Backhoe Added a ripper to my Woods BH90x: Trees beware

[nickel plate]

Those McMaster alignment pins are a lot less expensive then what a machinist is going to charge you for 30 mins.

I opened that link yesterday and if I remember correctly they only go up to 1-1/4" diameter-my pin is 1-1/2".

 

[IslandTractor]

I opened that link yesterday and if I remember correctly they only go up to 1-1/4" diameter-my pin is 1-1/2".

I discovered the same. Unfortunately I don't think 1-1/4" is going to be close enough although perhaps combined with chamfering on the pin itself it could work. Although McMaster Carr calls them alignment pins that does not seem to be a standard name as a google search on that term doesn't come up with other suppliers. I guess 1-1/2" bolts are not used in steel building or bridge construction which is likely the main use for these things.

 

[wedge40]

i still say I'd figure out how to make a rolling base for the ripper. Something you could roll into place and then put legs down to make it stable. Made out of wood with casters. Should take an hour or so to put together.

Wedge

 

[JFS2295]

..... Although McMaster Carr calls them alignment pins that does not seem to be a standard name as a google search on that term doesn't come up with other suppliers. I guess 1-1/2" bolts are not used in steel building or bridge construction which is likely the main use for these things.

The real name for these are Bull Pins or Drift Pins. Drift pins have a taper on both ends, bull pins have either a head or no head, depending what you are using them for.

Man .... 1.5" pin. The Arps pins are not that large. I've not seen them that large either. I guess you guys are back to straight rod and a lot of grinding.

 

[IslandTractor]

I suppose a 1.25" tapered "bull" pin combined with the actual 1.5 bucket pin would work together if we chamfer the bucket pin down to 1.25". The bull pin could go in first followed by the chamfered pin. The chamfer would need to be as shallow as possible without extending into the bearing surface.

 

[JFS2295]

Years ago I have made bucket pins that were 1/2" longer so I could chamfer that 1/2". Plus my "alignment" pin is only 1/8" smaller then the real pin.

Maybe with a bull pin you could plug weld or braze on some 1.25" ID x 1.375" or larger OD tubing so only a small amount needs to be ground with a chamfer to continue the taper.

 

[IslandTractor]

Years ago I have made bucket pins that were 1/2" longer so I could chamfer that 1/2". Plus my "alignment" pin is only 1/8" smaller then the real pin.

Maybe with a bull pin you could plug weld or braze on some 1.25" ID x 1.375" or larger OD tubing so only a small amount needs to be ground with a chamfer to continue the taper.

Good idea.

 

[nickel plate]

I went over to my local hydraulic shop who built the grapple hoses, explained that I needed about a foot or so of 1-1/2" solid round stock but I was concerned about the surface finish possibly scratching the dipper stick, hydraulic thumb and ripper tooth pin shaft surfaces. Glad I brought that up because the shop's owner took me over to the scrap bin where I found this castoff 1-1/2" chromed hydraulic cylinder rod. He handed it to me and said, "Happy new year!".
I started the small nubbed end on the opposite side of the Woods pin and working them in unison, got the Woods pin set in place in about five minutes.

 

[IslandTractor]

Lucky duck!

 

[jake98]

A piece of 1" sched. 40 black pipe would probably be just about right.