DIYAPASON-L Digest #414 - Sunday, October 21, 2001
 
Spencer blower, Century motor, now 21st century
  by "Jon Fick" <jon@VermontFicks.org>
Re: [Residence Organs]  Spencer blower, Century motor, now 21st century
  by <Mpmollerorgan@aol.com>
Re: [Residence Organs]  Spencer blower, Century motor, now 21st century
  by <Mpmollerorgan@aol.com>
Re: Spencer blower, Century motor
  by "Larry Chace" <RLC1@etnainstruments.com>
Re: [Residence Organs]  Re: Spencer blower, Century motor
  by <Mpmollerorgan@aol.com>
 

(back) Subject: Spencer blower, Century motor, now 21st century From: "Jon Fick" <jon@VermontFicks.org> Date: Sun, 21 Oct 2001 20:03:35 -0400   I've posted a few notes recently regarding the Spencer blower at our = church. It had a 1/2HP Century repulsion start motor. Until now. I replaced the ailing motor with a motor assembly whose bolt pattern and shaft length & position are the same as the old Century. Refer to http:www.VermontFicks.org/blowmod.htm for photos if you are interested.   The reason it's an assembly is because you can't easily obtain (or obtain = at all) a motor with a 3/4" diameter shaft, 16" long! The new motor is 3/4HP in hopes that it will loafe along and not run too hot. I may force wind through the motor from a small takeoff if thermal rise becomes an issue. The motor itself is a bit noiser than the old Century. For us that's not = an issue. All parts came from Grainger. $150 if memory serves.   Jon Fick Westford, Vermont    
(back) Subject: Re: [Residence Organs] Spencer blower, Century motor, now 21st century From: <Mpmollerorgan@aol.com> Date: Sun, 21 Oct 2001 20:48:43 EDT     In a message dated 10/21/01 7:03:10 PM, jon@VermontFicks.org writes:   >u are interested. > >The reason it's an assembly is because you can't easily obtain (or obtain >at >all) a motor with a 3/4" diameter shaft, 16" long! The new motor is = 3/4HP >in hopes that it will loafe along and not run too hot. I may force wind     I still can't see why one can't simply use one of those heavy duty steel shaft couplers with the set screws to attach any length shaft necessary to =   any motor, the 1999-2000 Grainger catalog lists some on page 356 as "Rigid =   steel couplings" in both set screw and 2 styles of clamp type. Bore sizes from 1/4" to 1-1/2", with or without keyway; "For applications =   where alignment is critical" It even lists a 3/4" size and 3/4" steel rod seems to me pretty standard...     Randall http://members.aol.com/mpmollerorgan/  
(back) Subject: Re: [Residence Organs] Spencer blower, Century motor, now 21st century From: <Mpmollerorgan@aol.com> Date: Sun, 21 Oct 2001 21:08:53 EDT     In a message dated 10/21/01 7:03:10 PM, jon@VermontFicks.org writes:   >ailing motor with a motor assembly whose bolt pattern and shaft length >& >position are the same as the old Century. Refer to >http:www.VermontFicks.org/blowmod.htm for photos if you are interested.   The Url is actually;   http://www.VermontFicks.org/blowmod.htm   Nice photos! The only thing I can think of was a note from someone regarding my earlier =   idea of using such a belt driven deal before I found my current blower. It =   must have been Al Sefl (sp?).. who wrote once last summer warning me the belt drive idea would NOT make me happy. I don't rememebr what all he said about it but it was enough for me to completely nix the belt idea and look for a complete blower so it must = have been something strong in his email.   Al I consider a blower expert and I think he is on this list or "trackers = n pipes." Hope your final drive is the same RPM as the original Century motor, my 2 = HP Century is 1100 or 1120 RPM, something like that, pretty much can't find = that RPM in new motors.   Randall http://members.aol.com/mpmollerorgan/  
(back) Subject: Re: Spencer blower, Century motor From: "Larry Chace" <RLC1@etnainstruments.com> Date: Sun, 21 Oct 2001 22:38:56 -0400   Randall asked about using a shaft coupler to extend the motor shaft when replacing an old long-shaft motor on an Orgoblo. I'm no motor expert, but I'd be afraid that no type of coupler would be able to keep the shaft extention running true, given that the Orgoblo does not have a shaft bearing at the input end but rather depends entirely upon the motor's two bearings. Once the coupled shaft begins to be non-axial, then the whole thing will degrade suddenly (and perhaps catastrophically).   The Spencer *Turbine* blowers do have such a bearing, and in fact they use a short-shaft motor with a coupler to the actual blower shaft. I believe that the Turbines are usually the larger blowers, although I've seen a 5hp example.   Larry Chace        
(back) Subject: Re: [Residence Organs] Re: Spencer blower, Century motor From: <Mpmollerorgan@aol.com> Date: Sun, 21 Oct 2001 23:04:13 EDT     In a message dated 10/21/01 9:38:44 PM, RLC1@etnainstruments.com writes:   >Randall asked about using a shaft coupler to extend the motor shaft when >replacing an old long-shaft motor on an Orgoblo. I'm no motor expert, >but >I'd be afraid that no type of coupler would be able to keep the shaft >extention running true, given that the Orgoblo does not have a shaft >bearing at the input end but rather depends entirely upon the motor's two >bearings. Once the coupled shaft begins to be non-axial, then the whole >thing will degrade suddenly (and perhaps catastrophically).   Yes, aware of that, though one could add a pillow block bearing on the extended shaft section, maybe on the inner of the two iron motor mounts = the Century is mounted to with four bolts. Modern motors are smaller and less deep, so I assume besides making a different plate for the motor to bolt = to, that one can add a bearing. Grainger has some of those heavy steel bearings that bolt down and have a grease fitting , I had several I was going to use but wound up with the different blower and since they were nothing I could ever use I tossed em. = I think they were for 1" shaft and weighed about 5# each.   Randall http://members.aol.com/mpmollerorgan/