A91-SSD_ESM

DRILLING | Structural Steel Solutions | T-A® and GEN2 T-A® Replaceable Insert Drills

2

T-A® Structural Steel Drill Insert Holders 2 Series | Taper Shank

A

L 1

DRILLING

L 4

P 2

D 1

L 2

P 1

MT

L 3 *

B

Helical Flute #3 Morse Taper

Body

Shank

BORING

D 1

L 2

L 4

L 3 *

L 1

MT

P 1

P 2

Series Length

Part No.

25020H-003IS100

2 Extended 1.0000

7.142

9.412

9.563

13.287

#3

TTC

TSC

2 Extended 25020H-003IS100 * L 3 is 0.063" (1.60 mm) shorter if using a structural steel holder with Notch Point®, GEN2 T-A®, or 150° structural steel T-A® drill insert geometry. 25.4 181.41 239.06 242.9 337.49 #3 TTC TSC

C

Helical Flute #4 Morse Taper

Body

Shank

REAMING

D 1

L 2

L 4

L 3 *

L 1

MT

P 1

P 2

Series Length

Part No.

24020H-004IS100 25020H-004IS100 26020H-004IS100 24025H-004IS112 24020H-004IS100 25020H-004IS100 26020H-004IS100

Standard 1.0000 Extended 1.0000

5.855 6.772 6.772 5.855

6.574 9.355

6.725 9.506

11.449 14.230 20.946 11.449 290.80 361.44 532.03 290.80

#4 #4 #4 #4 #4 #4 #4 #4

TTC TTC TTC TTC TTC TTC TTC TTC

TSC TSC TSC TSC TSC TSC TSC TSC

2

Long

1.0000

16.071

16.222

2.5 Standard 1.1875

6.574

6.725

Standard 25.40 Extended 25.40

148.72 172.01 172.01 148.72

166.98 237.62 408.20 166.98

170.82 241.45 412.04 170.82

2

D

Long

25.40

2.5 Standard 30.16 24025H-004IS112 * L 3 is 0.063" (1.60 mm) shorter if using a structural steel holder with Notch Point®, GEN2 T-A®, or 150° structural steel T-A® drill insert geometry.

BURNISHING

E

THREADING

A91: 5

A91: 14 - 15

X

Key on A91: 1

Screws sold in multiples of 10. = Imperial (in) = Metric (mm)

SPECIALS

Refer to Speed and Feed charts for recommended adjustments to speeds and feeds. Refer to page A91: 21 for deep hole drilling guidelines in this section of the catalog. Visit www.alliedmachine.com/DeepHoleGuidelines for the most up-to-date information and procedures. Factory technical assistance is available for your specific applications through our Application Engineering Team. ext: 7611 | email: appeng@alliedmachine.com WARNING

www.alliedmachine.com | 1.330.343.4283

A91: 17