Countersink 90°

Best 90 Degree Countersink Suppliers in India

A 90-degree countersink is an HSS cutting tool used to produce a 90° conical recess for countersunk screws and to deburr freshly drilled holes. These tools are available in straight-shank and taper-shank designs, with different cutter diameters, shank sizes, flute configurations, and HSS grades to suit various jobs. We are based in Kolkata and supply 90-degree countersinks across India.

90 Degree Countersinks for Different Industrial Applications

A countersink's conical shape makes it useful for more than just fastener seating. Here's where it typically comes into play:

• Countersunk Screw Seating:

The 90° angle matches standard countersunk screw heads, letting them sit flush with the surface.

• Hole Deburring & Chamfering:

These tools clean up sharp edges left after drilling, giving the hole a smooth chamfered rim.

• Fastener Head Recesses:

Beyond screws, countersinks create recesses for other fastener heads that need to sit below the surface.

• Sheet Metal & Fabricated Components:

Sheet metal work commonly uses countersinks to prepare holes for flush-mounted fasteners.

• Automotive & Engineering Components:

Automotive and general engineering parts often need countersunk holes as part of their assembly design.

• General Tool Room & Maintenance Work:

Tool rooms and maintenance teams keep countersinks handy for repair jobs and one-off fastening needs.

How to Choose the Right 90 Degree Countersink?

Choosing the right countersink drill bit depends on the countersink diameter, screw size, shank size, flute configuration, workpiece material and your machine setup. Working through these before you order helps the recess come out matched to the fastener. Here's what to look at:

• Countersink Diameter and Screw Size:

The diameter should correspond to the head size of the screw or fastener you're seating.

• 90 Degree Cutting Angle:

Confirm the angle matches your fastener's head profile, since a mismatched angle leaves an uneven seat.

• Flute Configuration:

The number of flutes affects cutting action and finish, so choose based on the material and speed you're working with.

• Shank Size and Type:

A straight shank suits standard tool holders, while a taper shank fits direct spindle mounting.

• Workpiece Material:

The material being machined determines the right cutting speed and how the tool wears over time.

• HSS Material and Grade:

The HSS grade affects how the countersink bit performs under repeated cutting cycles.

Why Choose Genuine Enterprises for 90 Degree Countersinks?

For machine shops, fabricators and manufacturers, sourcing 90 degree countersinks comes down to getting the countersink diameter, screw size, cutting angle, flute configuration, shank size and HSS grade right for the fastening work involved. Procurement teams managing bulk or repeat orders also need consistent specifications across every batch, since a shift in diameter or angle changes how the recess seats the fastener.

Our supply reach covers businesses across India. That's what makes us the best countersink drill bit supplier in Kolkata for buyers who need these details matched precisely across every order. Our HSS 90° countersinks are commonly available as straight-shank 3-flute tools to DIN 335C, along with taper-shank variants, with specifications covering countersink diameter, shank diameter, overall length and number of cutting edges.

Frequently Asked Questions

1. What is a 90 degree countersink used for?
It's used to create conical recesses for countersunk screws and to deburr the edges of drilled holes.

2. How do I match the countersink diameter to my screw?
The diameter should correspond to the head size of the screw or fastener being seated.

3. What's the difference between straight-shank and taper-shank countersinks?
A straight shank fits standard tool holders, while a taper shank mounts directly into a machine spindle.

4. What standard do these countersinks follow?
Straight-shank 3-flute HSS countersinks are commonly available to DIN 335C.

5. What flute configuration should I choose?
That depends on the finish you need and the material you're working with, since more flutes generally give a smoother result.

6. Can I order countersink drill bits in bulk?
Yes, we supply these across India, including for bulk and repeat orders once specifications are confirmed.