reddevil76 Report post Posted July 1, 2012 Does anyone know if there is an accessory equivalent to the Sailrite's Monster for the Pfaff MA 1245? I've googled till I'm crossed eye and still came up with nothing. I wish to use the really slow speeds on my servo motor, but too low, and there just isn't enough torque. Quote Share this post Link to post Share on other sites
stelmackr Report post Posted July 5, 2012 ...I wish to use the really slow speeds on my servo motor, but too low, and there just isn't enough torque. I use a larger hand wheel (increases inertia) on my 1245 that with the servo motor and pulley reduction gives plenty of torque. Quote Share this post Link to post Share on other sites
stelmackr Report post Posted July 6, 2012 I use a larger hand wheel (increases inertia) on my 1245 that with the servo motor and pulley reduction gives plenty of torque. I see that I did not answer your question. I asked FERDCO (now out of business) to put a larger hand wheel on my FERDCO 1245 and they used (I believe) a Juki 441 hand wheel, but had a bushing placed in it to match the shaft diameter. I do not know where the hand wheel was obtained from. Since FERDCO is out of business they are still selling out some odds and ends so check their website ferdco.com and send them an email for details. They also modified my FERDCO PRO 206 (Consew 206 clone) the same way. Here are two pictures for the 1245 and one of the 206: FERDCO PRO 1245 (Pfaff 1245 clone) FERDCO PRO 1245 (Pfaff 1245 clone) FERDCO PRO 206 (Consew 206 clone) Hope this helps. Quote Share this post Link to post Share on other sites
reddevil76 Report post Posted July 6, 2012 Thank you! Actually by removing the original wheel, I can find someone to machine another one for me that is larger. It is just that I am not sure, if the "larger" portion, has to be where the belt attaches (and so needs a longer belt) or just the outer diameter. And if a longer belt is needed, how do I determine how long. Because on motorcycles, we do use a larger rear sprocket for increased torque, and that is effective only if the drive chain rides on this larger diameter. If the sprocket is huge, but the drive chain still rides on a smaller inner diameter, there is no increase in torque. Quote Share this post Link to post Share on other sites
Northmount Report post Posted July 6, 2012 1341535490[/url]' post='255369']Thank you! Actually by removing the original wheel, I can find someone to machine another one for me that is larger. It is just that I am not sure, if the "larger" portion, has to be where the belt attaches (and so needs a longer belt) or just the outer diameter. And if a longer belt is needed, how do I determine how long. Because on motorcycles, we do use a larger rear sprocket for increased torque, and that is effective only if the drive chain rides on this larger diameter. If the sprocket is huge, but the drive chain still rides on a smaller inner diameter, there is no increase in torque. If you are looking for more torque, especially at low starting speed, then you need a larger pulley. Belts are sold by width and length. The length (circumference) is usually measured at the top of the pulley, where the top of the belt rides. CTG Quote Share this post Link to post Share on other sites
reddevil76 Report post Posted July 22, 2012 No reply from Ferdco. Guess they can't help me. No luck finding someone to machine a pulley for me either. If anyone knows where I can purchase something like this, please do let me know. Quote Share this post Link to post Share on other sites
Northmount Report post Posted July 22, 2012 (edited) No reply from Ferdco. Guess they can't help me. No luck finding someone to machine a pulley for me either. If anyone knows where I can purchase something like this, please do let me know. Most of the Leather Sewming Machine Vendors in US and Canada have a speed reducer pulley of some sort. Check the vendors at the top of the page. Here is a link to a smaller operation near my location pulley John Leighton sells them for 150 $CAN plus shipping. Others here are priced similarly. Farm and Factory equipment/hardware suppliers near you should have pulleys, bearings and shaft material available if you want to make your own. Takes time, patience, and a lot of fiddling around to rig up your own. Auto supply stores have vee belts. If you are in a busy shop, then it pays to buy it already built instead of spending time doing it yourself, especially if you don't have skills or equipment to build your own. There are a few other recent posts about building your own speed reducer. CTG Edited July 22, 2012 by northmount Quote Share this post Link to post Share on other sites
reddevil76 Report post Posted July 23, 2012 thank you. Quote Share this post Link to post Share on other sites
