Fresh Off The CNC

[Toolman]

Prop Shaft Coupler. This coupler spins concentric and is balanced. Made from 303 s.s. Shaft sizes are 1.375/1.125. All threaded holes are fine pitch. Grooves on outside of coupler are for balance. This coupler is a direct replacement for most existing couplers.

This is a collaboration between Schiada and Collins V-Drives. Sold exclusively at D21 Enterprises.

 

[thetub]

nice:thumbup:

would be nice if the bolt holes would be big enough to fit some nice ARP 12 points.

 

[Wheeler]

Very nice! :thumbup::thumbup:

 

[Toolman]

nice:thumbup:

would be nice if the bolt holes would be big enough to fit some nice ARP 12 points.

Stan got some ARP s.s. bolts but they were 3/8 12 point (head size). We need 5/16 12 point. We're waiting for the right bolts.

 

[1homeblown]

Dang I wish they would stop coming out with trick, badass parts that I must have. [emoji41]. What are the prices? Inquiring minds want to know!!!!

 

[Toolman]

Dang I wish they would stop coming out with trick, badass parts that I must have. [emoji41]. What are the prices? Inquiring minds want to know!!!!

Bolts is the question right now. Soon as we get that straightened out, pricing will follow.

 

[aaronschiada]

this is not a smart ass question. if you aren't sure of what bolts you will be using, then how will you know the true balance of the coupler if you've already manufactured it? i would assume that length, head shape, and material would make a ton of difference in the final product. again, not being a smart ass. anything to pull as much vibration out of the prop shaft is great!

 

[Toolman]

this is not a smart ass question. if you aren't sure of what bolts you will be using, then how will you know the true balance of the coupler if you've already manufactured it? i would assume that length, head shape, and material would make a ton of difference in the final product. again, not being a smart ass. anything to pull as much vibration out of the prop shaft is great!

OK smartass!!!! lol Just kidding! This coupler is balanced to the standard bolts the other couplers use now (steel). If I can't get the same configuration in stainless, then it will be the standard (steel) bolt. My bolt guy is hunting as we type.

 

[aaronschiada]

OK smartass!!!! lol Just kidding! This coupler is balanced to the standard bolts the other couplers use now (steel). If I can't get the same configuration in stainless, then it will be the standard (steel) bolt. My bolt guy is hunting as we type.

got it. thanks. how out of balance are the standard ones in comparison?

 

[Toolman]

got it. thanks. how out of balance are the standard ones in comparison?

The current couplers have the shaft bore off center about 3/32" to compensate for out of balance condition. The balancing people I talked to say when u throw the main body of something off center, it needs counterweights like a crankshaft to do it right. Stan has an old concentric coupler that someone drilled 3/16'' holes the full length of the part ( a series of 5 holes on an arc which would have taken forever) in the same area as my grooves. He says it works great.

BTW, this is not an exact science. When I get the right bolts, I will check my work for balance. Trying to avoid dynamic balancing $$$$$$$

But to answer ur question, I don't know exactly how out of balance the current coupler is. I need to get one from Stan and compare the two.

 

[thetub]

would be awesome if you could make up some ss safety collars the same way...:thumbup:

 

[aaronschiada]

The current couplers have the shaft bore off center about 3/32" to compensate for out of balance condition. The balancing people I talked to say when u throw the main body of something off center, it needs counterweights like a crankshaft to do it right. Stan has an old concentric coupler that someone drilled 3/16'' holes the full length of the part ( a series of 5 holes on an arc which would have taken forever) in the same area as my grooves. He says it works great.

BTW, this is not an exact science. When I get the right bolts, I will check my work for balance. Trying to avoid dynamic balancing $$$$$$$

But to answer ur question, I don't know exactly how out of balance the current coupler is. I need to get one from Stan and compare the two.

I see. Well if it helps with the fibration, I'd def be interested. Then again I am running a huge 2 blade prop with an 1 1/8" prop shaft...so not quite sure how much it will take out.

 

[Toolman]

What I'm trying to do is go after the biggest offenders (things in the v-drive world that aren't right) and fix them. One at a time

 

[Toolman]

would be awesome if you could make up some ss safety collars the same way...:thumbup:

S.S. collars are definitely a possibility

 

[Toolman]

Well, here are the bolts we're using until something better comes along. U can see my final balancing drill holes. I machined a shaft that goes thru coupler complete with keyways, keys, and set screws that simulates real world conditions and spin it on static balancer. I decided to leave it a little heavy so I'd have to do a final drill balance by hand so that in the future if bolts change a little, I have extra weight to play with.

 

[RiverDave]

The current couplers have the shaft bore off center about 3/32" to compensate for out of balance condition. The balancing people I talked to say when u throw the main body of something off center, it needs counterweights like a crankshaft to do it right. Stan has an old concentric coupler that someone drilled 3/16'' holes the full length of the part ( a series of 5 holes on an arc which would have taken forever) in the same area as my grooves. He says it works great.

BTW, this is not an exact science. When I get the right bolts, I will check my work for balance. Trying to avoid dynamic balancing $$$$$$$

But to answer ur question, I don't know exactly how out of balance the current coupler is. I need to get one from Stan and compare the two.

Are you balancing these by Mass in CAD? Or are you actually balancing them?

Little balancing jig I made for an RC car flywheel for a friend.

[video=youtube;sYEVh-vD2GM]https://www.youtube.com/watch?v=sYEVh-vD2GM[/video]

Balanced flywheel

[video=youtube;0UsSuHfWtgk]https://www.youtube.com/watch?v=0UsSuHfWtgk[/video]

 

[Toolman]

Both. Cad got me real close. But not quite dead on. I believe it's because I don't use actual threads in my models 'cause it hammers my video card. Any kind of a helix will bring a computer to it's knees. Also, when I finally got the bolts, they were .030 shorter than my model.

I knew I would have to do a final hand balancing to bring it in. I built a fixture to balance it.

The couplers only see 3 machines. CNC Lathe, broach, and 4th axis mill.