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Can someone help me identify this type of bolt?

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matt_i

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I would call it a "machined part".

Sorry that's really not much help but in my opinion its not common enough to commandeer a special name for it.
 
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msacco

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matt_i said:
I would call it a "machined part".

Sorry that's really not much help but in my opinion its not common enough to commandeer a special name for it.
Click to expand...

Yeah I think its used usually in motors and stuff like that, the thing is, I want to find something to connect to it, so I'll be able to spin it clockwise and counterclockwise easily, I thought of finding some sort of screw connector that you can tight with a screw(something like this https://www.bptfittings.com/store/m...b33525d08d6e5fb8d27136e95/2/4/241-DCSLP_1.jpg), and then connect it to a handle or something like that, any ideas?
 
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scissorman

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You need to start by measuring the diameter of the shaft across the round portion. Once you know the diameter you should be able to do a search for a D shaft knob or coupler of that diameter.
 
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msacco

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Old Man Roger said:
I googled ''Push on knob D shaft''

https://www.google.com/url?sa=t&rct...nobs-16.html&usg=AOvVaw1GJo1pvStaZ_FqoWVoQ_he
Click to expand...

scissorman said:
You need to start by measuring the diameter of the shaft across the round portion. Once you know the diameter you should be able to do a search for a D shaft knob or coupler of that diameter.
Click to expand...

That was extremely helpful! Hopefully I will be able to make what I want, but you gave me a really good starting point now.
Im trying to make something similar to this: https://agenaastro.com/agena-flexible-slow-motion-cable-with-rosette-handle-9-5.html
Do you guys have any suggestions for me on what would be the best way to make something like that?
 
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Old Man Roger

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Old Man Roger

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msacco said:
Yeah the thing is, its not really cheap shipping to my country, so Im not sure its worth buying when I can kinda make something similar for 1/4 the price.
Click to expand...
AH OK! Well I guess that depends on what tools you have access to. If you have a lathe and a drill press, it would be pretty easy. If not, it's gonna take some elbow grease..lol
 
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msacco

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Old Man Roger said:
AH OK! Well I guess that depends on what tools you have access to. If you have a lathe and a drill press, it would be pretty easy. If not, it's gonna take some elbow grease..lol
Click to expand...

Well I don't have a lathe or a drill press, but I think I have enough tool to use my drill as a press drill, I think the only thing I need is something that sort of fits the D shape, then just drill a hole for a screw to hold it tight in place, connect a strong flexible cable on the other side, and then just connect some sort of handle at the end. My only real problem is finding a connection for the D shape, is I'll prefer buying something ready with a hole for a screw already made, and then I'll only need to connect all the parts. I've seen some screws that match what I want, but can't really find anything I can order from ebay/aliexpress.
 
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Old Man Roger

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msacco said:
Well I don't have a lathe or a drill press, but I think I have enough tool to use my drill as a press drill, I think the only thing I need is something that sort of fits the D shape, then just drill a hole for a screw to hold it tight in place, connect a strong flexible cable on the other side, and then just connect some sort of handle at the end. My only real problem is finding a connection for the D shape, is I'll prefer buying something ready with a hole for a screw already made, and then I'll only need to connect all the parts. I've seen some screws that match what I want, but can't really find anything I can order from ebay/aliexpress.
Click to expand...
Google ''shaft collar with set screw''
 
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msacco

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PMD1966 said:
Measure the round part of the shaft. Find a knob with a set screw to tighten down on the flat part of the shaft.
Click to expand...

Yeah thats what I wanted to do, but I just can't find a set screw, I need to get it from ebay/aliexpress/drive somewhere else as I live in a very small city and there's nothing useful in the tools shop here. Any more accurate kewords I can search for? I searched in any way I can really(if you find something, make sure its a worldwide shipping, cause not every seller ships to my country).
 
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msacco

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Old Man Roger said:
Google ''shaft collar with set screw''
Click to expand...

Oh nice! I also just bumped on "rigid coupling", which one would you think be better? the rigid coupling seems to be longer, so I can connect a cable at the other end, which seems to fit more what I need like this: https://www.aliexpress.com/item/2-5mm-Motor-Copper-Shaft-Coupling-Coupler-Connector-Sleeve-Adapter-US/32857462555.html?
What do you think?
I measured the D shape bolt for 1.5cm~ so it means I need a 15mm connector?
 
