Jet Tools VBS-3612 operating instructions Set, Material, Blade Breakage

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Variable-tooth blades combine features of the other styles. They generally offer smooth cuts and long blade life, while reducing noise and vibration.

Set

The term “set” refers to the way in which the saw teeth are bent or positioned. Bending the teeth creates a kerf that is wider than the back of the blade.

Set patterns are usually selected depending upon the type of material that needs to be cut. Three common set patterns are shown in Figure 25.

The Regular, or Raker, set is generally furnished on blades which have 2 to 24 teeth per inch. These blades have one tooth set to left, one to right, and one unset tooth called a raker. The raker set is often used for contour cutting.

The Wave set is generally furnished on blades which have 8 to 32 teeth per inch. This set has groups of teeth bent alternately to left and right, which reduces the strain on individual teeth. Blades with a wave set are used where tooth breakage is a problem, such as in cutting thin stock or where a variety of work is cut without changing blades; also when the thickness of the workpiece changes, such as cutting hollow tubing or structurals.

The Straight set has teeth in a consistent, alternating pattern, which is good for fast, basic cuts where a fine finish is not important. This set is also popular for cutting wood and plastics.

Material

Some of the most common blade materials include:

Carbon Steel Blade – widely used because of its general adaptability for all types of work and for its lower cost. Excellent for cutting nonferrous metals and plastics.

High Speed Steel Blade – resists heat generated while cutting to a far greater extent than carbon steel blades. Best suited for cutting nonferrous metals.

Carbide-Tipped Blade – Best used for cutting titanium, beryllium, and case hardened materials.

Figure 25

Blade Breakage

Band saw blades are subject to high stresses and breakage may sometimes be unavoidable. However, many factors can be controlled to help prevent most blade breakage. Here are some common causes for breakage:

1.Misalignment of the blade guides.

2.Feeding workpiece too quickly.

3.Using a wide blade to cut a short radius curve.

4.Excessive tension.

5.Teeth are dull or improperly set.

6.Upper guides are set too high off the workpiece.

7.Faulty weld on blade.

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Contents Inch Metalworking Band Saw More Information Warranty and ServiceTable of Contents Page Page Introduction Specifications Features and Terminology Unpacking Contents of the Shipping ContainerFence Installation and AssemblyFeed Screw ShearVolt, Three Phase Operation Grounding InstructionsExtension cords Converting from 230 Volt to 460 Volt Three Phase AdjustmentsThree-Phase Test Run Blade Removal and InstallationBlade Tracking Blade TensionBlade Guides Guide PostSquaring Work Table with Blade Auxiliary TableReplacing Drive Belts Setting Blade Speed Blade Break-In ProcedureBand Saw Operation Work Lamp BulbWelder Operation Evaluating Cutting EfficiencyShearing Welding Removing TeethAnnealing Width Blade SelectionGage PitchShape Set MaterialBlade Breakage Machine Part Lubricant Frequency MaintenanceSpeed and Pitch Chart Typical Band Saw Operations Troubleshooting Operating Problems Troubleshooting Mechanical and Electrical Problems Trouble Probable Cause Remedy Troubleshooting Welded Blade Inspection Replacement Parts Troubleshooting Welder Mechanical ProblemsIndex No. Part No Description Size Qty TS-0561021 TS-0051051 VBS3612-1174 TS-0267061 VBS-3612 Band Saw VBS-3612 Band Saw JWG34-601 PR-EV-6280 Welder, Shear and Work Lamp Assemblies Electrical Connections 3Ph, 230/460V SB1 Electrical Box Page WMH Tool Group