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Viscous Dissipation



 
 
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  #1  
Old July 21st 18, 07:31 PM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

Chinese Pulley:

$2/US Stainless steel. Fixed centre shaft. Single pulley wheel rides
directly on shaft, e.g. no intermediary ball bearings. M2 (? Chinese)
rating: Guesstimate a working load around 100lb. max for practical
eyeballing (at the pulley) - probably advertised for twice or more
that, more purely for body construction or what it'll hold. Maybe
300-400lbs. Actually kinda nice for a solid 3"-ish construction.

Made an overhead cable attachment for my iron channel lifting cage.
Some spare, different chain lengths, some threaded through cut rubber
hose. Secured links with nuts and bolts. Main cable is 3/8"
strand-and-twisted nylon rope, clothes-line or near to. Total cost to
me so far: the $2US Chinese pulley.

70, 80lb. abdominal crunches and triceps extensions, forcing much
more, 100lb. is where it begins lifting, tilting the front of the
80lb.-ish power cage towards, over and onto me.

Pulley squeals, up to like a stuck pig, at dry. WD40 lasted once, a
session, as does penetrating spray mechanical oil. Motor oil does
better, 3 or 4 sessions. Which is as far as I've got.

But that's all, besides and mostly, nasty. Sweat and a towel are
enough. Any more, motor oil, is near to totally unacceptable.
Had a hunch solid grease might surface, though, I've a tin of it,
except I remembered a tube of food-grade, presumably lithium high-temp
solid grease I'd use on a roaster for coffee beans.

So I used a small, 3/8" wide utility razor to stuff the grease between
the pulley housing, as much as I could get in there, from little play
at the sides of the pulley, to lubricate the shaft and pulley edges
for contact at opposite housing sides.

Which is where I'm at. Any further, I just don't know. Silicon
grease or dry lubricant graphite powder might be the breaking point,
where I say screw it, go back and buy another pulley with a different
design (non-fixed or nut-&-bolt secured pulley shaft). Provided of
course doesn't raise the price of Chinese pulleys to commiserate
$50B/US, made by the rich for the rich.

Apparently, what I'm thinking after noticing is that centre-bearing
"kits", ball-bearing-load are the regular, inexpensive item also on
the menu for the Chinese pulley crowd. Sold for packs of 10 bearings.
I guess Chinese also have issues with the Squealing Pig.
  #2  
Old July 21st 18, 07:41 PM posted to alt.comp.hardware.pc-homebuilt
Rene Lamontagne
external usenet poster
 
Posts: 187
Default Viscous Dissipation

On 07/21/2018 1:31 PM, Flasherly wrote:
Chinese Pulley:

$2/US Stainless steel. Fixed centre shaft. Single pulley wheel rides
directly on shaft, e.g. no intermediary ball bearings. M2 (? Chinese)
rating: Guesstimate a working load around 100lb. max for practical
eyeballing (at the pulley) - probably advertised for twice or more
that, more purely for body construction or what it'll hold. Maybe
300-400lbs. Actually kinda nice for a solid 3"-ish construction.

Made an overhead cable attachment for my iron channel lifting cage.
Some spare, different chain lengths, some threaded through cut rubber
hose. Secured links with nuts and bolts. Main cable is 3/8"
strand-and-twisted nylon rope, clothes-line or near to. Total cost to
me so far: the $2US Chinese pulley.

70, 80lb. abdominal crunches and triceps extensions, forcing much
more, 100lb. is where it begins lifting, tilting the front of the
80lb.-ish power cage towards, over and onto me.

Pulley squeals, up to like a stuck pig, at dry. WD40 lasted once, a
session, as does penetrating spray mechanical oil. Motor oil does
better, 3 or 4 sessions. Which is as far as I've got.

But that's all, besides and mostly, nasty. Sweat and a towel are
enough. Any more, motor oil, is near to totally unacceptable.
Had a hunch solid grease might surface, though, I've a tin of it,
except I remembered a tube of food-grade, presumably lithium high-temp
solid grease I'd use on a roaster for coffee beans.