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ducksface

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You need anything that will slip over it. Wood, plastic, baby rattle handle, tubing, a drilled bolt....
Length diameter and style are as you find it.
Coat your existing part with Vaseline or similar.
Fill whatever slips over it with silicone or jb weld or your choice of hardening or semi hardening material.
Slip the filled piece over that shaft.
Wipe off excess.
Let dry.

Done.

You're all making this way too hard.
 
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msacco

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ducksface said:
You need anything that will slip over it. Wood, plastic, baby rattle handle, tubing, a drilled bolt....
Length diameter and style are as you find it.
Coat your existing part with Vaseline or similar.
Fill whatever slips over it with silicone or jb weld or your choice of hardening or semi hardening material.
Slip the filled piece over that shaft.
Wipe off excess.
Let dry.

Done.

You're all making this way too hard.
Click to expand...

I've actually done something similar using "quick steel" if you know what that is, it works, but I need to connect a cable to it and a screw to hold it in place, so I think that wouldn't work as good in this situation.
 
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msacco

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ducksface said:
Use the cable itself for the jamb on the flat side.
Sooooo many ways to fix this in a minute.

You're not thinking it all through.
Whatever you attach to the switch/rheostat can be made to fit that cable or a bike pedal or whatever you want.
It's a hole and a self tapping screw. Almost no tools needed.

I had a speedometer cable that allowed me to adjust the twist the distributor timing on a very nasty choke-less Dana Camaro.
It took an hour to engineer and about the same to build.
It's identical to what you want.
Click to expand...

That is correct, with that said, I still don't really have all the parts I need, so I need to find a good cable first, and then make it, but that was a very good tip, thanks :)
 
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dogdog

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Not sure what you are using that for.... but you should be able to fab it yourself no ?

15mm is pretty big size hole about 5/8 or a little over 1/2", it should be easy for you to make something ... just find a counter sunk screw ? not sure what hardware store you have, even here in the US we have HD / Lowes that I can find those screws... pretty sure you can find a tube that is 15mm ID for your needs....


I have made something similar D shape for gas range knobs..... but I didn't needed a set screw. just needed to replace the D tube and "quick steel" it in the knob that is broken....

Took a piece of steel tube/copper tube... slit the tube then form it to the D shape shaft...

as for your situation 3/8 black pipe have a hole diameter of a tat bit less than 1/2" = 12.7mm I am pretty sure it is not hard for your to enlarge it to 15mm.... and pretty sure you can find a piece of plastic to shape it the the fill that missing D to make it a circle... or drill and tap a small hole for your counter sunk screws.... all this you can do with hand tools and minimum machinery.

just saying... buy it or make it...
 
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VocaTexas

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Guys, that's not a switch, it's a worm-gear shaft on a telescope mount. You rotate the shaft to move the telescope in either right ascension or declination.

MSACCO, it would help if you put your location in your profile. Knowing where you are located on the planet might help with narrowing down your choices on how to go about building what you want.

If it were me, and I didn't have access to a lathe or drill press, I would take a small length of metal tubing just large enough to slip over the shaft and drill and tap the side for a set screw to tighten up on the flat of the shaft. That's the way the knobs in your link work.
 
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msacco

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VocaTexas said:
Guys, that's not a switch, it's a worm-gear shaft on a telescope mount. You rotate the shaft to move the telescope in either right ascension or declination.

MSACCO, it would help if you put your location in your profile. Knowing where you are located on the planet might help with narrowing down your choices on how to go about building what you want.

If it were me, and I didn't have access to a lathe or drill press, I would take a small length of metal tubing just large enough to slip over the shaft and drill and tap the side for a set screw to tighten up on the flat of the shaft. That's the way the knobs in your link work.
Click to expand...

Yep, that's also what Im planning to do :]
 
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toplessHO

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some of the plastic knobs that fit that have an insert made of spring steel
you may be able to buy that insert and place it into a knob that has a round hole
 
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msacco

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toplessHO said:
some of the plastic knobs that fit that have an insert made of spring steel
you may be able to buy that insert and place it into a knob that has a round hole
Click to expand...

Maybe but I'll need it to be with a flexibe cable.
 
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