Top Positive Review for Combination Drill on Banggood

Drillpro 6pcs HSS 6542 M3-M10 Combination Drill Titanium Coated Tap Bit Set 1/4 Inch Hexagon Metric Deburr Countersink Bits Screw Thread Metric Tap

40% OFF Drillpro 6pcs HSS 6542 M3-M10 Combination Drill Titanium Coated Tap Bit Set 1/4 Inch Hexagon Metric Deburr Countersink Bits Screw Thread Metric Tap US$5.99 US$9.99 View It

Overall:

DIYSwede 13/04/2019

Excellent value for the low price! These work great if you just respect the following: Don't run at high revs - use a hi-torque cordless with a brake. Repect the short length drill part - don't try to thread anything thicker than the drill's free length. These drill diameters are somewhat small, achieving a really deep thread depth, that'll be tough on the tap, your drill and your wrists (if handheld). I'll personally only use them on cast iron, cast aluminium and mild steel. I'd never ever let the smaller ones bottom out into the purported "deburr/ countersink" feature - jeez - Marketing BS. For heavier alloys I'd still use predrilling to lesser thread percentage and continue using my old straight-fluted taps.

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