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What is the most positionally rigid 12 inch manual rotary table?
My 12" Yuasa has dual locks on the table and another lock on the worm gear. It does not move at all when machining. The only bad part is it is very heavy and can be a real pain to put it on the mill. -
L
Bearing C3 vs C2
The main deciding factor for which clearance to use is are the bearings pressed on to the shaft which will stretch the inner race a tiny bit and is the outer race also a press fit which will shrink the outer race a tiny bit? If so then some of the clearance will disappear and you need C3... -
L
corrosion resistant Brass or Bronze
I don't think there is any alloy of brass or bronze that does not tarnish. The most corrosion resistant bronze is nickel aluminum bronze C955 as far as I know. It is commonly used when the bronze will be exposed to sea water. But even it will tarnish in air over time. Plumbing parts and... -
L
Victor 400 x 750 lathe
In the USA it would be a Victor 1630 but why are all the controls on the carriage reversed? Does this one have a inch or metric lead screw? Looks to be of late 1970's vintage and the emergency stop switch has been added. I have a Victor 1640 made in 1976 and yes many parts and the manuals are... -
L
Huge dealer markup on hydraulic pumps!
A 4000 psi hydraulic gear pump failed. Bearings wore out and the gears machined away the body so not rebuild-able. Not sure why it failed as it only had 1400 hours on it and the oil and filter were always changed at the recommended intervals. My local dealer wanted $800 for a new pump and I... -
L
What's with auction 'Rigging" costs??
My last auction I was interested in a Sunnen honing machine that was newer than the one I have. It only needed to be moved 1/2 mile to my shop. The cost to move it was $600 and as there was no loading dock I would also be charged a lift gate fee of $150 at pick up and delivery. So $900 to move... -
L
Cutting a key seat in case hardened 8620?
EDM, I was wondering about that but thought it would be expensive? As for using a surface grinder to get through the case, did not think about that. I have an old B&S #2 surface grinder but don't have any small wheels for it. I also have an air powered grinding spindle for my mill that can hold... -
L
Cutting a key seat in case hardened 8620?
So I screwed up and forgot one woodruff key seat I needed on a 8620 shaft. I have already case hardened it to rockwell C 62 and abut .020" thick case. All my key seat cutters are HSS and I am guessing they won't work for this? So will a solid carbide cutter work or do I need to start over? The... -
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Round Dial 10EE FS on MArketplace in Michigan for $750
My father worked at Rocketdyne in the 1960's and told me many stories about the Santa Susana test area. He was an engineer working on the fuel pumps for the F-1 engine on the Apollo mission. Prior to that he was designing the fuel pumps for the X-15 while working for Hamilton Standard in...- Laverda
- Post #5
- Forum: Antique Machinery and History
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Bridgeport Mill Replacement
I would not hesitate to buy a used rebuilt Bridgeport. My current one which is a 9 x 48 series 1, 2HP made in 1980 was rebuilt to as good as new about ten years ago and I bought it for $4000. That was a deal. Customer sent out to be rebuilt and it took too long so they bought a new one and had... -
L
Any suggestions for metrology equipment repair? caliper, micrometers etc
Here is who I use. https://www.mainelygagerepair.com -
L
Boring a taper?
Although only a single cylinder bike, it has four main bearings. Both sides of the crank have a a ball and roller bearing. As it was designed to haul a sidecar and be abused constantly pulling lots of weight the crank assembly is way over designed. So the crank does not flex at all with the... -
L
Boring a taper?
OK, in reply to multiple people. Yes the flywheels are steel (actually forged, I thought they were cast). BSA also made cast iron flywheels for the same bike. It just depends on what year it was made. The motor is a M20, so 500cc, side valve with 13HP at 4200 RPM. It has now been turned in to... -
L
Boring a taper?
Yes, I don't care I am doing it anyway is correct! Motor started out at 500cc with 13 HP on 4.9 to 1 compression ratio. Fitted a different BSA crank with a longer stroke and it is was 600cc with 15 HP. Then bored it as big as I could with a 7 to 1 compression and it is now a 720cc and has 20... -
L
Boring a taper?
Yes it is a bike. A 1950 BSA. I am going to stroke the crank and need to move the crank pin hole after welding the existing hole up. On a bike with no taper, this is an easy job. Bore the hole, hone it to size and you are done. I have never done this on a crank with a tapered pin. Harley's have... -
L
Boring a taper?
I have never had to bore a tapered hole and don't have any tools to do so on my mill. If it could fit on my lathe I could do it but that won't work. The taper will be 6 degrees about 9/16" in depth through hole and around 1.5" in diameter. I have heard of Tree taper boring heads but they don't... -
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Victor 1640 headstock questions
Call Victor here in California. The 1640 they sell today is made in China but they still stock parts for the older Taiwan made ones. I have a 1640 made in 1976 and all the threading gears were worn out and they had them all in stock. -
L
OT: Motor Generator Experiment - Open Source Project :)
I think he is not understanding some simple points that in order for this to work, you need: 1. A motor and generator that are 100% efficient. Unfortunately they don't exist. Even with superconducting windings in both you still have to deal with friction from the bearings. You could use... -
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OT: Motor Generator Experiment - Open Source Project :)
Retired EE here with 37 years in the industry. I have not the time or desire to explain why what you are trying to do will never work. Many of the replies you have read already explained that. Have you considered that if it were possible, why the power companies don't use this method to supply...