Pins for Hydraulic Rams

[mar]

Does anyone know of any websites where I could buy pins like these for a hydraulic ram on a front end loader. All the websites seem to sell hydraulic rams and every other part like bushes, hoses, seals that you would need for hydraulic rams except the pins.
I found this website in New Zealand but the prices are very expensive compared to Ireland or the UK.
https://www.partsdirect.farm/search...=34&Category-2=650&Category-3=0&cid=650&mid=0

The pins I am looking for are 30mm and 35mm diameter

 

[Nearly]

@Dave ?

 

[shumungus]

RAMKO, on your doorstep.

Hydraulic Rams :: Buy Hydraulic Cylinders Online - Ramko - Ramko Hydraulic Cylinders

The UK's number 1 hydraulic cylinder supplier.

ramko.co.uk

 

[mar]

RAMKO, on your doorstep.

Hydraulic Rams :: Buy Hydraulic Cylinders Online - Ramko - Ramko Hydraulic Cylinders

The UK's number 1 hydraulic cylinder supplier.

ramko.co.uk

I need pins that have a grease nipple in the centre of the pin, from what I can see from the photo and looking at photos of the rams it looks like you can only grease them from the end of the ram. I will give them a call tomorrow anyway

 

[howit]

Try digbits

 

[pat kcotnit]

Pin - KRAMP

Discover Pin at KRAMP. You can find the largest range of Pin products online. It's that easy!

www.kramp.com

Various lengths here but you would need to adapt them for grease nipples.

 

[tinman]

I need pins that have a grease nipple in the centre of the pin, from what I can see from the photo and looking at photos of the rams it looks like you can only grease them from the end of the ram. I will give them a call tomorrow anyway

For what it's worth Mar,
If the pin in the picture hadn't of had a grease hole in it I doubt I'd of been having to fix it. .
In the repair I specifically went out of my way to source a pin with no grease hole in it.
A 5mm hole down the middle of the oem pin weakened it far too much.

Your pin won't be under as much pressure as this one was but still.

Grease it from the Bush on the ram I say, it mightnt look as aesthetically pleasing but a better job Imo.

 

[Andrew]

Does anyone know of any websites where I could buy pins like these for a hydraulic ram on a front end loader. All the websites seem to sell hydraulic rams and every other part like bushes, hoses, seals that you would need for hydraulic rams except the pins.
I found this website in New Zealand but the prices are very expensive compared to Ireland or the UK.
https://www.partsdirect.farm/search...=34&Category-2=650&Category-3=0&cid=650&mid=0

The pins I am looking for are 30mm and 35mm diameter

View attachment 849296

Those pins are the work of the devil, they tend to snap where the grease hole is. I would be tempted to replace with a normal pin and fit a grease nipple somewhere else.
If not, have you got a local machine shop would make you some? Manufacturers tend to get pins like that made their drawings so you may struggle to find them off the shelf - the manufacturer may even be the cheapest place as they can source in bulk.

 

[bravheart]

Ok this might be total rubbish but
Back in biology lessons many many years ago I can remember doing experiments on mock bones to determine their strength. This involved horizontal glass rods of the same diameter and length propped at both ends and weights hung from the middle till they broke. The rod that supported the most weight was hollow, this was used to explain why the big bones in our bodies were hollow supporting the most while cutting out excessive weight.
Using this I would guess drilling a hole right along a pin would actually strengthen it but drilling across it would probably create a fault line for it to break, aka shear bolt.
Long winded reply to tell you to try modifying your setup if possible.

 

[Andrew]

Ok this might be total rubbish but
Back in biology lessons many many years ago I can remember doing experiments on mock bones to determine their strength. This involved horizontal glass rods of the same diameter and length propped at both ends and weights hung from the middle till they broke. The rod that supported the most weight was hollow, this was used to explain why the big bones in our bodies were hollow supporting the most while cutting out excessive weight.
Using this I would guess drilling a hole right along a pin would actually strengthen it but drilling across it would probably create a fault line for it to break, aka shear bolt.
Long winded reply to tell you to try modifying your setup if possible.

A hole along the length of the pin make it weaker not stronger. However as the hole is along the neutral axis, it will make so little difference it won’t be noticeable.
It will however give the best strength to weight ratio - again as the material running along the neutral axis doesn't provide strength.

The cross hole will weaken the pin, how much depends on the orientation - if the hole axis is parallel to the force it will be weaker than if it is perpendicular. But as the hole runs from the neutral axis to the outside it has a much bigger effect on the strength.

 

[TheTallGuy]

Ok this might be total rubbish but
Back in biology lessons many many years ago I can remember doing experiments on mock bones to determine their strength. This involved horizontal glass rods of the same diameter and length propped at both ends and weights hung from the middle till they broke. The rod that supported the most weight was hollow, this was used to explain why the big bones in our bodies were hollow supporting the most while cutting out excessive weight.
Using this I would guess drilling a hole right along a pin would actually strengthen it but drilling across it would probably create a fault line for it to break, aka shear bolt.
Long winded reply to tell you to try modifying your setup if possible.

If our largest bones were solid they would be too heavy for practical purposes. In terms of how the forces act on the "hollow" bones - it's usually hollow along the same axis that the main force is applied rather than accross it, which would produce a shearing force.

 

[bravheart]

Thanks both, think we did another one with the same weight of glass the same length so different diameters and as far as I can recall (sadly over 50 years ago) hollow won again.

 

[bravheart]

Bones like pins usually shear across their width, I would have thought drilling a grease channel would create a shear point. Perhaps @Andrew has explained it, I'll need to sit down with a cold beer later try work it out. Have seen his trailer cad drawings so computer forces will be spot on, nothing much in school cad in my day

 

[Deutzdx3]

Had to make one of these for a local chap a while ago. Great idea in theory but as others have said has its draw back. A grease nipple else where is better.
This pin works ok on large machines as the small bore hole through the middle doesn’t weakening it to the same degree as there is more meat in in to start with.