be Aware of Burrs with Roll Tapping

The nature of rollform form tapping inherently will cause a bur.  This is due to the fact the rollform tapping forms and displaces material v. cutting out material with cut tapping.  While rollform tapping is a stronger thread than a cut thread, the burs that are produced need to be addressed.  Generally this is done but countersinking the hole so that the burs will not protrude past the top and bottom face of the material.

Another issue that comes up when rollform tapping with In-die tapping is making a clearance hole in the die for the burs from the rollform tapping operation.  If there is not a clearance hole the likely result will be the bur being pushed back into the bottom of the tapped hole.  This will result in having the go gage work to the bottom of the tapped hole and stopping at the last thread. By providing clearance in the die this issue is easily resolved.  

Hutchison Tool introduces HTS Models 3000, 3100, 6000, 6100

Hutchison Tool introduces HTS Models 3000, 3100, 6000, 6100

We are pleased to announce the latest In-die tapping heads with the introduction of the HTS Models 3000, 3100, 6000 and 6100.    These new units encompass several new features while maintaining a large tapping capacity (#2-56 to ½-13 or M2 to M12) and a quick change tap assembly that allows taps to be changed in the press in under a minute.  The following are some of the new features:

• Multiple mounting options for improved press accessibility
• Enhanced Lead Screw/Tap Collet Design
• Adjustable Coolant Ring
• Unique Bill of Material Parts List for each unit(including multi-spindle units)
• One year/One Million Stroke Limited Warranty

To learn more please visit our website at www.hutchisontool.com.  The website has a library of information including CAD files, tapped hole size guide, pricing and a tapping calculator to help determine press stroke requirements and production speeds

Be Aware of Burs with Roll Tapping

The nature of rollform form tapping inherently will cause a bur.  This is due to the fact the rollform tapping forms and displaces material v. cutting out material with cut tapping.  While rollform tapping is a stronger thread than a cut thread, the burs that are produced need to be addressed.  Generally this is done but countersinking the hole so that the burs will not protrude past the top and bottom face of the material.

Another issue that comes up when rollform tapping with In-die tapping is making a clearance hole in the die for the burs from the rollform tapping operation.  If there is not a clearance hole the likely result will be the bur being pushed back into the bottom of the tapped hole.  This will result in having the go gage work to the bottom of the tapped hole and stopping at the last thread. By providing clearance in the die this issue is easily resolved.