[TheForge] Power hammer questions Shannell

Sat Mar 22 04:50:01 2003

Interesting thought, I dont think an LSD equiped diff would work too well on
a JYH, you couldnt get the hammer to idle because both axles are driven
generally. The majority of diffs are non LSD so its easy to find one, just
turn one wheel by hand and if the other wheel turns in the same direction
its LSD, a badly worn LSD will not turn though. The handbrake cable is
hooked to a foot pedal and as you progressively brake the hammer side goes
faster and faster, works well and will last a long time before the shoes
wear out. The hammer idles or stops quite well, the inertia of the hammer
head and the friction in the guides is enough to let that axle idle while
the opposite side runs at full driven speed. A diff is great for this
application, the reuction ratio helps in your gearing, the clutch is there
already and the whole thing is designed to last many many millions of cycles
not to mention how cheap they are.
----- Original Message -----
From: "ilerner2" <[email protected]>
To: <[email protected]>
Sent: 22 March, 2003 2:22 PM
Subject: Re: [TheForge] Power hammer questions Shannell


> Shannell, I was looking at those JYH's just a few days ago thinking hmmm
> quick and dirty but I did not understand something. Those rear ends, are
> they of the positrac or limited slip variety? Secondly how is the drive
> engaged and disengaged via the use of a brake on one end? As I understand
> these limited slip set ups, when they are being driven both wheels are
> turning and by applying brake to one end the drive power is transferred to
> the non braking end. How then is the hammer stopped? Releasing the brake
> then simply would allow both ends to turn together again. What am I
missing
> here? Also, how is the speed controlled?
>
> Ian....
>
>
> ----- Original Message -----
> From: "Shannell Sugrue" <[email protected]>
> To: <[email protected]>
> Sent: Friday, March 21, 2003 7:00 PM
> Subject: Re: [TheForge] Power hammer questions
>
>
> > Go the Krause method for a low noise air hammer, or put the compressor
> > outside the shed and plumb the exhaust outside also. You can get a
variac
> (I
> > think thats what they are called) to vary the speed of an AC motor thus
> > varying how hard you hit but also lower BPM, but why not use a clutch,
its
> > probably the easiest method and a car differential via the handbrake is
a
> > great way to do this, I built a JYH using this method, pics on
anvilfire,
> > the clutch worked pretty well.
>
>
>
> ---
> Outgoing mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.463 / Virus Database: 262 - Release Date: 3/17/2003
>
> _______________________________________________
> http://mailman.qth.net/mailman/listinfo/theforge
> theforge mail list group photo site is
> http://www.photoaccess.com
> Login:  [email protected]
> password:  anvil
> ___________
>
>
>