Even if there were the motor would stall, since he’d have no torque and the motor would overheat since it’s fan would be going 1/15th it’s designed cooling RPM. 02-07-2008, 05:36 PM #4. 02-07-2008, 05:49 PM #5 I saw :p a delta wood working bandsaw with a ring gear from an automobile attached to a band wheel. I’ve seen a big bandsaw that was meant for wood setup for cutting metal, and it worked OK. The guy had a DC motor on it with a big variac/rectifier speed control. The motor pulley will not bore out to fit the shaft of the new motor, so I am in the process of turning high & low range motor pulleys which I should be doing now instead of typing this.
I’m looking for an EASY modification to slow it down from 3,000 fpm blade speed to make it useable for cutting small pieces of bar stock and sheet metal. The real problem is that blade tension for wood cutting and metal cutting are significantly different and there is no way in the world you will be operating a better than 20-25% of the needed tension. Metal cutting with a wood speed tool makes a fantastic racketand on a bandsaw the blade will go redhot and burn up or loose all its teeth in seconds to minutes at wood speed whether HSS or not.
Most 1 phase motors only have a start capacitor, they are switched out of the circuit once motor is up to speed. If the Start cap is NOT switched out of the circuit by the centrifugal switch, the motor doesn’t have it’s full torque capacity. 08-18-2015, 11:43 AM #13 The purpose of the capacitor and centrifugal switch are to create a phase shift in the start windings to get the motor started so it can then run.
If I added another motor that ran half as fast as the original and then reduced that down by about 3 to 1 belt drive to the original motor the speed would be about right for aluminum. When the fast motor is running the slow motor doesn’t turn because of the sprag bearing. In retrospect it would have been much easier to just install a treadmill motor but I didn’t have a treadmill motor and I did have two A/C motors.
Mike, thanks for the info, that really helps! Maybe you can answer a technical question for me… The motor on the band saw is a 1725 RPM. The final wheel that the actual blade goes on is 63.5 inches around, so one revolution of the wheel makes the blade travel 63.5 inches. You know, math was never my long suit, if it were, I’d be a lot better off in life than I am…. I suppose that it would be possible to get the blade speed slow enough without the use of a variable speed motor, you’d simply have to have a couple more step-down pulley segments… how many is beyond me, that’s why I opted for the variable speed motor. Besides you get a little more flexibility with a variable speed motor, as you can slow it down for thick hard stock or speed it up for thinner softer materials.
The blade teeth should be facing downward-reinstall the blade properly if the blade teeth face upward. If you have the blade installed correctly but you have to push hard on the work piece when cutting and blade twists during cutting, then the blade is likely dull. Use a 6 TPI saw blade when cutting pine wood and other soft material instead of a 14 TPI blade because a blade with fewer teeth will cut through soft material faster than a blade with more teeth.
how to slow down band saw Related Question:
What speed should a wood bandsaw run at?
Bandsaw: Speeds. A common speed for the bandsaw is about one thousand feet per minute. Wood can effectively be cut at much higher speeds, up to and over five thousand feet per minute, but you should keep it slower because it’s safer.
Why does my bandsaw slow down?
Using a dull blade or the incorrect type of blade can cause the band saw to cut through work pieces slowly. The blade will also move slowly through the work piece if the blade is installed incorrectly. A weak drive motor can also cause the band saw to cut slowly. First, check the installation of the band saw blade.
What should you not do with a band saw?
Never push on back of piece with fingers or thumb. Don’t reach across the blade. Make all cuts under power, not while blade is coasting. Never remove guard unless authorized by Technician or WRL Manager.
What RPM should a bandsaw run at?
Bandsaws always use 1725 rpm. The 3450 rpm are way too fast. From contributor R: Depending on the size of the wheels bandsaw blade speeds can vary between 2000 SFPM to over 4500 SFPM.
How high can a bandsaw cut?
The resaw capacity is the maximum height (thickness) that can be cut. For the small shop furniture maker, go with 14″ as the minimum for a bandsaw, though 16″ is better. Those doing larger work might even want 18″ or 20″ machines. Just make sure you have a minimum resaw height of 12″ for versatility.
Can you use a metal bandsaw blade to cut wood?
What are the ideal conditions for cutting wood on a metal saw? While cutting wood on a metal bandsaw is perfectly fine, you should switch over to a 6TPI blade if you have the time or anticipate cutting a lot of wood.
Why do bandsaws have 2 speeds?
The primary reason for speed adjustment on bandsaws is to accommodate different materials (mainly metal). That said, dropping the speed down for some operations can stretch the capabilities of an underpowered machine further.
What causes bandsaw drift?
Drift is cause because the blade buckles under the load. You can see that by stretching a ribbon between 2 points and applying a pressure to one of the edges, it will turn sideway easily. A sharp blade and high blade speed will help a lot with that.
Can you rip wood on a bandsaw?
A band saw can shape curves, saw rough lumber safely, cut joinery, and even rip boards to width.
What must you never do when using the bandsaw to ensure you don’t pull off the blade?
Make curved cuts gradually and use relief cuts for tight radius curves. Never back out of curved cuts while machine is still running as this will result in the blade coming off. (You must wait until blade comes to a complete stop).
Why do bandsaw blades break?
Machine Defects Even the best blades can fail if there is something else wrong with your bandsaw, and even a small misalignment of bearings or guides can put a twist in the blade as it goes around. Resulting in tension being applied in all the wrong ways which will lead to early breakage.
Why won’t my bandsaw cut straight?
Band Saw: Why won’t my band saw cut straight? When the band saw cuts crooked, a dull blade, improper feeding, loose blade tension or not using a work piece guide could be the cause. Use the rip fence or miter gauge to guide the work piece uniformly through the cutting blade to make straight cuts.
What RPM should a metal bandsaw run?
You want the blade running at about 75 RPM for steel, 150 max. Any faster and you will work harden as you cut (due to heat build up) and fry your blade.
How is bandsaw speed calculated?
The formula to determine S.F.P.M. is: Motor RPM multiplied by the Motor pulley diameter divided by the Driven pulley diameter times the Bandsaw wheel diameter times pi (3.1416) divided by 12 = S.F.P.M.
How thick of wood can a bandsaw cut?
Band saws are the undisputed champ when it comes to cutting curves and slicing through thick material. Many small band saws can slice though lumber a full four inches thick, and bigger saws handle six-inch cuts.