View Single Post
  #6   Report Post  
Posted to rec.crafts.metalworking
Gunner Asch[_6_] Gunner Asch[_6_] is offline
external usenet poster
 
Posts: 10,399
Default "Earless" Pillow Blocks and synchronous belts

On Thu, 11 Jun 2015 12:40:59 -0500, Tim Wescott
wrote:

On Thu, 11 Jun 2015 08:53:19 +0700, John B. wrote:

On Wed, 10 Jun 2015 09:58:59 -0400, Tom Gardner
wrote:

I'm sure we all know what I'm referring to when I say "earless" pillow
block but is there a correct nomenclature to ask for? I need earless
pillow blocks with Timken type tapered roller bearings, or something
else that will handle moderate thrust, with a 1" bore and be permanently
lubed.


I've seen them described as "Tapped Base" See:
http://www.astbearings.com/tapped-ba...ow-blocks.html


Are timing belts and synchronous belts the same thing? I need to
transmit 5 to 7.5 Hp to a parallel 1" shaft at 2K RPM, 1:1 with a motor
about 10" away. I'm just not smart or patient enough to figure out the
correct belt using the graphs and formulas on the suppliers' web pages
while some people intuitively know what belt to use. For various
reasons, I can't use V-belts.


I believe that the generic term is "synchronous belt" and "timing belt"
is a term that might be applied to automobile use, see:
https://www1.eere.energy.gov/manufac...sistance/pdfs/

replace_vbelts_motor_systemts5.pdf
or https://ww2.gates.com/europe/index.cfm?location_id=3573


I've seen "timing belt" used by purveyors of mechanical stuff. The
impression I get is that if it's there just to keep things synchronized
then it's a "timing belt", but if it's there to transmit serious power
then it's a "toothed belt" or "synchronous belt".

Of course, "serious power" in a copier may be ten times lighter weight
than a "timing belt" in a heavy diesel engine, but hey -- whatever
terminology floats your boat.


I use both herringbone belts and "ladder belts" on 5hp CNC lathes that
need to transmit both power AND keep the spindle in perfect time with
the motor (servo)

http://www.veyance.com/ProductsDetail.aspx?id=3400

Goodyear makes both. Gates does as well

http://info.gates.com/beltpm?gclid=C...yGQaAgBF8P8HAQ

Download the Gates manual here.

Gunner