Kubota drawbar hole diameter??

[beppington]

Went to pop in 2" ball with a 1" shaft into my Kubota drawbar ... & it doesn't fit. Dangit!

It's not like it doesn't fit by a lot, like a 7/8" shaft is needed. It's very close. It seems to be the thickness of the paint inside in the hole plus maybe a sliver more of metal.

Am I missing something? Do I need to sand the hole to get rid of the paint?

Is there actually a ball shaft with a diameter of like 31/32"??

 

[asylum575]

I'm pretty sure it's 3/4"

Hitch balls normally come in 3/4" and 1" shank for the 1 7/8 and 2" balls.

The smallest shank for the 2 5/16" is 1"

The 2 5/16" ball may have a larger shank for the 10K rating.

 

[PHILIP8N]

Try this. FYI, install nuts before using. Philip.

 

[thetooth]

I just bought a 2" ball 1" shaft from home depot yesterday it fit fine on my new to me B7500 . I measured the 2nd hole behind the large hole and it measured 3/4" .

 

[beppington]

Try this. FYI, install nuts before using. Philip.

Why did you have to go to this length? Is there some reason not to just put a ball right into the Kubota bar? (besides my little hole-too-small issue)

 

[rjkobbeman]

Try this. FYI, install nuts before using. Philip.

I would be worried about reduced tongue weight because of you effectively increasing the length of the draw bar. There is more leverage to lift the front end off of the ground. You also made it easier to bend your draw bar on the tractor (or damage related components).

I would think you vastly reduced the tongue weight your tractor can now safely carry. I'm sure an engineer can chime in with numbers, but I think those few extra inches equates to a lot of leverage.

Even if you have a load balanced so that there is not too much tongue weight, you also introduced leverage to move your rear end sideways easier. This can cause the rear end to slide when turning -- either pulling or slowing the load.

 

[beppington]

I'm pretty sure it's 3/4"

I'm talking about the biggest hole at the end of the Kubota draw bar. Definitely not 3/4". The 1" shafted ball almost fits, just not quite, & seems like probably a hair more than just paint removal would be needed.

I was think maybe it was metric :confused2:

I'll just take my circle template & measure it & see what's going on.

 

[PHILIP8N]

Why did you have to go to this length? Is there some reason not to just put a ball right into the Kubota bar? (besides my little hole-too-small issue)

I can use different drawbars to move ball height up and down. I can also quickly switch between ball diameters. Philip.

 

[PHILIP8N]

I would be worried about reduced tongue weight because of you effectively increasing the length of the draw bar. There is more leverage to lift the front end off of the ground. You also made it easier to bend your draw bar on the tractor (or damage related components).

I would think you vastly reduced the tongue weight your tractor can now safely carry. I'm sure an engineer can chime in with numbers, but I think those few extra inches equates to a lot of leverage.

Even if you have a load balanced so that there is not too much tongue weight, you also introduced leverage to move your rear end sideways easier. This can cause the rear end to slide when turning -- either pulling or slowing the load.

I have had 750 pounds tounge weight on this without a problem. Seriously now, we are moving a trailer from the back of the shed to the front of the shed at 4 mph, not going down the highway at 70 mph.

I normally use this set up so I don't have to mess with the trailer jack. Again, I have had up to 750 pounds tounge weight on this many times without a problem. Philip

 

[rjkobbeman]

I have had 750 pounds tounge weight on this without a problem. Seriously now, we are moving a trailer from the back of the shed to the front of the shed at 4 mph, not going down the highway at 70 mph.

I normally use this set up so I don't have to mess with the trailer jack. Again, I have had up to 750 pounds tounge weight on this many times without a problem. Philip

Fair enough.

 

[Chilly807]

If it were me I'd take a rat-tail file to the drawbar.

Sean

 

[k0ua]

A Dremel tool with a round sanding drum, would make short work of the problem also. then put a little grease on the surface with your finger, and put in the ball, and tighten the heck out of the nut and your good to go.

 

[beppington]

Before I got a chance to actually measure the drawbar's hole, my dealer responded to my email about this with: "I don't know why, but it's like a 15/16" hole; kinda dumb. But anyway, I would just use a 7/8" ball and tighten it down good so it doesn't flop around- it should be fine."

 

[Larry Caldwell]

The hole is probably metric, maybe 24mm. I would take the drawbar to a machine shop and have them drill it out to 33/32 (26mm). Or you could get a Demming bit for your 1/2" drill motor and do it yourself. Then you would be set for any ball or hitch pin 1" or smaller. If you want a smaller pin to fit tightly, just use a bushing.

 

[LD1]

If it is as close as you say...Just a little paint and maybe just a sliver of metal...........GET A BIGGER HAMMER:laughing:

 

[beppington]

Just gave in & bought another $7 2" ball at HD with a 3/4" shaft. I'll put a bushing in it & be done.

 

[Chilly807]

Sounds like a plan, assuming of course the bushing fits in the hole...

Hang on to the receipt from HD, you may be back sooner than you thought.

In all seriousness, good luck.. it probably IS metric. I think the one I put in was 7/8 and a little sloppy, but I can't remember for sure.

Sean

 

[beppington]

Sounds like a plan, assuming of course the bushing fits in the hole...

Little piece o' PVC, cut to length & sliced on its side to fit, outta do it :thumbsup:

 

[SPYDERLK]

Before I got a chance to actually measure the drawbar's hole, my dealer responded to my email about this with: "I don't know why, but it's like a 15/16" hole; kinda dumb. But anyway, I would just use a 7/8" ball and tighten it down good so it doesn't flop around- it should be fine."

Ive seen them with 3/4 and 1" shanks. No 7/8". Anybody?
larry

 

[tallyho8]

I needed a 2 5/16 ball on mine and they have 1" shafts. I bought a 1" drill bit with a 1/2" shank and put it on my drill press and 15 seconds later the ball fit perfectly.