2. Band Saw 2015

3. Band Saw

4. The idea of the band saw dates back to at least 1809, when William Newberry received a British patent for the idea, but band saws remained impractical largely because of the blades. Constant flexing of the band saw blade over the band saw wheels caused the material or the welded joint of the blade to fail. Nearly 40 years passed before a French woman, Anne Paulin Crepin, devised a technique for welding a band saw blade so that it could withstand the rigors of sawing and bending around band saw wheels. She applied for a patent in 1846, and soon afterward, manufacturer A. Perin & Company of Paris, France, purchased the rights to her innovation. Combining Crepin’s welding method with new steel alloys and advanced tempering techniques, Perin created the first modern band saw blade. The first American band saw patent was granted to Benjamin Barker of Ellsworth, Maine, in January of 1836. According to the sources the first factory produced and commercially available band saw was the Paul Prybil's band saw patent for cutting wood. Power hacksaws (with reciprocating blades) were once common in the metalworking industries, but bandsaws and cold saws have mostly displaced them.hacksawscold saws History Of The Band Saw

5. Band Saws come in many different sizes and styles. They are used to cut metals, woods, plastics, and foods Meat Cutters Electricians Woodworkers Pipe Fitters Stationary

6. Saws for cutting meat are typically of all stainless steel construction with easy to clean features. The blades either have fine teeth with heat treated tips, or have plain or scalloped knife edges.meatstainless steelheat treated Bandsaws for cutting metal are available in vertical and horizontal designs. Typical band speeds range from 40 feet (12 meters) per minute to 5,000 feet (1,500 meters) per minute, however specialized bandsaws are built for friction cutting of hard metals and run band speeds to 15,000 feet per minute. Metal-cutting bandsaws are usually equipped with brushes or brushwheels to prevent chips from becoming stuck in between the blade's teeth. Systems which cool the blade are also common equipment on metal- cutting bandsaws. The coolant washes away chips and keeps the blade cool and lubricated. Timber millsTimber mills use very large bandsaws for ripping lumber; they are preferred over circular saws for ripping because they can accommodate large-diameter timber and because of their smaller kerf (cut size), resulting in less waste.rippinglumbercircular sawskerf

7. Seat and heal cut to allow the rafter to sit flat on the double top plate We use the Band Saw to make these cuts on model scale house rafters.

8. The Band Saw blade runs on the center of two wheels.

10. Construction Technology Band Saw Directions: Identify the numbered parts on the saw illustrated below. 4. 5. 6. 7. 8.9. 16. 15. 12. 13. 11. 10. 3. 2. 1. 14. 5.6.7.8. 9.10.11.12. 13.14.15.16.

11. Safe Operating Procedures 1.Operate only with the instructor’s permission and after you have received instruction. Must pass safety test with 70% or better. 2.Remove jewelry, secure loose clothing and tie long hair back in a pony tail. 3.Always use personal protective equipment (PPE) & proper eye protection (Safety Glasses). 4.Do a visual inspection of the material you are about to cut. Look for defects such as warps, knots and nails or staples. 5.Keep all safety guards in place. Never remove any guards no matter what.

12. Part 2: Safe Operational Procedures (Continued) 6.Adjust the upper guard and guide about 1/8” to 1/4” above material to be cut. 7.Select proper blade width. No cutting radius should be too small for the blade. General rules regarding minimum radius cuts by blade width. Blade WidthMinimum Radius 3/4”1 ¾” 1/2”1 ¼” 3/8”1” 1/4”¾” 3/16”½” 1/8”¼”

13. 8.Keep blades sharp and properly set. If blade leads to one side, it may be dull, unevenly set, or a guide may be improperly set. Blade guides should be snug but not tight against the blade (paper thickness on each side). 9. Keep floor and surrounding area free of scrap that might cause tripping. 10. Be sure saw is properly grounded. 11. Keep all guards in place at all times. 12. Get someone to assist in operations which are not safely handled alone. 13. Make all adjustments with the power off and blade stopped. 14. Keep hands a safe distance from moving parts, never closer than 2 inches from the blade. Part 2: Safe Operational Procedures (Continued)

14. 15. Give undivided attention to the job. The operator should be the only one inside the safety zone area. 16. Use a push block when sawing small stock. 17. Never reach around a moving blade. 18. When making a cut, do not place hands in line with the cutting edge. 19. Never attempt to remove small pieces of wood from near the blade while the saw is running. 20. Never leave a running saw unattended. 21. When finished cutting, shut off the switch and disconnect machine from power source. Do not leave the safety zone until the blade comes to a complete stop. 22. Do not distract someone that is using Part 2: Safe Operational Procedures (Continued)

15. End of power Point! Now you are ready to take the safety test. Watch a demonstration of the tools use, by the instructor. Can you demonstrate your ability to use the tool safely?