Tube Sheets: BT-A

Tube Sheets: BT-A

Code:

0905

The Challenge

The customer manufactures tube sheets made from Titanium (185-190 Bhn) using a horizontal Tarus heavy duty drilling machine operating at 2000 PSI (138 bar) with an oil based coolant. The customer is testing different tooling.

None of these tools were able to complete the operation to the customer requirements. All three tools failed with unacceptable hole straightness and tolerances above 0.017” (0.432 mm), which rendered the tube sheets unusable.

The BT-A Drill met the customer’s needs.

Product:	BT-A
Objective:	Improve process
Industry:	Aerospace
Part:	Tube sheets
Material:	Titanium, 185-10 Bhn
Hole Ø:	0.758" (19.253mm)
Hole Depth:	15" (381mm)

The Solution

The BT-A Drill

BT-A Drill head: 1 series
GEN2 T-A insert: 4C11H-.7580-HE

Measure	Competitor	BT-A
RPM	400	125
Feed Rate	0.005 IPR (0.127 mm/rev)	0.006 IPR (0.152 mm/rev)
Penetration Rate	2.0 IPM (50.8 mm/min)	0.75 IPM (19.05 mm/min)

The Advantages

The BT-A Drill provided:

Necessary hole straightness
Tolerance under 0.017" (0.432mm)