So I used a small, 3/8" wide utility razor to stuff the grease between
the pulley housing, as much as I could get in there, from little play
at the sides of the pulley, to lubricate the shaft and pulley edges
for contact at opposite housing sides.

Which is where I'm at. Any further, I just don't know. Silicon
grease or dry lubricant graphite powder might be the breaking point,
where I say screw it, go back and buy another pulley with a different
design (non-fixed or nut-&-bolt secured pulley shaft). Provided of
course doesn't raise the price of Chinese pulleys to commiserate
$50B/US, made by the rich for the rich.

Apparently, what I'm thinking after noticing is that centre-bearing
"kits", ball-bearing-load are the regular, inexpensive item also on
the menu for the Chinese pulley crowd. Sold for packs of 10 bearings.
I guess Chinese also have issues with the Squealing Pig.


What kind off grass are you on?

  #3  
Old July 21st 18, 07:45 PM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

On Sat, 21 Jul 2018 14:31:42 -0400, Flasherly
wrote:

Chinese Pulley:


Oh, yeah. I'm resisting the urge to buy 1/4", 7-group strained
stainless wire, 3/8" total vinyl covered cable. Like 800lbs. or
whatever else not aircraft intended.

50ft.

I actually bought the pulley, two as a pair, and don't want to get
over my head by mounting another, at my feet, for going the gamut of
exercise movements overhead and down, adding another length of cable
for optional attachment, to start another group of exercises from down
and back to all the way up.

As if vinyl-coated steel cable is going to be the icing to a cupcake
of two squealing pigs then singing in concerto.
  #4  
Old July 21st 18, 07:51 PM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

On Sat, 21 Jul 2018 13:41:58 -0500, Rene Lamontagne
wrote:

What kind off grass are you on?


I avoid public gyms. Dykes or court-mandated memberships for
anger-management issues. Generally as well the "little" clubs where
they do tend offer grass if not direct injections into the muscles.
But I understand and would like to know where you work out? Maybe
I'll drop by and we'll do some 450lb. deadlifts. You really do sound
like a such nice guy to have screaming at me.
  #5  
Old July 21st 18, 09:32 PM posted to alt.comp.hardware.pc-homebuilt
Rene Lamontagne
external usenet poster
 
Posts: 187
Default Viscous Dissipation

On 07/21/2018 1:51 PM, Flasherly wrote:
On Sat, 21 Jul 2018 13:41:58 -0500, Rene Lamontagne
wrote:

What kind off grass are you on?


I avoid public gyms. Dykes or court-mandated memberships for
anger-management issues. Generally as well the "little" clubs where
they do tend offer grass if not direct injections into the muscles.
But I understand and would like to know where you work out? Maybe
I'll drop by and we'll do some 450lb. deadlifts. You really do sound
like a such nice guy to have screaming at me.


No, No, not screaming at you, 375 lbs was my limit, many, many years
ago, Now retired, I'm 84 no need to work out.

Rene



  #6  
Old July 21st 18, 11:54 PM posted to alt.comp.hardware.pc-homebuilt
Charlie Hoffpauir
external usenet poster
 
Posts: 347
Default Viscous Dissipation

On Sat, 21 Jul 2018 14:31:42 -0400, Flasherly
wrote:

Chinese Pulley:

$2/US Stainless steel. Fixed centre shaft. Single pulley wheel rides
directly on shaft, e.g. no intermediary ball bearings. M2 (? Chinese)
rating: Guesstimate a working load around 100lb. max for practical
eyeballing (at the pulley) - probably advertised for twice or more
that, more purely for body construction or what it'll hold. Maybe
300-400lbs. Actually kinda nice for a solid 3"-ish construction.

Made an overhead cable attachment for my iron channel lifting cage.
Some spare, different chain lengths, some threaded through cut rubber
hose. Secured links with nuts and bolts. Main cable is 3/8"
strand-and-twisted nylon rope, clothes-line or near to. Total cost to
me so far: the $2US Chinese pulley.

