Bridgeport Right Angle Head #3 Cracked

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restore49

Aluminum

Joined

Apr 18, 2008

Location

Central Maine

• Apr 25, 2020

• #1

Suggestions please on repair? Thinking machine a mandrill size of Quill ( or should I go .001 over?)add shim to slot .0875 clamp prepare and weld - V Utechnic Cast Rod) Head was given to me. ? Bob

 

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Brandenberger

Hot Rolled

Joined

Sep 19, 2017

• Apr 25, 2020

• #2

restore49 said:

Suggestions please on repair? Thinking machine a mandrill size of Quill ( or should I go .001 over?)add shim to slot .0875 clamp prepare and weld - V Utechnic Cast Rod) Head was given to me. ? Bob

View attachment 286263

Click to expand...

My #3 is 3.375” when neither the clamping screws or the jack screw are engaged.

 

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moonlight machine

Diamond

Joined

Nov 19, 2007

Location

marysville ohio

• Apr 25, 2020

• #3

Brandenberger said:

My #3 is 3.375” when neither the clamping screws or the jack screw are engaged.

Click to expand...

That's how I would do it. But, how in hell do you break it in the first place? There are some real rock apes in this world!

 

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restore49

Aluminum

Joined

Apr 18, 2008

Location

Central Maine

• Apr 25, 2020

• #4

Thanks - will machine tube to 3.755 .005 over size of quill. At first was thinking forgot to back off jack screw but that doesn't add up - maybe a heavy crash - dropped?? Bob

 

Conrad Hoffman

Diamond

Joined

May 10, 2009

Location

Canandaigua, NY, USA

• Apr 25, 2020

• #5

IMO, things like that are trivially easy to break if you tighten the screws with nothing inside, or attempt to put it on something undersized. Not sure how good a weld will be as full penetration is impossible. OTOH, the weld will be on the outside where the strength is needed. Weld from inside too? Not a welder and not at all a welder of cast iron, so I don't know what's possible.

 

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restore49

Aluminum

Joined

Apr 18, 2008

Location

Central Maine

• Apr 25, 2020

• #6

Will machine a .250 wide slot along the weld line in the Mandrel and install a 5" long copper strip. Hoping for full penetration.

 

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restore49

Aluminum

Joined

Apr 18, 2008

Location

Central Maine

• Apr 25, 2020

• #7

Finished - had to make 3 weld grind steps to get a good weld even having preheated - Used Eutectic Xyron 244 always had amazing luck with dirty base material - 40 years of contamination - if I could Braze that may been another way. Tightened on Quill great. What I learned___ Should have clamped the piece tighter it shrank and pulled away a tad , can see gap in top left corner of picture. May use epoxy to fill while clamped??? Bob

 

Conrad Hoffman

Diamond

Joined

May 10, 2009

Location

Canandaigua, NY, USA

• Apr 25, 2020

• #8

Dang, looks rather good!

 

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restore49

Aluminum

Joined

Apr 18, 2008

Location

Central Maine

• Apr 28, 2020

• #9

Thanks - Adjusted the Spindle Lock Nut - Moves the gear and bearing(ground spacer and lock ring capture bearing)inbound to get a good gear backlash. Was the spacer factory ground to give both good backlash and bearing preload when all was new?? Did not feel like I had any bearing preload when backlash was correct - was thinking of adding shims under spacer to adjust bearing load. Bob