SHERLINE Slitting Saw

P/N 3065


Use of a Slitting Saw

Using the correct cutting speed is an important part of using slitting saws correctly. You must realize that when you exceed the cutting speed with high speed steels, the dulling process can be instantaneous. It isn't you get shorter tool life, you get "no life"! This can be expensive in time and money because slitting saws usually cost so much you don't have spares.

The diameter of a slitting saw is much larger than that of a mill cutter and it has many teeth. This means the speed of the cutting surface will be fairly high even at low RPM compared to an end mill. For example, the Surface Feet per Minute cutting speed (SFM) for high speed steel is about 67 SFM*. For a 2" diameter slitting saw with 110 teeth cutting 12L14 steel, the calculations would be as follows:

RPM = (SFM x 12) (Tool Diameter x  P)

RPM = (67 x 12) (2 x 3.14159), or 804 6.28318

RPM = 128 RPM

*Some sample SFM figures for various materials can be found on page 32 of your Sherline Assembly and Instruction Guide.

Another problem that happens with slitting saws is that one edge gets dull before the other. This causes the blade to deflect as it cuts. How much it deflects is somewhat a function of the blade's thickness.

A common error that can be made is putting a slitting saw on the spindle upside down when they will only cut one way. Look carefully at the direction the teeth are facing.

Coolant should be used. It doesn't have to be flooded, but it should be applied liberally to keep the fine teeth from loading up.

When cutting a slot that goes into a large hole, it is possible to have the part clamp the saw blade as it cuts through and releases stresses in the material. It usually doesn't cause any serious problem. Just stop the spindle and back the blade out.

There is always a question of the best approach to use when cutting a slot with a blade that is less than .060" (1.5mm). You can cut in a series of passes, cut full depth in one pass, or cut straight in. The method to use is up to you, experiment with scrap until you're confident you will not screw up a lot of work.

Joe Martin, President and Owner
Sherline Products

Slitting Saw Holder Parts List

NOTE: Hole size in center of slitting saws held in this holder is 1/2"

NO. REQ.

PART NO.

DESCRIPTION

1

3066

Slitting Saw Body

1

3067

Slitting Saw Cap

1

3088

1/4-20 x 5-1/8" Drawbolt)

1

4067

10-32 x 31/2" Skt Hd Cap Screw

Also check the Cutting Tools and Accessories Price List

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