70, 80lb. abdominal crunches and triceps extensions, forcing much
more, 100lb. is where it begins lifting, tilting the front of the
80lb.-ish power cage towards, over and onto me.

Pulley squeals, up to like a stuck pig, at dry. WD40 lasted once, a
session, as does penetrating spray mechanical oil. Motor oil does
better, 3 or 4 sessions. Which is as far as I've got.

But that's all, besides and mostly, nasty. Sweat and a towel are
enough. Any more, motor oil, is near to totally unacceptable.
Had a hunch solid grease might surface, though, I've a tin of it,
except I remembered a tube of food-grade, presumably lithium high-temp
solid grease I'd use on a roaster for coffee beans.

So I used a small, 3/8" wide utility razor to stuff the grease between
the pulley housing, as much as I could get in there, from little play
at the sides of the pulley, to lubricate the shaft and pulley edges
for contact at opposite housing sides.

Which is where I'm at. Any further, I just don't know. Silicon
grease or dry lubricant graphite powder might be the breaking point,
where I say screw it, go back and buy another pulley with a different
design (non-fixed or nut-&-bolt secured pulley shaft). Provided of
course doesn't raise the price of Chinese pulleys to commiserate
$50B/US, made by the rich for the rich.

Apparently, what I'm thinking after noticing is that centre-bearing
"kits", ball-bearing-load are the regular, inexpensive item also on
the menu for the Chinese pulley crowd. Sold for packs of 10 bearings.
I guess Chinese also have issues with the Squealing Pig.


Garage door openers (Chamberlain, possibly many others) employ a
combination of cable and chain drives, with several cable pulleys.
These seem to work (forever)on garage doors, but spare parts might be
available at the big box stores like Home Depot.
  #7  
Old July 22nd 18, 03:23 AM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

On Sat, 21 Jul 2018 15:32:16 -0500, Rene Lamontagne
wrote:

No, No, not screaming at you, 375 lbs was my limit, many, many years
ago, Now retired, I'm 84 no need to work out.


Bull****, Rene. 84 is no excuse. But, really, at least I can hope to
still be lifting at 84. I've only known one pretty near to that age:
An Austrian or German, Bona-Fide Carney Strongman Showman. Hell'va
nice guy, about 6'2" and wide as a house. He'd been a lifter all his
life.

Also met a state champion deadlifter, late one night in a key-club, I
watched rep'ing 5x450lbs for his warm-up.

That 450lb'r, I'd put the Olympic bar clips on the cage facing
outwards, slightly below where my wrists naturally fall, feet shoulder
width. Standing inside, leather wrist straps, I first lean into the
bar, lifting the 450lbs by standing straight. Just enough to clear
clips and no feet movement. -Then- the deadlift, lowering 450lb down
to "legal" position and back up and bar back onto the clips. Belt,
knee wraps over neoprene knee sleeves and wraps on the shins as well.
Sort of a deadlift and half. Nothing legal, though. 375lb I can
pull maybe times consecutively -- only on a really good day.

375lbs that's far better than a good start though. 285lbs. is where I
put natural talent for just coming out of the gate fresh. More
important than the weight, though, is taking care of the hip and knee
joints and ligaments, back, and everything else about proper form.

Gimme a high-five, Rene.
  #8  
Old July 22nd 18, 03:48 AM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

On Sat, 21 Jul 2018 17:54:52 -0500, Charlie Hoffpauir
wrote:

Garage door openers (Chamberlain, possibly many others) employ a
combination of cable and chain drives, with several cable pulleys.
These seem to work (forever)on garage doors, but spare parts might be
available at the big box stores like Home Depot.


