Structural Steel Drilling Product Catalog

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

3 Series: 34.37 mm - 47.82 mm (1.3530" - 1.8829") T-A® Structural Steel Drill Insert Holders

A91

Imperial #4 Taper Shank Holders

Body

Shank

D 1

L 2

L 4

L 3 *

L 1

MT

P 1

P 2

Flute

Length

Part No.

Straight Helical 1.4063 4.441 6.037 6.250 10.912 #4 Standard 1.4063 7.118 7.787 8.000 12.662 #4 24030H-004IS126 * L 3 is 1.60 mm (0.063") shorter if using a structural steel holder with Notch Point®, GEN2 T-A®, or 150° structural steel T-A® drill insert geometry. TTC TSC TTC TSC 22030S-004IS126 Short

Connection Accessories

Nylon Locking Screws 7514N-IP20-1

Admissible Tightening Torque*

Insert Screws 7514-IP20-1

Insert Driver

8IP-20 1370 N-cm (121.3 in-lbs) *Tightening torques are calculated with a friction coefficient of µ = 0.14 and develop 90% of ultimate yield strength. Refer to Speed and Feed charts for recommended adjustments to speeds and feeds. Refer to page A91: 22 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 department : appeng@alliedmachine.com. WARNING

A91: 23 - 24

A91: 19 - 20

Key on A91: 2

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

A91: 21

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