michiganhammer Posted October 9, 2013 Share Posted October 9, 2013 I need to get my 150# Bradley Strap Hammer running before the snow falls here in Michigan. I only have single phase capability where I live out in the country. Any Bradley owners that could point me to the right HP and rpm and the best way to set it up would make my day. I always turn to IFI for good advice and the fellowship of like minded individuals. Thanks in advance. Dave Randolph Quote Link to comment Share on other sites More sharing options...
doc Posted October 9, 2013 Share Posted October 9, 2013 If you don't have three phase power or the three motor for the hammer. You could look for a 5HP compressor motor in single phase. If you do have a three phase motor with the hammer a phase converter or rotophase off ebay like Stuart has suggested will probably be your best bet. Quote Link to comment Share on other sites More sharing options...
Ford8nman Posted October 9, 2013 Share Posted October 9, 2013 Get a 1750 rpm, 5 h.p. single phase motor. Compressor motors are usually 3450 rpm Quote Link to comment Share on other sites More sharing options...
Will. K. Posted October 9, 2013 Share Posted October 9, 2013 You might find some info on the New England Blacksmiths websites "Power Hammer Info" Page Quote Link to comment Share on other sites More sharing options...
peacock Posted October 10, 2013 Share Posted October 10, 2013 I have 3 Bradley's, and you will need a 7 1/2 hp to run that hammer like it should be run. I have a 125 just like your 150. It takes all of a 6 hp 950 rpm. You can but a 7 1/2 horse low rpm motor but they are expensive. If you go that route you will need some heavy wiring as well. I built a 15 hp phase converter 20 years ago and run several machine off of it. Quote Link to comment Share on other sites More sharing options...
Fe-Wood Posted October 10, 2013 Share Posted October 10, 2013 I second peacock's advice. I have 200# compact. The motor runs on 950 RPM, 10 HP 3 phase. More importantly, your hammer should run at 350BPM. It can be scary fast having that iron going that fast... But boy, does it move the material! Quote Link to comment Share on other sites More sharing options...
michiganhammer Posted October 10, 2013 Author Share Posted October 10, 2013 Good Morning, Thank you to all who have replied to my post. The original motor that was included with the purchase is a 7 1/2 hp. 3 phase. It is in rough shape, but, I'll have it tested and if ok will try the converter before looking for a single phase. Your replies are much appreciated. DR Quote Link to comment Share on other sites More sharing options...
mike-hr Posted October 10, 2013 Share Posted October 10, 2013 Fe-Wood,, 350 BPM? You gotta lay off the energy drinks, man. A guy could get a stroke trying to think that fast. 200-220 is fine, and the day still passes in the same hours.mike Quote Link to comment Share on other sites More sharing options...
Judson Yaggy Posted October 11, 2013 Share Posted October 11, 2013 The old mechanicals ran wicked fast, there is a ton of original factory literature calling out fairly rapid blows per minute. That being said most literature for 150# hammers suggests around 250 BPM. The 25 pounders were usually made to run at 350-400 bpm. Note that static phase converters only deliver 2/3 of the driven motor's horse power. Rotary converters deliver full HP but you need to do a little research into starting versus running loads. I've seen a lot of guys with underperforming mechanical hammers, if they are mechanically sound then the usual culprit is low speed and lack of a brake. Quote Link to comment Share on other sites More sharing options...
peacock Posted October 11, 2013 Share Posted October 11, 2013 These hammers were made for production shop. Often set up to make 1 part. The bean counters in the front office wanted as many parts in a day as they could get. A lot of Bradleys were set up with closed dies that could hold very close tolerance's. Bradley played to the market, fast hammers made lots of parts quick. I run my 125# at 325 bpm full tilt. It will keep a billet hot a long time if I can manage the speed. Quote Link to comment Share on other sites More sharing options...
Fe-Wood Posted October 11, 2013 Share Posted October 11, 2013 Yah, mine is something to work when running full tilt. It can get away from you real fast. I'd like to slow it down a bit if I could but a 7" wide by 6" diameter pulley is hard to replace.... Works great fro hit-turn tapers. Quote Link to comment Share on other sites More sharing options...
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