Line Boring Systems

[BuMach]

I gonna do that. If something comesip i might give you a message. 6thou aussie dollars is not to bad.

 

[StanRUS]

I gonna do that. If something comesip i might give you a message. 6thou aussie dollars is not to bad.

Lots info on the net examples http://www.spaceagecontrol.com/calccabl.htm
Tables http://www.practicalmachinist.com/vb/general-archive/forrest-i-found-wire-sag-table-93414/ scroll downward in thread

How to ship stern tubes http://www.shipsuperintendent.com/Welcome/(S) A108.pdf

 

[StanRUS]

Movie time, slow motion cutting tool https://youtu.be/mRuSYQ5Npek
T.I.N coated HSS prevents Built Up Edge

Climax Facing & Grooving Head with extended slide https://youtu.be/mGJi3oppvkM
These guys have the power turned to minimum...Cmax recommended 100 revs; we've been using MAX revs (approx 180rpm) with the Milwaukee motor machining off 0.200" plus 6.900" dia to 11.000" diameter faces average time approx 17minutes

 

[RayF]

You can make your own. Hofmanns have just put it in a ready to use package. My experiance with laser is very limited. I did a crank tunnel bore on a 36 series Cat. We tried to use a laser but every time someone in the shop thumped someting or used the crane the laser vibrated and we had to start again. We went back to the piano wire.
The tolerances were .0015 alignment between bores and not more than .003 over the 7. We got it to .0015 over the 7. So it does the job and is more than accurate enough when working on earthmoving gear.

 

[StanRUS]

You can make your own. Hofmanns have just put it in a ready to use package. My experiance with laser is very limited. I did a crank tunnel bore on a 36 series Cat. We tried to use a laser but every time someone in the shop thumped someting or used the crane the laser vibrated and we had to start again. We went back to the piano wire.
The tolerances were .0015 alignment between bores and not more than .003 over the 7. We got it to .0015 over the 7. So it does the job and is more than accurate enough when working on earthmoving gear.

Ray, does Hofmanns make a 40mm alignment kit? Another question, do you have to check the tension scale's calibration from time to time?
The CNC bloke south of you; his wire tensioner look like a T-handle torque wrench that twist the wire to set tension.

Lasers are IMO overkill & fussy to use; just not required on mining-construction type of equipment. OEM's specifications typically can be (are) 0.002" +/- @ 10ft spread for 2-4 bores in line. Cat's manufacturing shop floor prints state, 'bore 2 holes in line +/- 0.002"...those prints were sent to another Aussie forum member who works for West-Trak

 

[RayF]

Ray, does Hofmanns make a 40mm alignment kit? Another question, do you have to check the tension scale's calibration from time to time?
The CNC bloke south of you; his wire tensioner look like a T-handle torque wrench that twist the wire to set tension.

Lasers are IMO overkill & fussy to use; just not required on mining-construction type of equipment. OEM's specifications typically can be (are) 0.002" +/- @ 10ft spread for 2-4 bores in line. Cat's manufacturing shop floor prints state, 'bore 2 holes in line +/- 0.002"...those prints were sent to another Aussie forum member who works for West-Trak

The only standard kit is 2 inch. I imagine they could do whatever dia. I haven't seem Maccas tenshioning method but a torque set up would work. Ive not checked my scale. If I was going to do a super accurate job I would. The tension is 40kg. The tension is easily set.
Cat likely need to take notice of there own specs. I've checked the ends of plenty of new 994 loader frames that have been 12 to 14 thou out in the length of the bore. Geographe make a mod for the bucket hookup and require a 4 thou alignment. I had the job of checking them at Westrac before they were done.

 

[Nige]

Cat likely need to take notice of there own specs. I've checked the ends of plenty of new 994 loader frames that have been 12 to 14 thou out in the length of the bore. Geographe make a mod for the bucket hookup and require a 4 thou alignment. I had the job of checking them at Westrac before they were done.

