If you need a true 1-1/2-inch countersink bit, the ACTOOL HSS model is the closest match in this selection. It has a 1-1/2-inch cutting diameter, a 90-degree angle, and a 3/4-inch Weldon shank for magnetic drills. The other picks are 1-inch alternatives: choose the Accusize or HHIP 3-flute model for 82-degree work, the HHIP single-flute model for smaller holes, or Vouyar for a cobalt-steel option. Check diameter, angle, and shank before ordering; these specifications determine whether a bit suits your setup and fastener.
| Product | Cutting diameter | Angle | Best suited for |
|---|---|---|---|
| ACTOOL HSS | 1-1/2 inches | 90 degrees | Magnetic drills and larger chamfers |
| Accusize HSS | 1 inch | 82 degrees | Magnetic drills and general-purpose work |
| HHIP 3-Flute HSS | 1 inch | 82 degrees | Smoother, accurate countersinking |
| HHIP Single-Flute HSS | 1 inch | 82 degrees | Smaller holes and portable work |
| Vouyar Cobalt Steel | 1 inch | 90 degrees | Harder metals and round-shank setups |
ACTOOL 1-1/2-Inch HSS Countersink
This is the direct size match for a search for a 1-1/2-inch countersink bit. ACTOOL lists a 1-1/2-inch diameter, a 90-degree angle, and a 3/4-inch Weldon shank. The product is intended for countersinking, chamfering, and deburring with magnetic drills, and its shank is described as suitable for standard magnetic drills.
Best for: Buyers who need a 1-1/2-inch cutter for magnetic-drill work. Its stated diameter and Weldon shank make it the most directly relevant selection. Limitation: It is a 90-degree tool, not an 82-degree option, and the Weldon shank is intended for compatible equipment rather than every drill chuck.
Accusize 1-Inch 82-Degree HSS
Accusize is a smaller alternative if a 1-inch cutter is sufficient. Its HSS construction is specified for general-purpose use on ferrous and nonferrous materials. The 82-degree included angle is described as a 41-degree angle per side, and the 3/4-inch Weldon shank is designed for most magnetic drilling machines and related drill-press attachments.
Best for: Buyers who need an 82-degree countersink for magnetic-drill applications. Choose it over the ACTOOL when the angle matters more than the larger cutter diameter. Limitation: Its 1-inch diameter does not meet a requirement for a 1-1/2-inch cutter.
HHIP 1-Inch 82-Degree 3-Flute
This HHIP bit has a 1-inch cutter, an 82-degree angle, and three flutes. The listed design aims to reduce chatter and produce smoother cuts, with the manufacturer describing it as more accurate than a single-flute countersink for critical tasks.
Best for: Users comparing 1-inch options who prioritize a multi-flute design and consistent countersinking. It may suit jobs where finish and accuracy are important. Limitation: The listed features do not specify a shank size, so confirm fit with the intended tool before purchase. It is also smaller than a true 1-1/2-inch bit.
HHIP 1-Inch Single-Flute Countersink
This HSS model has a 1-inch cutter, an 82-degree angle, a 1/8-inch tip, a 1/2-inch shank, and a 2-3/4-inch overall length. Its single-flute design is described as useful for clean cutting, deburring, chamfering, and chip evacuation. The product information also highlights portable machine work and smaller holes.
Best for: Buyers who need a single-flute 82-degree tool for smaller holes or portable work and want the stated shank dimensions. Limitation: The 1-inch cutter is not a substitute for the ACTOOL’s 1-1/2-inch capacity.
Vouyar 1-Inch Cobalt-Steel 90-Degree Bit
Vouyar offers a 1-inch, 90-degree countersink made from M35 cobalt steel, with an additional cobalt coating. Its product details describe the material as intended to improve cutting and thermal performance when working with harder materials such as stainless steel and nickel alloys. It has a 12 mm round shank.
Best for: Buyers seeking a cobalt-steel alternative for hard-metal work who have a compatible round-shank setup. Limitation: It is 1 inch rather than 1-1/2 inches, and the listed features do not provide a Weldon shank.
Buying Guide: How to Choose a Countersink Bit
Do you need a 1-1/2-inch cutter?
Match the cutting diameter to the job’s required countersink size. Of these five products, only the ACTOOL is listed with a 1-1/2-inch diameter. The other four have 1-inch cutters, so treat them as alternatives only when the smaller size is appropriate.
Which angle should you choose?
The listed options include 82-degree and 90-degree designs. The angle should match the fastener head or chamfer specification. Do not assume these angles are interchangeable: confirm the required included angle before selecting a bit.
Does the shank fit your machine?
Check the tool holder as carefully as the cutter diameter. ACTOOL and Accusize list 3/4-inch Weldon shanks for magnetic drills. The HHIP single-flute model lists a 1/2-inch shank, while Vouyar lists a 12 mm round shank. The HHIP 3-flute listing does not specify its shank dimensions in the provided features.
When does flute design or material matter?
A single flute can suit smaller holes and chip evacuation, while HHIP describes its three-flute design as intended to reduce chatter. For harder metals, Vouyar specifies cobalt steel and a cobalt coating. Select based on the material and finish needs stated for the job, rather than assuming one design works best for every application.
Frequently Asked Questions
Which listed bit is actually 1-1/2 inches?
The ACTOOL HSS countersink is listed with a 1-1/2-inch cutting diameter. The other products in this comparison are 1-inch options.
Is the ACTOOL bit an 82-degree countersink?
No. Its listed angle is 90 degrees. Choose an 82-degree model if that is the angle required for the fastener or job.
Can I use a Weldon-shank bit in any drill?
Not necessarily. The ACTOOL and Accusize listings specify 3/4-inch Weldon shanks for magnetic-drill applications. Check that the machine or attachment accepts that shank type and size.
Which option lists a single-flute design?
The HHIP 1-inch, 82-degree HSS model is the single-flute option. Its listing also specifies a 1/2-inch shank and a 1/8-inch tip.
Which product lists cobalt steel?
Vouyar lists an M35 cobalt-steel body and cobalt coating. Its stated cutting diameter is 1 inch, not 1-1/2 inches.