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HSS Parting Tool Bits

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HSS Rectangular Tool Bits

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HSS Square Tool Bits

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HSS Round Tool Bits

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A tool bit is a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool, as distinguished from other cutting tools such as a saw or water jet cutter. The cutting edge is ground to suit a particular machining operation and may be resharpened or reshaped as needed. The ground tool bit is held rigidly by a tool holder while it is cutting.


Square Tool Bits

The square tool bits we offer are designed for perfection and are appreciated for the durability, sturdy construction and reliability. These square tool bits are fabricated using qualitative raw material procured from reliable vendors. These are offered in varied sizes such as:
• 1/4x3"
• 5/16x3"
• 3/8x3"
• 1/2x4"
• 5/8x6"
• 3/4x6"
• 1"x6"


Parting Tools Bits

We manufacture and export an assortment of parting tools bits that are designed with precision. These parting tools bits are offered is various specifications in terms of sizes. The available sizes are as follows:
• 3/32" x 1/2" x 4"
• 3/32" x 5/8" x 5"
• 1/8" x 3/4" x 6"
• 1/8" x 7/8" x 6"
• 3/16" x 1" x 6"


Round HSS Cutting Tools

We manufacture and export a wide assortment of round HSS cutting tools that have gained huge popularity in the market for their host of qualitative features. The entire range is available in various specifications that can be customized as per clients’ specifications. These are widely accepted in various industries and the sizes up to 40 MM. we offer are as follows:


Rectangular HSS Cutting Tools

Our range of rectangular HSS cutting tools is manufactured using premium grade raw material procured from certified vendors. Owing to their durability and high performance, these cutting tools have gained huge repute in the market. The entire assortment is available in the following sizes:
• 1/8" x 3/4" x 6"
• 3/8" x 5/8" x 8"
• 5/16" x 3/4" x 6"
• 3/8" x 3/4" x 6"
• 5/16" x 3/4" x 8"
• 3/8" x 3/4" x 8"
• 3/8" x 1/2" x 4"
• 3/8"x1"x6"
• 3/8" x 1/2" x 6"
• 3/8" x 1" x 8"
• 3/8" x 1/2" x 8"
• 1/2" x 5/8" x 6"
• 3/8" x 5/8" x 6"
• 1/2" x 5/8" x 8"


Back Rake is to help control the direction of the chip, which naturally curves into the work due to the difference in length from the outer and inner parts of the cut. It also helps counteract the pressure against the tool from the work by pulling the tool into the work.

Side Rake along with back rake controls the chip flow and partly counteracts the resistance of the work to the movement of the cutter and can be optimized to suit the particular material being cut. Brass for example requires a back and side rake of 0 degrees while aluminum uses a back rake of 35 degrees and a side rake of 15 degrees.

Nose Radius makes the finish of the cut smoother as it can overlap the previous cut and eliminate the peaks and valleys that a pointed tool produces. Having a radius also strengthens the tip, a sharp point being quite fragile.

All the other angles are for clearance in order that no part of the tool besides the actual cutting edge can touch the work. The front clearance angle is usually 8 degrees while the side clearance angle is 10-15 degrees and partly depends on the rate of feed expected.

Minimum angles which do the job required are advisable because the tool gets weaker as the edge gets keener due to the lessening support behind the edge and the reduced ability to absorb heat generated by cutting.

The Rake angles on the top of the tool need not be precise in order to cut but to cut efficiently there will be an optimum angle for back and side rake.



Originally, all tool bits were made of high carbon tool steels with the appropriate hardening and tempering Since the introductions of high-speed steel (HSS) (early years of the 20th century), sintered carbide (1930s), ceramic and diamond cutters, those materials have gradually replaced the earlier kinds of tool steel in almost all cutting applications. Most tool bits today are made of HSS, cobalt steel, or carbide.

Carbides and ceramics

Carbide, ceramics (such as cubic boron nitride) and diamond, having higher hardness than HSS, all allow faster material removal than HSS in most cases. Because these materials are more expensive and brittler than steel, typically the body of the cutting tool is made of steel, and a small cutting edge made of the harder material is attached. The cutting edge is usually either screwed or clamped on (in this case it is called an insert), or brazed on to a steel shank (this is usually only done for carbide).

Tool Bit Selection

Obtaining the best results starts with selecting or determining which tool bit to use with the material being cut. Tri Tool has three basic cutting edge geometry's which function well on most of the common tubing materials. In addition to variations in the edge geometry, tool bits are made available from M-42 tool steel, variations in height and combinations of all three as shown in the accompanying table. Selections of the tool bits should be based on tubing material, how critical it is to have a neat burr-free end and tubing size.
Our Major Brands of Tool bits are:

Miranda Tool bits