Tag Archives: #SawBlades
Reciprocating Saws
Back in 1951, The Milwaukee Electric Tool Corp manufactured the first reciprocating saw and is commonly referred to as a Sawzall. The Sawzall has a long D-shaped handle and requires both hands to operate. It weighs around 10 lbs, which helps to minimize vibration and provide improved grip. The Sawzall normally has a variable speed trigger and/or controller for simple change of speed if needed. The term reciprocating saw (oscillating saw) applies to any saw that cuts using a back & forth motion. These include the jigsaw, the scroll saw, the saber saw, and the rotary reciprocating saw. The reciprocating saw operates using different blade types: bi-metal, …
HEM Saw H130 Bandsaw Machines
Gerald R. Harris founded HE & M, Inc. (HEM) in 1964. For fifty years, HEM Saw has maintained its reputation as the manufacturer of quality and durable bandsaw machines. HEM Saw remains a leader in the bandsaw industry, consistently setting the standard with more patented innovations than any other bandsaw manufacturer in the world. HEM manufactures more than 70 different models of production bandsaw. One of their most successful achievements is the H130 Series bandsaw machine. The cutting capacity for this series ranges from 16” x 16” W to 10” x 20” W when cutting shapes. All three use a 10hp motor with 2hp hydraulics. …
Saw Blade Back and Gullet Cracks
Bandsaw owners and operators will encounter saw blade back and gullet cracks and might wonder why, or think that it is simply a low quality blade. Yet, being economical doesn’t necessarily mean that the blade is the problem. At Sawblade.com, we offer some of the lowest saw blade and parts prices in the industry. This does not mean that we carry inferior stock, or that our blades are not engineered to the highest industry specifications. In many cases, the common problems resulting in gullet and back cracks often range from crooked welds to bandsaw blade breakage. Problems will also occur when …
Vickers Hardness Scale
The Rockwell hardness test measures materials hardness based on the net increase in depth of impression as a load is applied. Hardness numbers have no units, and the higher the number in each of the scales, the harder the material. In the Rockwell method of hardness testing, the depth of penetration of an indenter under certain arbitrary test conditions is determined. Hardness is defined as resistance to local penetration, scratching, machining, wear or abrasion, and yielding. The multiplicity of definitions, and corresponding multiplicity of hardness measuring instruments, together with the lack of a fundamental definition indicate that hardness may not be …
Sharpening Saw Blades
Sharpening bandsaw blades is a widely known and acceptable practice in both metal and wood cutting industries. It is applied, however, and almost exclusively, to the woodworking set. A primary problem encountered in the woodworking shop is dull saw blades. Objects encountered while cutting wood include nails, bullets, and other similar materials, all of which will help to dull a saw blade. These extractions from green wood cause damage on the edges of sharp teeth. Dull blade teeth aren’t useful and shouldn’t be utilized. Buying a new saw blade is an option, and so is sharpening the dull blade. There are two ways to …
Bandsaw Newbie-Refresher Course
A preventive safety course for bandsaw operators new to the machines as well as for those quite familiar with them. All bandsaw operators should possess adequate knowledge of mechanics, materials, and most important — safety — prior to any cutting procedure. Lack of experience combined with lack of knowledge will jeopardize not only the materials but the machine and worse, the machine operator. Every bandsaw machine offers various operating features, and before using any particular machine, it is important to be familiar and possess a minimum of confidence prior to operating. Aside from possessing thirty+ years of experience in a variety of shops and …
Feed and Speed Rate Factors
Running saw blades at the correct feed and speed rates is important if the goal is to achieve desirable output. There is an optimum balance between blade speed and feed rate for every saw blade and every material to be cut. Proper adjustment of feed and speed rates will help to maximized blade life and assure a satisfactory cut. Feed rate is determined by the bandsaw, material size and shape, guide spacing, cutting fluid, and tooth size and shape. The greater the blade speed, the greater the feed rate — up to the limits imposed by the above-mentioned production factors. Blade Speed Bandsaw …
