Machinist Work Performed By Hand

[jackieschmidt]

Sometimes a Machinist has to be called upon to do out of the ordinary things.

Last week, one of our Customers messed up the level wind screw on the Towing Winch on one of their Harbor Tugs.
The major diameter of the screw is 7 inches.
Something either fell in the diamond screw or a chunk came off and chewed it up. In all, five places were damaged.

They could not get another diamond screw for 8 weeks, so they called me out to see what I could do.

The manufacture stated the screw was made from 4140 at just 28 RC.

Five of the diamond tips were ate up. So I ground out the bad metal and we welded it up with 7018 Low High rod.

I then hand ground the screw profile back to the correct lead and shape using nothing but a 4 inch disc grinder and tiger sanding discs.

It came out really nice, if you look close, you can see lighter colored metal on the Screw, showing how much I had to weld up and grind on several of the lands.

It’s back in service.

 

[MBuechle]

Very nice. He’ll probably run that for years.

 

[jghoghunter]

Very cool. Im a industrial/commercial mostly big stuff, pipefitter by trade and love seeing your work.

 

[std7mag]

Some times ya just gotta do what you just gotta do.

Nice work!

 

[wkdickinson]

You are an amazingly talented man!

 

[JPB3]

How long did that project take ya'll ?

Good work !

 

[Hal]

Jackie
GREAT job of getting it done.
You’re handier than the average bear.
It doesn’t look like it’s your first time running a 4” grinder.

Way to show the young kids what can be done with a little try and EXPERIENCE.

You deserve a break. Go do some shooting.

Hal

 

[jelenko]

I'm also amazed at the stuff you do.

How do you know/measure if the lead angle and shape are right?

 

[AlNyhus]

That's just amazing!

 

[HTSmith]

I admire people that can just flat fix stuff. We live in a "throw it away and get a new one" world and I don't like it a bit. Nice work.

 

[Will Henry]

That's pretty good; making stuff work. Now, if you did that while wearing sandals and pajamas, you'd could be on one of those Pakistani YT channels! WH

 

[jackieschmidt]

How long did that project take ya'll ?

Good work !

I put 14 hours in to it.

As how did I arrive at the correct angle and shape. You follow the pattern of the lead and keep every thing in the middle.

Plus, I have been doing this type of stuff for a long time.

The second day, I stayed into the evening to finish it.

 

[ShtrRdy]

You continue to amaze me.

 

[Infrequent Shooter]

Jackie when the SHTF real bad, I want to be in your compound. You are The Man.

 

[ronsatspokane]

Wow, that is a lot of welding. How many amps did you need to put into it? I think about stuff like that and I don't think I have enough juice in my shop to even get started.

 

[Retired shooter]

When someone takes on repairs like this, one thing must first happen.!

The person doing the repair must first believe it can be done.

Nice job Sir.

 

[jackieschmidt]

Wow, that is a lot of welding. How many amps did you need to put into it? I think about stuff like that and I don't think I have enough juice in my shop to even get started.

I do not do the welding.
The Shipyard has skilled welders who can follow directions.

 

[round]

Did you run a dial indicator across those surfaces ?

 

[jackieschmidt]

Did you run a dial indicator across those surfaces ?

No, I used a 7” outside Mic to insure none were too high. Then slid the level wind carrier over it.
The :bronze bushings in the housing have about .030 clearance.

 

[ELR LVR]

Nice job Jackie
---
I believe that was a good choice in rod for build up too based upon the RC hardness
FYI - depending upon hardness and toughness there is also
8018, 9018, 110/18
available to closely match the parent metals
You may already be aware, just throwing it out there though
---
I've used them all
110/18 would be for AR500 plate(Dozer Blade) at the extreme end of the scale
so you could relate the various rods depending on needed properties
110 is also pretty "Watery" and difficult to weld in a 4G position
So sometimes I compromise with 9018 instead if needed