Shop Floor Talk  

Go Back   Shop Floor Talk > Welding and Metalworking Forums > Machining

SFT Search:   
Reply
 
Thread Tools Display Modes
  #1  
Old 03-13-2019, 10:33 PM
Ironman's Avatar
Ironman Ironman is offline
Iron Modification Investigator
 
Join Date: Feb 2008
Location: Warburg, Alberta, Canada
Posts: 13,255
Default Strange job

I was brought a straw chopper/fan hub driven by a hydraulic motor, and the keyway in the hub was wallowed out to better than 1/4". Kind of bullshit setup anyway with a .981 shaft on a Parker orbital motor, and a 3/8 keyway, stepped to 1/8" in the hub.
For some reason, although I took pictures of it, they have left the building. It was green colored....and had a protruding stub shaft, 25mm x 4" going into a 2" hub that had a 6" drum welded to it with a spider. The hydraulic motor was mounted in a tube that fit inside the 6" drum and the motor shaft fit into a blind keyed hole in the 2" round part.
So I figured to chuck it into the lathe and grab it by the 25mm stub, bore it out to 1.75" and machine a collar to fit. As this thing is about 12", it almost rotated but hit the ways and needed another 1/4" of room. I farmed out the hub and got to it with the rest. When I get the hub bored out I will drill 3/4" holes in the drum so I can stick a rod through the hole and plug weld the new collar into the bored out hub.

Today I got a call from the big lathe operator. The stub shaft is significantly bent in relationship to the hub. I called the customer and now he tells me that last fall, some parts broke off inside the combine and the straw blower ate it. That would make sense. Not worth the repair so he will have to get the green one. I have cut a key in the backside of the motor shaft, but that will not interfere with the stepped key they have at JD.
I may have to eat this, I'll think about it.
Attached Thumbnails
Click image for larger version

Name:	DSC03726.jpg
Views:	60
Size:	190.8 KB
ID:	149935   Click image for larger version

Name:	DSC03727.jpg
Views:	62
Size:	194.5 KB
ID:	149936   Click image for larger version

Name:	DSC03728.jpg
Views:	63
Size:	190.5 KB
ID:	149937   Click image for larger version

Name:	DSC03729.jpg
Views:	62
Size:	185.1 KB
ID:	149938  
__________________
Gerry
You got freedom of speech, if you don't say too much.
Aaron Neville

"I must abide by my core values, my ethical responsibilities and constitutional obligations. There can be a cost to acting on one’s principles, but there is a bigger cost to abandoning them.” Jane Philpott
Reply With Quote
  #2  
Old 03-13-2019, 11:32 PM
MetalWolf's Avatar
MetalWolf MetalWolf is offline
Lubrication Consultant
 
Join Date: Jan 2011
Location: LaVernia,Tx.
Posts: 2,756
Default

Quote:
Originally Posted by Ironman View Post
I was brought a straw chopper/fan hub driven by a hydraulic motor, and the keyway in the hub was wallowed out to better than 1/4". Kind of bullshit setup anyway with a .981 shaft on a Parker orbital motor, and a 3/8 keyway, stepped to 1/8" in the hub.
For some reason, although I took pictures of it, they have left the building. It was green colored....and had a protruding stub shaft, 25mm x 4" going into a 2" hub that had a 6" drum welded to it with a spider. The hydraulic motor was mounted in a tube that fit inside the 6" drum and the motor shaft fit into a blind keyed hole in the 2" round part.
So I figured to chuck it into the lathe and grab it by the 25mm stub, bore it out to 1.75" and machine a collar to fit. As this thing is about 12", it almost rotated but hit the ways and needed another 1/4" of room. I farmed out the hub and got to it with the rest. When I get the hub bored out I will drill 3/4" holes in the drum so I can stick a rod through the hole and plug weld the new collar into the bored out hub.

Today I got a call from the big lathe operator. The stub shaft is significantly bent in relationship to the hub. I called the customer and now he tells me that last fall, some parts broke off inside the combine and the straw blower ate it. That would make sense. Not worth the repair so he will have to get the green one. I have cut a key in the backside of the motor shaft, but that will not interfere with the stepped key they have at JD.
I may have to eat this, I'll think about it.
That might be, a bit tough on the dentures I mean teeth. ya think...
__________________
MetalWolf, AKA---- Metallic Shapeshifter-----

I Have Only One Wish To Achieve "Pura Vida" In All That I Do!
Reply With Quote
  #3  
Old 03-14-2019, 08:56 AM
greywynd's Avatar
greywynd greywynd is offline
I can dig it
 
Join Date: Dec 2005
Location: Wainwright, Alberta
Posts: 4,511
Default

Glad to see chips coming off the mill again!

Isn’t ag repair work fun?

Actually I’ve found that half of the time spent on repair work is trying to diagnose what happened and decipher damage. And there’s often the times that you later find out the ‘well, this is what happened’ and it would have saved a lot of time had the story came out at the beginning.


Sent from my iPhone using ShopFloorTalk mobile app
Reply With Quote
  #4  
Old 03-14-2019, 09:13 AM
MetalWolf's Avatar
MetalWolf MetalWolf is offline
Lubrication Consultant
 
Join Date: Jan 2011
Location: LaVernia,Tx.
Posts: 2,756
Default

Quote:
Originally Posted by greywynd View Post
Glad to see chips coming off the mill again!

Isn’t ag repair work fun?

Actually I’ve found that half of the time spent on repair work is trying to diagnose what happened and decipher damage. And there’s often the times that you later find out the ‘well, this is what happened’ and it would have saved a lot of time had the story came out at the beginning.


Sent from my iPhone using ShopFloorTalk mobile app
Amen, To that. ones I hate the worst. Is some will only tell ya bits and pieces of the desired info! and then by the time you waste to gather it here and there from them, you are like why didn't you tell me that to begin with.
__________________
MetalWolf, AKA---- Metallic Shapeshifter-----

I Have Only One Wish To Achieve "Pura Vida" In All That I Do!
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Web Search:

All times are GMT -5. The time now is 12:45 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.