Drill & Tap Combination

Taps are designed with cutting teeth and either helical or straight flutes for the passage of chips and the admission of cutting fluid. The purpose of cutting internal threads is so that they can receive a part with an external thread, such as a bolt, rod, or fastener. These two parts can then be joined together. Taps can be made out of different types of steel and can be engineered for different applications.

Drill & Tap Combinations Drill and Tap in a Single Operation

Anatomy & Nomenclature

The SHANK fits into the tap holder. The SQUARE at the end of the tap drives and rotates the tap. FLATS are the sides of the square at the end of the shank.
The FLUTES are grooves that provide a path for the removal of chips and the flow of cutting fluid.
The POINT controls the ejection of chips*
*Spiral Point Taps AKA "Gun Taps" are ideal for through-hole applications.
The NECK enables the flow of lubricant and deeper tapping.
The CHAMFER aligns the tap and provides easy starting.

How to Tap The Right Size Hole

A screw or fastener will only fit properly into a threaded hole if:

The hole was drilled to the proper diameter and
The hole was properly tapped

Consult your tap/drill chart to determine the correct diameter drill.

Drill Diameter Options for ¼-20 Thread (see highlight on the chart) ¼-20

Tap Drill Size 9 | 7 | 13/64”
Prob % of Thread 77 | 70 |66

#7 drill will yield a 70% of thread
#9 drill (smaller) will yield a smaller hole-tap will work harder. You will achieve a higher % of thread (77%) but tap life will be shortened
13/64” drill (larger) will result in less thread engagement (66%)

<div itemscope itemtype="https://schema.org/FAQPage"> <h2 style="font-size:17px;color:#1A3865">Troubleshooting Tap Drill</h2> <div itemscope itemprop="mainEntity" itemtype="https://schema.org/Question"> <p itemprop="name"><strong>Tap Teeth Chipping</strong></p> <div itemscope itemprop="acceptedAnswer" itemtype="https://schema.org/Answer"> <div itemprop="text"> <p>Incorrect hole size, or tap hitting bottom of the hole</p> <p><strong>Remedy</p> - Consult a tap/drill chart to drill the correct hole size. Reduce the travel of the tap or drill a deeper hole to allow clearance in the hole depth.</p> </div> </div> <br><br> <div itemscope itemprop="mainEntity" itemtype="https://schema.org/Question"> <p itemprop="name"><strong>Excessive Rate of Wear</strong></p> <div itemscope itemprop="acceptedAnswer" itemtype="https://schema.org/Answer"> <div itemprop="text"> <p>Incorrect hole size, tapping speed too high, or lack of lubricant</p> <p><strong>Remedy</p> - Consult a tap/drill chart to drill the correct hole size. Select the correct tapping speed for the material and tap type and use proper lubricant.</p> </div> </div> <br><br> <div itemscope itemprop="mainEntity" itemtype="https://schema.org/Question"> <p itemprop="name"><strong>Tap Breakage</strong></p> <div itemscope itemprop="acceptedAnswer" itemtype="https://schema.org/Answer"> <div itemprop="text"> <p>Misalignment or incorrect hole sizee</p> <p><strong>Remedy</p> - Align tap with alignment tool or self-guiding tapping machine. Consult a tap/drill chart to drill the correct hole size.</p> </div> </div> </div>

Drill & Tap Combination, Square Shank, DT22 Series

Metric Drill & Tap Combination, Square Shank, DT22M Series

Titanium Nitride Coated Drill & Tap Combination, Square Shank, DT22T Series

Heavy Duty Drill & Tap Combination, Hex Shank, DT22HEX Series

SKU	Product Type	Drill Diameter	Tap Size	Drill Length	Thread Length	Overall Length	Pieces Per Unit	Price
CHA DT22-4-40	Combination Tap & Drill	.0910	4-40	1/4	3/8"	1-7/8	1/EA	$40.35
CHA DT22-4-48	Combination Tap & Drill	.0945	4-48	1/4	3/8"	1-7/8	1/EA	$43.40
CHA DT22-5-40	Combination Tap & Drill	.1040	5-40	9/32	13/32"	1-15/16	1/EA	$40.35
CHA DT22-5-44	Combination Tap & Drill	.1060	5-44	9/32	13/32"	1-15/16	1/EA	$43.40
CHA DT22-6-32	Combination Tap & Drill	.1115	6-32	5/16	7/16"	2	1/EA	$40.35
CHA DT22-6-40	Combination Tap & Drill	.1170	6-40	5/16	7/16"	2	1/EA	$43.40
CHA DT22-8-32	Combination Tap & Drill	.1375	8-32	3/8	1/2"	2-1/8	1/EA	$40.35
CHA DT22-8-36	Combination Tap & Drill	.1405	8-36	3/8	1/2"	2-1/8	1/EA	$43.40
CHA DT22-10-24	Combination Tap & Drill	.1545	10-24	13/32	5/8"	2-3/8	1/EA	$40.35
CHA DT22-10-32	Combination Tap & Drill	.1635	10-32	13/32	5/8"	2-3/8	1/EA	$43.40
CHA DT22-12-24	Combination Tap & Drill	.1805	12-24	15/32	21/32"	2-3/8	1/EA	$40.35
CHA DT22-12-28	Combination Tap & Drill	.1860	12-28	15/32	21/32"	2-3/8	1/EA	$43.40
CHA DT22-1/4-20	Combination Tap & Drill	.2080	1/4-20	17/32	25/32"	2-1/2	1/EA	$44.60
CHA DT22-1/4-28	Combination Tap & Drill	.2220	1/4-28	17/32	25/32"	2-1/2	1/EA	$44.60
CHA DT22-5/16-18	Combination Tap & Drill	.2660	5/16-18	11/16	15/16"	2-27/32	1/EA	$61.95

Displaying 15 of 22 Products

SKU	Product Type	Pieces Per Unit	Price
CHA DT22HEX-1/2-13-IPAC	Combination Tap & Drill	1/EA	$30.85
CHA DT22HEX-1/2-20-IPAC	Combination Tap & Drill	1/EA	$31.75
CHA DT22HEX-1/4-20-IPAC	Combination Tap & Drill	1/EA	$19.30
CHA DT22HEX-1/4-28-IPAC	Combination Tap & Drill	1/EA	$19.85
CHA DT22HEX-10-24-IPAC	Combination Tap & Drill	1/EA	$19.30
CHA DT22HEX-10-32-IPAC	Combination Tap & Drill	1/EA	$19.85
CHA DT22HEX-12-24-IPAC	Combination Tap & Drill	1/EA	$19.30
CHA DT22HEX-3/8-16-IPAC	Combination Tap & Drill	1/EA	$26.10
CHA DT22HEX-3/8-24-IPAC	Combination Tap & Drill	1/EA	$26.10
CHA DT22HEX-5/16-18-IPAC	Combination Tap & Drill	1/EA	$24.20
CHA DT22HEX-5/16-24-IPAC	Combination Tap & Drill	1/EA	$24.20
CHA DT22HEX-7/16-14-IPAC	Combination Tap & Drill	1/EA	$28.65
CHA DT22HEX-7/16-20-IPAC	Combination Tap & Drill	1/EA	$28.65
CHA DT22HEX-8-32-IPAC	Combination Tap & Drill	1/EA	$19.30
CHA DT22HEX-M10X1.5-IPAC	Combination Tap & Drill	1/EA	$26.10

Displaying 15 of 24 Products