Garage door spring is what I used for the securement block, (a spare
dumbbell handle Wallymart tried to rip me off on Ebay by sending a
single unit), which is where I slip on the olympic plates. Garage
door spring, high poundage/ tensile strength, and the centre happened
to be wide enough to thread onto a standard 1" dumbbell hand. Had to
use a 100lb vise and leather gloves to twist the dumbbell handle,
threading that spring deeply enough on the handle. Both dumbbell
securement collars I left on the other side, one jammed and locked
over piece of nylon ribbon wrapped around the threads. 2"-holed
Olympic plates then slide on, (from the spring side), nicely to
butt-up securely to the collars. I pulled, wedged up the length of
spring, enough to form a partial circle where I can slip a chain
length under and into. (Some heavy chain on both ends of the nylon
rope). None of that is going anywhere, anyway, with two 35lb. Dick
Sporting Goods Chinese Olympic plates slipped on.

Ignore the dangers for a brief instant to close your eyes. Can you
begin to hear that $2/US Chinese pulley beginning now, heating up, and
rising in volume to a full-blown pig squeal?

(Well, will first have to see if the lithium food grease "axle pack"
holds and has permeance. I've seen one gym rat before break down and
rejuvenate Olympic bars with lithium, in preference to petroleum
derivatives. Even though swiveling snatch and curl collars are
definitely not per se a cable pulley.)
  #9  
Old July 22nd 18, 03:49 AM posted to alt.comp.hardware.pc-homebuilt
Rene Lamontagne
external usenet poster
 
Posts: 187
Default Viscous Dissipation

On 07/21/2018 9:23 PM, Flasherly wrote:
On Sat, 21 Jul 2018 15:32:16 -0500, Rene Lamontagne
wrote:

No, No, not screaming at you, 375 lbs was my limit, many, many years
ago, Now retired, I'm 84 no need to work out.


Bull****, Rene. 84 is no excuse. But, really, at least I can hope to
still be lifting at 84. I've only known one pretty near to that age:
An Austrian or German, Bona-Fide Carney Strongman Showman. Hell'va
nice guy, about 6'2" and wide as a house. He'd been a lifter all his
life.

Also met a state champion deadlifter, late one night in a key-club, I
watched rep'ing 5x450lbs for his warm-up.

That 450lb'r, I'd put the Olympic bar clips on the cage facing
outwards, slightly below where my wrists naturally fall, feet shoulder
width. Standing inside, leather wrist straps, I first lean into the
bar, lifting the 450lbs by standing straight. Just enough to clear
clips and no feet movement. -Then- the deadlift, lowering 450lb down
to "legal" position and back up and bar back onto the clips. Belt,
knee wraps over neoprene knee sleeves and wraps on the shins as well.
Sort of a deadlift and half. Nothing legal, though. 375lb I can
pull maybe times consecutively -- only on a really good day.

375lbs that's far better than a good start though. 285lbs. is where I
put natural talent for just coming out of the gate fresh. More
important than the weight, though, is taking care of the hip and knee
joints and ligaments, back, and everything else about proper form.

Gimme a high-five, Rene.


Yep, High-Five, Happy dreams.

Rene

  #10  
Old July 22nd 18, 12:54 PM posted to alt.comp.hardware.pc-homebuilt
Flasherly[_2_]
external usenet poster
 
Posts: 2,407
Default Viscous Dissipation

On Sat, 21 Jul 2018 21:49:15 -0500, Rene Lamontagne
wrote:


Yep, High-Five, Happy dreams.


You're right again. I figured out the solution: There is none.
Nobody wants to sell nickel-&-dime pulley blocks. It's a dream. If
the "food grade grease" doesn't hold up, I'll just have to keep on
repacking the pulley for as long as it does.

Real pulleys, OTH, can be (easily) maintained, provided they even
squeal in the 1st place. I found these...

Factory 2nd's on Ebay for a steal. One is normally $40+, on this link
being sold for $7.50 each.

Except they won't sell less, direct from the factory, than for 20
units at $150 in a boxed lot.

Way overrated, but that price is a crying shame. Damn good blocks...

https://www.ebay.com/itm/Wholesale-L...-FACTORY-2NDS/
122015629489?hash=item1c68b2c0b1%3Ag%3AeYMAAOSwq7J T0UG1&_sop=15&_nkw=pulley+ton&_sacat=184212&_from= R40&LH_BIN=1&rt=nc&LH_TitleDesc=0%7C0
 




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