Need help with an air hammer!

[Nylunds knives]

Hi!

For about a year ago I bought a new power hammer, a beché 65 kg, and today I was able to run it for the first time.

There was a big problem with hammer, the ram did not go up and idle at the top of the hammer cylinder as it should.
It goes up and and down with a full stroke length hitting the bottom die every time. It does not hit the bottom very hard but it hits it.
I did not find any obvious causes to the problem but will take a closer look tomorrow.

I had a similar problem with my other hammer that I was able to fix, the reason was problem with the valve. The beché does not look any thing like that hammer so I have no idea where to start to look.

Maybe any of you guys know where I should start to look? It not a very uncommon hammer and should be fairly similar to a Nazel.

Here are some pictures of the hammer from when I bough it.

Best regards
Jakob

 

[JMJones]

Can you adjust the amount the treadle is engauged when at an idle? I have a smaller self contained and I can control what the tup does when idling by adjusting a turn buckle. That hammer looks sweet.

 

[Don Hanson III]

That is a fantastic hammer! But I don't know much about air hammers...

Hopefully it is what JM said, but if you need more help, Iforgeiron has a hammer section full of hammer guys that can help.

 

[Nylunds knives]

Thanks!

Here is a video of the hammer running. As you can see it's not working at all as it should.


I cleaned and checked the "one way valve" today but did not find anything wrong with it...

I got hold of a Swedish blacksmith with the same hammer that had the same problems when he bought it but he got it sorted. Hopefully I will have it running within a few days

 

[Don Hanson III]

You will get it sorted. I bet it's something minor.

Man I really like the looks of that hammer. Nice size hammer for a knife shop!

 

[Nylunds knives]

You will get it sorted. I bet it's something minor.

Man I really like the looks of that hammer. Nice size hammer for a knife shop!

Thanks Don,

It's a very popular hammer in Europe and the 65kg is a good size hammer for damascus forging. I also have a 40kg air hammer. The other hammer also need some care but it works and I want the beche working before I start taking the smaller hammer apart.

Today I pulled the ram and found a bad rubber seal. I also checked the guides but they seem to be okay as do the pistion ring. The ram had no play back and forth where the guides are, the play are sideways and is supposed to be taken care of with the rubber seal. The rubber seal was very worn in that direction.

This is the one way valve:

This is the ram and the pistion ring.

This is the rubber seal from the stuffing box.

Best regards
Jakob

 

[Don Hanson III]

Looks like with a new seal you are good to go.

I have heard these self contained hammers are very simple, I've just never worked on one.