I've read and read all the posts on here about rigid tapping and it's supposed to be so easy. I don't see why i have such problems. Here's the scenario:
- 2008 Haas VF-2 w/ Rigid Tapping Option
-Tension Compression Tap Holder ("Command" mfg C4T4-0001 model #)
- Using Spiral Fluted 6-32 Bottoming Taps
- Tap Drill #36 per tap drill charts (maybe I need to go bigger?)
- Blaser 4000 coolant @ 8% on the Brix scale
- Depth of #36 Hole 0.6", Depth of Tap 0.2" - yes that's 0.4" of spacing for the bottoming tap to have PLENTY of room before it hits bottom!
- Material 6061-T6 Aluminum 3/8" thick Plate
- RPM is 1000, Feed is 31.25 for the rigid tapping (mastercam X2 MR2 SP1)
I break a tap about every 4 holes..:drowning:
Tell me I'm crazy but this should be working every time right?
Before I drill the #36 tap drill hole should I be using a center drill to start the hole out right for the #36? Maybe the #36 drill is wandering and causes the 6-32 to bend too much?
Is the tension compression tap holder hurting me here or should I just get a rigid tap holder?
Should I just forget the cutting taps and do a forming tap? will that solve all my woes?
Should I be doing any countersinking on the hole before tapping?
any ideas?
cheers,
Paul