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Oprawki do gwintowania

Tap holders




General information

Rule of action

Features and Advantages

Test results

Modern CNC machines have the capability of synchronizing the spindle

rotation to match the feed advance for a specific tap pitch. The «Rigid»

or synchronized tapping cycle is very accurate, but it is impossible to

avoid small discrepancies between the machine synchronization and

the actual pitch of the specific tap being used. Using a rigid tap holder

MasterSYNC means that any deviation at all increases the thrust forces

acting on the tap and this dramatically reduces tap life.

At the heart of

is a precisely machined flexure


which provides axial and radial compensation for the

unavoidable discrepancy between the machine feed advance

and the actual tap pitch. By compensating for this error, the

thrust forces acting on the tap are dramatically reduced. The

result is the longest possible tap life, 100 % improvement or

more, andmuch better quality threads.

By limiting the axial compensation travel, and

torsional forces acting on the flexure, millions of

holes can be tapped without causing the

MasterSYNC holder to fatigue, take a set, or wear


MasterSYNC tap holders have been tested and they

have confirmed the dramatic improvement in tap life, and

thread quality resulting from the reduction of thrust forces

acting on the tap.

The graph to the left is an example of a test using a Kistler

dynamometer to measure the thrust forces during the

tapping process. As you can see from the graph,

although the competitive holders do reduce thrust forces

compared to a rigid tap holder, they are not as effective




- Unique solution


Axial micro compensation

is closely limited

(mechanically secured)

Torque is transmitted

through the drive pins –

not through the flexure.

Unique flexor

increase tap life by 100 % or more

improves thread quality

reduces downtime by lowering frequency of tap replacement

available with high pressure internal coolant system up to 80 bar

Axial compensation +/- 0.5mm

Case study:

Comparison tapping with an M6 spiral fluted tap in 6061 Aluminum to depth of 18 mm.


only for machines with synchronized tapping cycle

Na sztywno

Konkurent 1

Konkurent 2

Master SYNC


Thrust (N)