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Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 1:46 PM

I require the aforementioned in 10-32, 7-16" size in different gram weights: 8, 10, 12, 14, 16, 18, and 21. What type of metal, tungsten? Can anyone point me to a couple of companies that can facilitate this?

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#1

Re: Is it possible to make a button head machine screw a certain size/gram weight?

12/30/2016 1:53 PM

I suppose you could fiddle around a lot with the size of the head....

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#2

Re: Is it possible to make a button head machine screw a certain size/gram weight?

12/30/2016 2:14 PM

Maybe drill and fill? Or include washers?

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#3

Re: Is it possible to make a button head machine screw a certain size/gram weight?

12/30/2016 2:22 PM

Go to a local machine shop.

That's so small that I doubt anyone will want to fool with it, unless you are willing to pay time and materials and it won't be cheap.

Your required weight tolerance will dive the price up even more if it is tight.

Try the site below, and good luck.

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#4

Re: Is it possible to make a button head machine screw a certain size/gram weight?

12/30/2016 2:46 PM

If you can go with washers as in James Stewart's comment (#2), lots of folks make tungsten washers. It would certainly be a lot cheaper than custom screws, especially if you only need a few (you didn't say).

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#5

Re: Is it possible to make a button head machine screw a certain size/gram weight?

12/30/2016 3:10 PM

Is there some way you can describe why you need these different mass screws?

I think you can do this by taking the screw in whatever material is acceptable (brass might be easier to modify if acceptable), then drill out the business end (the threaded end) very carefully, back-fill with lead or tungsten powder or solder, then carefully remove material to the mass screw you are looking for. Once that is done, braze the end of the screw closed, then either back-drill or grind down to correct the mass.

This seems very tedious. How about some small copper washers, as I am virtually certain you can order those on various supply points directly from the web.

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#6

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 4:37 PM

Well you would need to get several in different materials that are commonly available, then weigh them and see where you stand....It might be possible to machine a bit off the head to reduce weight....tungsten is really expensive, I know they use them in golf clubs for weighting...

http://www.tungsten-alloy.com/golf-screw.htm

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#7
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 4:55 PM

It may be possible to just vary the alloy amount in these tungsten screws to meet the weight requirements....

Typical Properties of Tungsten alloy Golf Screw

W %Density (±0.1) g/ccTensile strength MPaElongation %HardnessDensity P/T %Impact strength J/cm2
3510≥480≥2580~8 5HRB≥99.5 
4511≥500≥2583~85HRB≥99.5 
5312≥550≥2385~88HRB≥99.5 
6013≥600≥2088~92HRB≥99.6 
7014≥780≥1093~97HRB≥99.6
8015≥800≥1295~99HRB≥99.6 
8516≥830≥1299~102HRB≥99.6 
9017.1≥850≥2026~27.5HRC≥99.730
9117.3≥900≥2026~27.5HRC≥99.730
9317.6≥920≥2126~27.8HRC≥99.730
9518.1≥920≥1528~29HRC≥99.710
9618.3≥920≥1228~29HRC≥99.910
9718.5≥880≥830~31HRC≥99.98
We may design any type of W-Ni-Fe,W-Ni-Cu,W-Ni-Fe-Cu,W-Ni-Co according to the clients' requirements

http://www.tungsten-alloy.com/golf-screw.htm

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#8

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 7:44 PM

Average weight of a steel 7/16" 10-32 pan-head screw is 5.50 pounds per thousand. That comes out to about 2.49 grams per screw.

The average density of steel is around 7.60 g/cm3, the density of tungsten is 19.26 g/cm3, and their ratio is 19.25/7.60 = 2.53.

Now, assuming your screw was made of pure tungsten it would weigh 2.53 * 2.49 = 6.31 grams, or 1.69 grams short of your lowest figure of 8 grams. Further assuming you're stuck with the 7/16" length, your options are either to increase the screw-head volume or use a longer conventional screw together with suitable washers to get the weight you need.

You've said nothing of your application, but if you're trying to put a certain weight in a certain place, the screw's centre-of-mass will move depending on how and where you put this additional mass. A flat, large-diameter head will have a different CoM than a thin cylindrical one, for example. This may be important to your application or not, but without your saying more there's really little else we can tell you.

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#9
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 8:08 PM

"You've said nothing of your application"

Let's hope the OP isn't trying to alter the mass of the head of a golf club.

It's been tried and unless you hit a hundred+ golf balls a day changing weights is a waste of time. You won't know the difference.

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#10
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 8:24 PM

I'm not a golfer and so I wouldn't know, plus this was posted in Aerospace and so I reckoned the OP might be needing it to trim something, for example.

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#11
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 8:31 PM

I'm not a golfer either, but I own a lot of golf clubs, each set guaranteed to shave multiple strokes off my game or make my drives many yards longer and straighter.

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#12
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 8:59 PM

The way I see it, that's what Howitzers are for. Good thing they didn't base their assurances on watching me play. First they'd have to show me which end of the club to hold. I suck at golf. Truly.

