Stellite Saw Blades - Detailed information

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The tools affect the result of working with Thin cutting frame saws on 99 %. If the machine is in a good technical condition, the result is affected by two main factors:

Choice of a Stellite Saw Blade

Point No.1 - Use the saw blade its length come up to the height wooden block (see schedule No.1). The shorter saw blades are the high accuracy of cut is ensured. Schedule No.1

Cutting Height to 80 mm to 120 mm to 150 mm to 200 mm to 250 mm
Saw Blade Length 380 mm 420 mm 455 mm 505 mm 610 mm

Point No.2 - The thickness of body of the saw blade is depended on the cut height. Schedule No.2

Cutting Height to 80 mm to 120 mm to 150 mm to 200 mm to 250 mm
Body Thickness 0.8 mm 0.8 - 0.9 mm 0.9 mm 0.9 - 1.0 mm 1.1 mm

Point No.3 - The greater cut height = the thicker kerf. Schedule No.3:

Cutting Height to 80 mm to 120 mm to 150 mm to 200 mm to 250 mm
Saw Kerf 1.2 - 1.3 mm 1.25 - 1.35 mm 1.3 - 1.45 mm 1.4 - 1.5 mm 1.5 - 1.7 mm

Point No.4 - Chips, not dust, are created during cutting. The thickness of a chip can be defined by following formulas:

z = 0.6 * (H + h) / t

Calculation of chip thickness:

s = u / n * z

Chip thickness - Schedule No. 4

Chip Thickness 0.15 - 0.25 mm 0.07 - 0.1 mm 0.03 - 0.05 mm
Surface Roughness rough middle fine

Point No.5 - the element limiting the machine performance is a saw blade. If you intend to work using high feed rates and when a rough machining is sufficient for your requirements, apply saw blades of the body thickness greater by a minimum of 0.1 mm than that as stated in Table No.2.

The edge geometry and micro geometry

Edge is the wedge-shaped part of a tool. The main edge - lip - is formed by the tool's face and flank. Penetration of surfaces of the face and flank is called a lip. Penetration of surfaces of the face and flank forms an ideal edge 1. Actual edge 2 is formed by penetration of uneven surfaces of the tool's face and flank. Tool manufacturer's endeavour is to draw the actual edge nearer to the limit of the ideal edge.

Stellite Saw Blades Geometry


Edge dulling

Edge dulling is a gradual change of the edge micro-geometry under cutting process edge ceases to have its cutting ability. Cutting edge life is the period for which the edge retains its capability to cut before a change in the edge shape reaches the determined limit. This limit shows up when tolerance ranges of the cut lamellas are exceeded. The cutting edge life depends on hardness of the material to be cut, on its machining, purity, and humidity. The cutting edge life can be shortened substantially when the feed is too slow, that is, slower than the listed values of thickness for finish-machining see Table No.4 or, on the other hand, when the feed is too fast faster than a chip thickness for rough machining. When this occurs, the saw blade becomes unstable even with its slightest dulling.

Stellite Saw Blades grinding

For grinding we recommend to use the machine CNC Grinder - BPL CNC Type A. Advantage of this machine consists not only in its accurate guidace of the saw blade but also in efficient cooling the blade during its grinding by water emulsion. The saw blades are ground individually one tooth after another. Face and back edge can be ground in one passage through the machine, however, the best results are achieved by first grinding the back edge of the whole ground set of blades, then by grinding the face in another passage through the machine. Recommend values of angles - Schedule No.5:

  g [] a []
Hard Wood 6 - 10 8 - 12
Soft Wood 10 - 15 12 - 17

Angles of the face edge e and e are not ground. These angles are made during the production of saw blades. The value is 2 - 2.5, accuracy ranges in 10.

In the course of grinding process the shape and predetermined angles of the face and back edge must be followed. We do not recommend to change the shape and angles. Unskilled changes in geometry can cause serious damage of the tool.

Stellite Saw Blades rolling

The purpose of rolling of the saw blades is to introduce pre-stressing into the rear part of a saw blade body. When saw blades are being stretched, owing to the rolling process, the stress is transferred to the front tooth part of a blade. Rolling process intensity should be checked using a steel ruler. Due to this rolling process, the rear blade body part is extended so that when the saw blade is put to the ruler, the blade rocks slightly. The rocking displacement ought to be within the range according to the recommended values see Table No.6.

Saw Blade Length 380 mm 420 mm 455 mm 505 mm 610 mm
Difference Y (mm) 0.3 - 0.5 0.4 - 0.6 0.5 - 0.7 0.7 - 0.9 0.8 - 1.0

Stellite Saw Blades Rolling

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