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Monarch 10ee round dial Repair
- Thread starter vettebob
- Start date
- Joined
- Nov 16, 2012
- Messages
- 5,596
Really nice job on that gear repair!
From my experiences doing TIG weld build-ups with ER70s, the weld cap is pretty hard and will dull HSS very quickly -can even give carbide a run for it's money even after all the irregular surfaces are leveled-out. I've never measured the hardness but if I had to take a guess, I'd estimate around 45 RC (purely a guess based on machining metal known to be that hard). Mind you, my experiences are limited to repairing shafts with butchered key slots and the repairs are all done with the lathe. Most of the time, I cannot normalize and re-harden the workpiece because I don't really know what the metal is.
Also, yes, if you knew what metal that gear was made of and if you tried to heat treat it, it would warp due to the stresses imposed by the welding. That center hole would probably go out-of-round is my guess. Right on... leave it alone.
Again... nice repair.
Ray
From my experiences doing TIG weld build-ups with ER70s, the weld cap is pretty hard and will dull HSS very quickly -can even give carbide a run for it's money even after all the irregular surfaces are leveled-out. I've never measured the hardness but if I had to take a guess, I'd estimate around 45 RC (purely a guess based on machining metal known to be that hard). Mind you, my experiences are limited to repairing shafts with butchered key slots and the repairs are all done with the lathe. Most of the time, I cannot normalize and re-harden the workpiece because I don't really know what the metal is.
Also, yes, if you knew what metal that gear was made of and if you tried to heat treat it, it would warp due to the stresses imposed by the welding. That center hole would probably go out-of-round is my guess. Right on... leave it alone.
Again... nice repair.
Ray
Here are some pictures of my latest repairs. The forward and reverse gear's bearing surface in my headstock were shot so I turned then ground the shafts with my small homemade grinder then turned and installed bronze iolite bushings.
View attachment 64612 It took a couple of days to do but hopefully it will last another 20 or 30 years. Bob
View attachment 64612 It took a couple of days to do but hopefully it will last another 20 or 30 years. Bob
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I found new Timken bearing set 28580/28521 Class 0 tapered roller for the rear spindle $200
New Departure c8504 for the belt tensioner $17 each at Locate Bearings. Bob
They also have the Front bearing set 29580/29521B Class 0 set for $370 But my front spindle bearings look good. I will check them when I get the headstock back together again and order them if needed. Bob
I found new Timken bearing set 28580/28521 Class 0 tapered roller for the rear spindle $200
New Departure c8504 for the belt tensioner $17 each at Locate Bearings. Bob
They also have the Front bearing set 29580/29521B Class 0 set for $370 But my front spindle bearings look good. I will check them when I get the headstock back together again and order them if needed. Bob
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- Joined
- Sep 3, 2011
- Messages
- 478
That's a real good price for class 0 bearings. A set of class 3 front and rear bearings (which is the next class down from class 0) for my Van Norman mill was $504. Class 0 weren't available, short of a special order. I think you'd be silly not to grab the class 0 front bearings at that price.
Cal
I took my 10EE bed to get it reground yesterday I was quoted not to exceed $1600 at KC Machine. Won't get it back until January sometime
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I also bought a Like new import 6x18 Surface grinder for $800 and $100 in gas to regrind my saddle and cross slide to prep for Moglice or Turcite. I've never used a surface grinder before. Hopefully it's not too difficult to use. I am the third owner and it's original wheel is like new. I think the people who had it before didn't have a clue. The shipping grease is still on the ball ways. The spindle was slid out and barely coupled to the motor and the wheel wasn't balanced causing vibration.
Cal I will probably buy the front bearing set as well, I just have to make some more money to support this hobby.
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I also bought a Like new import 6x18 Surface grinder for $800 and $100 in gas to regrind my saddle and cross slide to prep for Moglice or Turcite. I've never used a surface grinder before. Hopefully it's not too difficult to use. I am the third owner and it's original wheel is like new. I think the people who had it before didn't have a clue. The shipping grease is still on the ball ways. The spindle was slid out and barely coupled to the motor and the wheel wasn't balanced causing vibration.
Cal I will probably buy the front bearing set as well, I just have to make some more money to support this hobby.
- Joined
- Sep 3, 2011
- Messages
- 478
Nice work.
That part is overdue for redesign. Every one that I've come across is bent. I don't know why they used such a large diameter pin.
Cal