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#13
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 9:50 PM

"OP might be needing it to trim something"

Maybe.

Where Can I Get a 6061-T6 Shaft Frequency and Torque Tested?

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#14
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 10:11 PM

There you go: golf-related.

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#17
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 11:12 PM

If only people would give sufficient information when asking such questions, it would be nice.

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#19
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 11:30 PM

Yep.

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#16
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 10:56 PM

Need some fat screws....like 3/8" steel = 30.7 lbs per thousand or maybe 5/16" #20@ 18.8 lbs per 1000

http://www.usfastener.com/screwweights.html

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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 11:23 PM

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#20
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/31/2016 11:31 AM

The 5/16" pure tungsten should be around 21 grams...so between the #12 size and the 1/4" size and varying the alloy, all your targets can be met in the 7/16" length...

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#21
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/31/2016 1:09 PM

This entire exercise is just a waste of electrons until the OP responds with meaningful responses.

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#22
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/31/2016 1:56 PM

But but we've worked it all out...it's a problem solved...well as long as he can drill and tap the larger screw size holes....

Tungsten Alloy Golf Club

"The golf club head preferably has a length ranging from 2.0 inches to 3.0 inches, more preferably from 2.25 to 2.50 inches and most preferably 2.4 inches. The club head preferably has a height ranging from 1.25 inches to 1.75 inches, more preferably from 1.35 inches to 1.50 inches and most preferably 1.42 inches.
Golf clubs are typically composed of titanium or steel, and either cast or forged. Changsha Mingguan can offer the golf club head injected with tungsten alloy which is much heavier.
Tungsten-With the specific gravity of 19.5, tungsten (W) is roughly 2.5 times heavier than steel, and a little more than 4 times heavier than titanium. This material has been known for its filament applications for a long time. But for golf clubs, it is primarily used as weight for shifting the center of gravity lower and/or deeper, and/or for the perimeter design. Also, the metal is used for golf balls either for the core or as powder for the composite layer underneath the cover.
Numerous techniques have been used for weighting golf club heads in order to gain better performance. In the club heads, weights were attached to the sole in order to lower the center of gravity. Usually we use a tungsten alloy screw in the sole of each titanium club head body to vary the weight of the golf club head to improve the performance of the club."

http://tungsten-alloy-counterweights.blogspot.com/2013/09/tungsten-alloy-golf-club.html

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#24
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Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

01/01/2017 3:45 PM

My daughter and I were on a walk last fall and I found one of these - just the club end - on the side of the road. I knew it must've contained tungsten because it was quite a bit heavier than you'd might expect, say, were it made of steel. Had to be tungsten - or depleted uranium.

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#15

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

12/30/2016 10:35 PM

Tungsten at around 19.26 grams per cubic centimeter doesn't even make your 8 gram low end weight. Plutonium at 19.84 edges it up a little if you're prepared to lead-shield your golf bag, but I suspect kryptonite is your friend here:

http://uncyclopedia.wikia.com/wiki/Kryptonite

If all else fails, you could make the screws from unobtainium, but it's very hard to come by:

https://en.wikipedia.org/wiki/Unobtainium

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#23

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

01/01/2017 6:33 AM

Take a standard 1" long 7/16" button head screw and cut it down in length to weight 8g (approx 3/4"). Make a set of 6 washers from 3mm sheet. All will have an I.D. of 7/16" but the O.D.s will vary to give washer weights of 2g, 4g, 6g, 8g, 10g, 13g. Or without machining the screw choose your preferred length, weigh it and make the washers from thicker plate compensating the O.D.s for how far your chosen screw is below 8g. You will need an extra washer to cover the 8g option. Laser cut the washers for precision and minimum cost if there is only a small quantity, or stamp them out if large numbers are needed.

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#25

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

01/01/2017 5:05 PM

We fabricate welding electrodes from Elkonite (a fairly high density mixture of copper and tungsten). It machines well with high speed steel tools or carbide. You could adjust the weight by varying the thickness of the button-head.

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#26

Re: Is it Possible to Make a Button Head Machine Screw a Certain Size/Gram Weight?

05/19/2019 9:39 PM

Hats-off to the guys and gals that responded to my query. Had a few laughs and guesses-some right on the money. Yes, it is for a patent pending precise, adjustable weighting sys along the golf shaft. Two protos are posted on my LinkedIn profile.

There was invaluable info/data gleaned that I plugged-in to my thinking. I had et al screws manufactured overseas (no US bites on RFQ) in tungsten @ 3.8g. The need for additional weight might lead me to using a set screw. And which size.

The 6061-T6 shaft is 24"x 5/8" (.625) hollow core, having the last 2" taper to a .370 hosel tip @ 200g. 12 screws @ 1.475 centers, 4.375 to 1st hole from grip end. USGA bending/twisting Rules require a variation of < 3CPM measured in 6 planes @ 30 degrees increments.

I'm off to sizing a set screw. If ya'll want to dig in... Thx again from Paradigm Golf Shafts.

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