Why does that not surprise me ...? Over the years I've had 994A/D/F loader frames (and buckets) so bad alignment-wise that you couldn't get the pins in ..... in one dealership we got to the stage of checking bore alignment on new machines and reworking if necessary before even starting the machine assembly.

 

[StanRUS]

Line Boring Systems & Borewelders

Why does that not surprise me ...? Over the years I've had 994A/D/F loader frames (and buckets) so bad alignment-wise that you couldn't get the pins in ..... in one dealership we got to the stage of checking bore alignment on new machines and reworking if necessary before even starting the machine assembly.

You would not believe (circa 2000) some of ‘mickey mouse BS’ that goes on @ Cat subsidiaries! Couple of examples; Mitutoyo portable Rockwell hardness tester, non-op...using sub’s non-calibrated HR tester (non-calibrated equates to guessing)...Mitutoyo Surface Profile Meter non-op, relying on ‘theoretical surface finish’ machining settings…

BuMach,
Auto feed face welding attachment (Climax-$1300.00)...we’re trying to shrink this unit to keep the support arm closer to the work-surface & couple of additional improvements. When I've got worked out I'll let you know Climax photos

 

[Nige]

You would not believe (circa 2000) some of ‘mickey mouse BS’ that goes on @ Cat subsidiaries! Couple of examples; Mitutoyo portable Rockwell hardness tester, non-op...using sub’s non-calibrated HR tester (non-calibrated equates to guessing)...Mitutoyo Surface Profile Meter non-op, relying on ‘theoretical surface finish’ machining settings...

The Cat facility in Boksburg South Africa, formerly known as BEMCOSA (part of the Barlows Machinery emprie), where among other things the 994 buckets used to be built was one of the worst as I recall.

 

[digger doug]

The Cat facility in Boksburg South Africa, formerly known as BEMCOSA (part of the Barlows Machinery emprie), where among other things the 994 buckets used to be built was one of the worst as I recall.

It sounds to me like someone is trying to weld the finish machined bushing in, held in an alignment fixture.
to save the final, in place machining (which would be a major cost savings, hence the pressure to implement)

Might have worked good at one time, with proper procedure control, but welding procedures get lost, changed for the bean counters etc. and now
you've lost it all.

 

[clintm]

BUT BUT BUT CAT's THE BEST:notworthy

 

[Nige]

Consider this ......... discuss the origins of the expression "It's a Cat design feature - it's designed to f**k you up" .......

 

[Williams Marine]

Piano Wire
Ray F or anyone else what manufacturers do you recommend or to stay away from. Ray F hope you can take the time in your thread of here to post more pictures of your setup and the use of it.

 

[Mink]

Ils possible to do if your self a piano wire alignement system ?

 

[StanRUS]

Ils possible to do if your self a piano wire alignement system ?

YES...very, very low cost!!!

 

[Mink]

Stanrus would you be intertested to give me informations to make it ?

 

[Williams Marine]

Please share your information, thanks.

 

[StanRUS]

Stanrus would you be intertested to give me informations to make it ?

Working on that Mink...what brand boring machine do you have? ELSA, BRS, B&D etc

Archived link: http://web.archive.org/web/20100602...wrightmasters.com/School/tight_wire-sag_1.htm

 

[Mink]

Thanks Stanrus. Its DIY boring machine. Similar principle as Elsa or Sir.

 

[Williams Marine]

I've been perfecting my line boring the past few days. Only got it this past Wednesday after much care unpacking it and going over each thing with my son, we have had it up and running on some scape pipe I picked up.
Great time, I understand now why you guys do it. My son said it gave him satisfaction, ask him to explain, said it is doing such precision type work. Probably have spent more quality time with him in the past few days in the shop then in a long time.
His IPhone sits in the house, that says something for an 18 year old, he was worried the other night I was going to dive into the bore welding without him, I think he almost was going to tell his girlfriend he had other stuff going on.
We have been trying a few different feed rates and bar speeds, what is a good rule of thumb? What is one looking for to get the optimum production?
Thanks for the information and support.