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MARYLAND METRICS
DTFLOCK Taps
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On the following pages you will find information about DTFLOCK Taps / Gages.
1. Tap Materials: High Speed Steel (HSS), Carbide 2. Tap Classes, Characteristics and Specifications. Table 1: Tap Types, Characteristics and Specifications |
| Types | Series number | Characteristics | Size Range metric | Size Range inch |
| General Purpose Tap | series number R620-GPT | ■ Standard shape of taps. ■ Used for nuts, through holes or blind holes. | M5-M200 | 10-32 to 6 "- 4 |
| Fast Spiral Fluted Tap | series number R620-FST | ■ Deep Holes (cutting chips going up) ■ Cutting speed 30 ~ 50% higher than standard taps. ■ Larger flutes and sharper cutting edges. Used for non-ferrous metals. | M5-M200 | 10-32 to 6 "- 4 |
| General Spiral Fluted Tap | series number R620-GST | ■ Used for ferrous metals ■ Chips going up. Used for deep holes. | M5-M200 | 10-32 to 6 "- 4 |
| Spiral Point Tap | series number R620-SPT | ■ Has a spiral point on top of the flutes. Cutting chips going down. Used for through holes. ■ Sharp cutting front with higher cutting speed. | M5-M200 | 10-32 to 6 "- 4 |
| Cold Forming Tap | series number R620-CFT | ■ Generate threads by cold forming instead of cutting. ■ Require small tolerance for the holes ■ Used for the material easy to reform. | M5-M12 | 10-32 ~ 1/2-20 |
| Interrupted Tooth Tap | series number R620-ITT | ■ Along the spiral line, the cutting teeth is missing for every other tooth. This type of tap construction can be made for every other type of taps. ■ Special material, such as aluminum, copper, titanium alloy, etc. ■ Deep holes or larger cutting torque ■ Larger pitch | M5-M200 | 10-32 to 6 "- 4 |
How to order: R620-DTFLOCK series number - size - material Example: R620-GPT-M20
Note: standard material is HSS and does not need to be called out.
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