Grosshart Post Hole Digger Drawbar Dimensions

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Stanton
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Grosshart Post Hole Digger Drawbar Dimensions

Postby Stanton » Fri Oct 29, 2021 4:54 pm

Here are the dimensions of my Grosshart (Prewitt) Post Hole Digger drawbar. This drawbar came to me already built and it works, but the PHD hangs off the top plate by 2"+\- as seen here:
079 smaller.jpg

Let me suggest that the arms be cut approximately 4"-6" longer than listed below. Then prior to attaching the top plate to the arms, attach the arms to the finals, loosely mount your top plate, get your PHD set upon the plate, and connect the PHD to your particular drive setup from the PTO (because that distance may vary). Once all that is set, then you can accurately mark the mounting hole locations into the top plate and cut off the arms to be flush with it.

All connecting hardware is 1/2" (top plate to arms), while all implement mounting holes are 3/4" (final drives and top plate).

Drawbar consists of (3) items:
  • Left arm: 3"x2"x1/4" thick angle iron, 20" long (suggest 24" or 26")
  • Right arm: 3"x2"x1/4" thick angle iron, 20" long (suggest 24" or 26")
  • Top plate: 29-1/4"x4"x1/2" thick top plate

IMG_4542.JPG
Drawbar with front of Cub to the left; rear of Cub to the right.


Each arm lines up with and connects to (3) bolt holes in each final drive, starting from the second hole from the front (as seen below, from left to right):
IMG_4553.JPG
(3) final drive bolt holes and open space for final drive hub.

The hole measurements should be taken from your own final drive to ensure alignment, but all Cubs are standard. Starting from the end opposite the top plate, the first hole is 1-1/4" to centerline, then 6-5/8" and 9-5/8". The cutout open space for the final drive hub is 2-3/16" from the end and about 3-1/2" long. The cutout is about 1-1/2" deep at its elliptical center.
IMG_4549.JPG

IMG_4551.JPG

IMG_4552.JPG


The top plate has (2) holes that line up with your PHD's base. Use that to align and measure the holes once your PHD is temporarily in place and connected to the PTO.

The other holes are just arbitrary connecting bolts/holes that hold the top plate onto the arms. They are set back from each edge about 1".
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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby Lt.Mike » Fri Oct 29, 2021 7:06 pm

Thank you for posting this. A PTO powered post hole digger has been on my radar for awhile now.
I rented a one person post hole digger once and every time it’d catch a root the handles would spin out of my grip and whip around hitting me like two Billy clubs. In all my years working for the Sheriffs Office and in a jail I never got so beat up or felt like I was in a fight for my life as I did working with that thing !
Never again. If I dig again it’ll be with one of these. ;)
Quote by Gary Pickeral I like
"If it can cast a shadow, it can be restored"

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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby SamsFarm » Sat Oct 30, 2021 9:21 pm

Looks cute, but also dont look very user friendly!

Will it spin a 24" auger?
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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby JRS » Sun Oct 31, 2021 12:09 pm

My paperwork says auger specifications 6,9,10 or 12-in diameter. There is a extra length feed screw available for5-foot drilling depths and a post puller attachment for pulling posts straight out of the ground. Does anyone know what the post puller looks like I don’t have a pic of it. What size augers do you guys have

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Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
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Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)

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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby SamsFarm » Sun Oct 31, 2021 7:03 pm

Does that thing swivel side to side or angle front to back?

How do you make a hole that is plumb on a 20% grade?

Looks like it is mounted pretty firmly!

Stanton, it looks like you need to get that auger dirty! :)
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Stanton
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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby Stanton » Mon Nov 01, 2021 5:42 am

I've got the 9" and 12" augers. Here's a brochure of its capabilities:
Grosshart Post-Hole Digger1.JPG

Grosshart Post-Hole Digger2.JPG


And another showing the puller on page 2:
Grosshart Post-Hole Digger Brochure001.jpg

Grosshart Post-Hole Digger Brochure002.jpg
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F38 Disk
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Fast Hitch CS Bell 60 Grain Mill
Home Made Fast Hitch Potato Plow
54A Blade

Couple 1948 Cubs
172 Runner Planter
53 Fertilizer
Cub-3 Field Cultivator
Cub-189 Two Way Plow
Cub-22 Sickle Bar Mower
Mechanical Transplanter with side mount barrel (needs a fast hitch adapter) :)

Misc Belly Mowers

Wish List
International 100 Fast Hitch Blade
Mott Fast Hitch Flail Mower

Wish Wish Wish List
Fast Hitch Rotary Hoe
4E hammer mill
Location: Ne Ohio

Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby SamsFarm » Sun Nov 28, 2021 2:43 am

One nice thing is that it goes straight up and down!

You dont have to move the tractor to compensate for the arc of the three point augers or the loader mounted ones.
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Re: Grosshart Post Hole Digger Drawbar Dimensions

Postby SONNY » Sun Nov 28, 2021 5:08 pm

Interesting unit for sure! ---- as for the auger size, ---- 12" max is as far as you could push that unit. a 24" would be in a whole different class of diggers like the hydraulic drive units for skidloaders.
I used to dig a LOT of holes with the 1-man digger and was satisfied with them. The last 6 holes I dug were here for the gate posts around the garden and I dug them by hand with the 10' long handle linemans shovels that they used in the 30's to dig power poles in with! lol!


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