Alco F Type Heads Dimensions & Capacities

Metric threads. Thread rolls are made to cover the following ranges.

A12=14mm*

A23=19mm*

A3=24mm*

A34=24mm*

*Maximum thread length including runout

The A233400 is a fine threading head for large diameters. Thread diameters up to 26mm are restricted to 67 mm thread length including runout. Thread diameters over 26mm are restricted to 24mm thread length including runout.

Note:- Runout refers to lead on the rolls. See Thread rolls technical information.

UNC Threads. Thread rolls are made to cover the following ranges.

A3=24mm*

*Maximum thread length including runout

UNF/UNEF threads. Thread rolls are made to cover the following ranges.

A12=14mm*

A34=24mm*

*Maximum thread length including runout

The A233400 is a fine threading head for large diameters. Thread diameters up to 26mm are restricted to 67mm thread length including runout. Thread diameters over 26mm are restricted to 24mm thread length including runout.

A23=*19mm

*Maximum thread length including runout.

The A233400 is a fine threading head for large diameters. Threading diameters up to 26mm are restricted to 67mm thread length including runout. Thread diameters over 25mm are restricted to 24mm thread length including runout.

Roll sets are also available for BSF and BSW threads, generally equivalent to the UNF and UNC threads listed. As these threads are obsolescent they are not normally stocked but can be produced in around 7 working days, please enquire. Similarly BA, BSCY, UNJ etc. threads can be produced and the rolls supplied.

If you want to produce any thread not listed in the tables above please call us to check that you have the required head. Most Alco heads can be used for knurling. Again, please enquire.