Hydraulic Cylinder Problem

[Rocwin]

You can definitely get a new rod made up for less than $200. Generally we pay about $90 for a 1" diameter, 16" long piston rod, something a little larger isn't a whole lot more labour just materials.

 

[RamTruckMan]

When they make a new rod, do they chrome it, or how do they keep it from rusting?

 

[kennyd]

When they make a new rod, do they chrome it, or how do they keep it from rusting?

They use "stock" that is already chromed.

 

[wdchyd]

When they make a new rod, do they chrome it, or how do they keep it from rusting?

The rod material from a hyd shop is purchased prechrome plated in 24 ft lengths, then cut to size and machined/welded and VIOLA..!!!....New Rod.......Kinda Like these.......the lead time to have one piece chromed can be significant, but not this way.....

 

[kennyd]

The rod material from a hyd shop is purchased prechrome plated in 24 ft lengths, then cut to size and machined/welded and VIOLA..!!!....New Rod.......Kinda Like these.......the lead time to have one piece chromed can be significant, but not this way.....

Just had to show me up huh?:laughing::laughing::laughing:

 

[RamTruckMan]

Yeah, I hope to take to another machine shop and see if they can re-thread or have a new rod turned.

Another thought I had is to step the pin holes in the backhoe up to one inch and get a stock cylinder. The pin holes on my current cylinder and on the backhoe are 25mm. One inch is only 1/64 of an inch bigger. (one inch = 25.4 mm)

Does anyone know if, a one inch drill bit would stay centered, if I tried to ream the 25mm hole out to one inch. I don't want to end up with a crooked hole.
Also, if I drill a one inch hole, should the pin be one inch, also or should it be just a fraction smaller to allow for lubrication?

By the way think twice about buying imported machine or fabricated products. I bought this Nardi Backhoe (made in Italy) very well built backhoe, but there is no dealer support. Fortunately, backhoes aren't technical (just some steel with holes and hydraulic cylinders) and machine shop guys can make about anything, but it is still a hassle.

 

[RamTruckMan]

Thanks, got it.

 

[KWentling]

"Does anyone know if, a one inch drill bit would stay centered, if I tried to ream the 25mm hole out to one inch. I don't want to end up with a crooked hole.
Also, if I drill a one inch hole, should the pin be one inch, also or should it be just a fraction smaller to allow for lubrication?"

1/64" is a job for a reamer. A 4-flute drill would also work but a reamer would be better. Most cold rolled material is undersize a few thousands and may fit as is. You want a close fit as the pin will be stationary in the holes you are reaming and the clearance for turning is built into the cylinder ends.

Kim

 

[RamTruckMan]

"Does anyone know if, a one inch drill bit would stay centered, if I tried to ream the 25mm hole out to one inch. I don't want to end up with a crooked hole.
Also, if I drill a one inch hole, should the pin be one inch, also or should it be just a fraction smaller to allow for lubrication?"

1/64" is a job for a reamer. A 4-flute drill would also work but a reamer would be better. Most cold rolled material is undersize a few thousands and may fit as is. You want a close fit as the pin will be stationary in the holes you are reaming and the clearance for turning is built into the cylinder ends.

Kim

Thanks. I will see if I can round up a reamer. Products like that are so hard to find in my area. I'll do a search on net.

 

[aczlan]

Thanks. I will see if I can round up a reamer. Products like that are so hard to find in my area. I'll do a search on net.

Get a pin and try it first. You may have enough wear in the hole to let it fit in.

Aaron Z