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RECOMMENDED
TAPPING SPEEDS FOR DIFFRENT MATERIALS
These speeds are approx. and intended as a general guide
only. The most effective speeds sould be determined by
actual test with a given tap, material, machine and tapping
fluid. The taps used should be of High-speed steel.
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Thread
Inches Metric
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1/16
1.7
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3/16
4
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1/4
6
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5/16
8
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3/18
10
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1/2
12
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5/8
16
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Steel
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750
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525
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450
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375
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300
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225
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200
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Cast
Iron
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950
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870
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750
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625
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525
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450
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360
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Brass
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1150
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1000
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900
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750
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650
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540
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450
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Model
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Capacity
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Net
Weight (Kgs.)
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PA1
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3-10
mm
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2.20
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PA2
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6-16
mm
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4.00
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