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SFT Syn<strong>ch</strong>roFlex-tap <strong>ch</strong>ucks<br />
Highest thread quality with Syn<strong>ch</strong>roFlex-tap <strong>ch</strong>ucks<br />
General information<br />
On today‘s CNC ma<strong>ch</strong>ining centres, spindle rotation can be syn<strong>ch</strong>ronized<br />
with the spindle feed (Rigid Tapping). However, experience shows<br />
that small errors in syn<strong>ch</strong>ronization can occur. These differences are<br />
minimal, but lead to increased tool wear.<br />
Independent test by tap manufacturer<br />
Thrust test 10 holes, M6 R45-AL, 2 Flute tap (3XD), AL7075 at 1000 RPM.<br />
Graph illustrates the final hole tapped by ea<strong>ch</strong> tap driver.<br />
SFT Syn<strong>ch</strong>roFlex-tap <strong>ch</strong>ucks<br />
By using the Syn<strong>ch</strong>roFlex tap<br />
holder with axial and radial movement,<br />
any difference in feed and<br />
spindle speed are compensated.<br />
The patented micro compensator<br />
(Flexure) cushions the differences,<br />
reducing pressure on the tap.<br />
A max. 0.5 mm deflection is<br />
constant throughout the life of the<br />
tapping unit, therefore enhancing<br />
tap life and quality of the thread.<br />
Thrust<br />
(N)<br />
210<br />
180<br />
150<br />
120<br />
90<br />
60<br />
30<br />
SFT100<br />
SFT10<br />
SFT75<br />
SFT50<br />
Thrust (N)<br />
0,1 0,2 0,3 0,4 0,5<br />
Deflection (mm)<br />
Tapmatic SFT50<br />
Competitor 1<br />
Depth<br />
Competitor 2<br />
Rigid Tap Holder<br />
Evaluation of economic efficiency<br />
Case history:<br />
Application<br />
Thread cutting on a horizontal ma<strong>ch</strong>ining centre with<br />
Fanuc control, rigid tapping.<br />
Costs<br />
Syn<strong>ch</strong>roFlex<br />
<strong>ch</strong>uck<br />
Number of threads / year 50’000 50’000<br />
Number of threads / tap 2’400 1’000<br />
Number of taps / year 21 50<br />
Price / tap in 19 19<br />
Tap costs in 396 950<br />
Chuck costs in (approx.) 450 300<br />
Total costs in / year 846 1’250<br />
Cost reduction in / year 404<br />
Collet <strong>ch</strong>uck<br />
without<br />
compensation<br />
Material<br />
42CrMo4V steel, heat treated to 650 N/mm2<br />
Tap size<br />
M8 x 1, metric fine<br />
Thread<br />
M8 x 1, 10 mm deep, through hole<br />
Speed<br />
500 RPM, Coolant: oil emulsion 6%<br />
Results<br />
Tap held in collet <strong>ch</strong>uck: the tap needed to be replaced after<br />
1‘000 components completed<br />
Total cost /year<br />
Saving Tap<br />
Tap<br />
Syn<strong>ch</strong>roFlex<br />
Collet <strong>ch</strong>uck<br />
Break Even Point<br />
Collets <strong>ch</strong>uck<br />
Syn<strong>ch</strong>roFlex<br />
Improvement with TAPMATIC<br />
With the new TAPMATIC SFT50 <strong>ch</strong>uck, tap life has been increased to<br />
between 2‘400 and 2‘900 components tapped before the tap needed<br />
to be <strong>ch</strong>anged.<br />
Advantage<br />
Besides cost savings (increase of tap life by 150%), knowing that<br />
all holes have been tapped during an unmanned shift.<br />
Results<br />
Conclusion<br />
n Increase of tap life 100% or more<br />
n Investment in a Syn<strong>ch</strong>roflex tap holder can be recovered<br />
in a matter of a few weeks<br />
n Less downtime (increase of production capacity)<br />
n Better thread quality<br />
n Increased process reliability due to less tap breakage<br />
By using Syn<strong>ch</strong>roFlex <strong>ch</strong>ucks quality threads and economic<br />
manufacture are guaranteed.<br />
12 TAPMATIC
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