165mm Long Drill Bits | McMaster-Carr

Extended Length—Drill through panels and thick workpieces with our longest bits. Their length is good for creating deep holes but makes them less rigid than other bits. As a result, they are more prone to wobbling or breaking, especially when drilling hard materials.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		Each
Extended Length







				Black Oxide

				8.5	0.3346"	165	109	Round	8.5 mm	Standard	88455A124	000000




						Uncoated

						8.0	0.315"	165	92.7	Round	8 mm	Standard	3083A176	00000


						8.5	0.3346"	165	91.7	Round	8.5 mm	Standard	3083A178	00000

Carbide-Tipped Drill Bits

Jobbers' Length

Round Shank

Extended Length

Round Shank


Standard	Split

Performance similar to solid carbide but at a lower price point. Like carbide bits, these are stronger than cobalt and high-speed steel and maintain their sharp edges when drilling abrasive material. However, when drilling tough metals like iron and hardened steel, upgrade to carbide for longer life.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

					Shank
	Drill Bit Size, mm	Decimal Size Equiv.	Overall Lg., mm	Max. Drilling Dp., mm	Type	Size	Drill Bit Point Type		Each
Jobbers' Length







				Uncoated

				13.0	0.5118"	165	114	Round	13 mm	Split	28595A49	0000000


				14.0	0.5512"	165	122	Round	14 mm	Split	28595A95	000000
				15.0	0.5906"	165	132	Round	15 mm	Standard	28595A16	000000
				15.0	0.5906"	165	132	Round	15 mm	Split	28595A96	000000


				Extended Length







								Uncoated

								8.5	0.3346"	165	86	Round	8.5 mm	Standard	29465A117	00000