AGAM Technical Catalog

Agam Technical Catalog

AGAM Technical Catalog Online Edition

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Tapping Tapping Overview Tapping // 6695 Business Parkway Elkridge, MD 21075 USA 1.410.796.6400 tel 1.800.645.0854 tel 1.410.796.0589 fax 1.800.348.2426 fax E9 © Copyright 1998-2019 Agam Group, Ltd. All Rights Reserved, ATC-V09-E1-ENG (2019.01) Pitch Drill Size Size of Screw Note: In the metric system, the size of the drill is equal to the diameter of the screw minus the pitch of the screw. For instance, a tap M10 x 1.5 (1.5 indicates the pitch) has a 10 mm diameter, a 1.5 mm pitch, and requires an 8.5 mm drill. [10 mm tap - 1.5 mm pitch = 8.5 mm drill]. For a 1:1 drill/tap chart, see page J1.4. For screws, see pages J2.1 - J2.6. Drill Tap Reference Number Description Reference Number Description Overview Although AGAM can perform tapping in all systems, most tapping is done using the metric system. Under this process, the pitch of the screw is the distance between two threads. The drill size is equal to the screw size minus the pitch. Screw sizes and their corresponding drill and tap areas are shown below: Tap M4 x 7 Tap, M4 x .7 Tap M5 x .8 Tap, M5 x .8 Tap M6 x 1 Tap, M6 x 1 N.A. N.A. Tap M8 x 1.25 Tap, M8 x .1.25 N.A. N.A. Tap M10 x 1.5 Tap M10 x 1.5 N.A. N.A. Tap 1/4 x 20 Tap, 1/4" 20 Drill 3.3 mm 3.3 mm Drill Drill 4.2 mm 4.2 mm Drill Drill 5 mm 5.0 mm Drill Drill 6 mm 6.0 mm Drill Drill 6.75 mm 6.75 mm Drill Drill 8 mm 8.0 mm Drill Drill 8.5 mm 8.5 mm Drill Drill 10 mm 10.0 mm Drill Drill #7 No. 7 Drill View Machine Video Additional Media: View Website Page

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