KEENTECH Carbide-Tipped Annular Cutter 7/8 in x 1-3/8 in - Faster Cuts

In this review the KEENTECH Carbide-Tipped Annular Cutter is evaluated for machine shops and fabricators who need fast, durable holemaking in hard metals. The bottom line: this 7/8 in by 1-3/8 in annular cutter stands out because of its Advanced PVD Nano-Coating, which cuts cooler and lasts far longer than uncoated tools, making it a practical choice for repetitive, heavy-duty drilling where clean edges and tool life matter most.

Key Features

• Advanced PVD Nano-Coating: A CrAlTiSiXN 3-micron layer reduces friction for smoother, faster cutting and increases cutting speed by about 50 percent while preserving finish.
• Extended Tool Life: The PVD coating improves wear resistance so the cutter can last up to ten times longer under heavy use, reducing downtime and replacement costs.
• Better Heat Resistance: The coating maintains cutter edge hardness at high temperatures, allowing higher speed drilling into tough alloys with less loss of sharpness.
• Clean & Crisp Cutting: The cutter produces fewer surface defects and a finer hole finish than uncoated TCT or HSS alternatives, useful for precision work.
• Weldon Shank Fit: The 3/4 in Weldon shank with two flats aligns securely in mag drill chucks to prevent slippage and keep cuts steady.

Who It's For

The KEENTECH annular cutter is aimed at professional metalworkers, maintenance technicians, and small production shops that run magnetic drills for steel fabrication, structural work, or tooling where repeated, accurate holes are required. It is particularly suitable for operations that demand higher throughput and less frequent tool changes thanks to the coating.

Less appropriate for occasional DIY users who rarely drill hard metals, since the benefits of the PVD coating and the Weldon shank are most valuable under frequent, heavy workloads; hobbyists may prefer a simpler, lower-cost uncoated cutter.

Pros & Cons

Pros

• Significantly reduced friction and faster cutting speeds due to the PVD nano-coating.
• Improved wear and heat resistance extends service life for heavy-duty jobs.
• Produces cleaner holes with better surface finish compared with uncoated options.

Cons

• Higher upfront cost than uncoated TCT or HSS cutters, which may not justify itself for infrequent users.

Specifications

Brand	KEENTECH
Cutting Diameter	7/8 in
Cutting Depth	1-3/8 in
Shank Type	3/4 in Weldon shank (two flats)
Coating	CrAlTiSiXN PVD nano-coating, ~3 micron
Intended Use	Mag drill annular cutter for hard metals and heavy-duty machining

Our Verdict

The KEENTECH 7/8 in x 1-3/8 in annular cutter is a solid investment for professional users who need faster, cleaner holes and much longer tool life under heavy use. Its PVD nano-coating and sturdy Weldon shank deliver reliable performance and good value for shops that prioritize throughput and reduced tool change frequency.

Frequently Asked Questions

How should the cutter be installed?
Align the two flats of the Weldon shank with the two screw holes, then tighten the mag drill screws to ensure stable cutting.

What coolant should be used?
Use a recommended cutting fluid rather than water to reduce wear and extend tool life.

Can it cut titanium or high-temperature alloys?
Yes, the PVD coating improves heat resistance so it is suitable for machining tougher alloys at higher speeds when proper feeds and coolant are used.