Speed Screw Question

Vern

Vern

Morethan1waytoskinacat
I keep trying to wrap my mind around this concept.
I have not seen one yet.
If the screw that comes with a Screw foot/leg that has xxTPI then the replacement foot has to have the same xxTPI then how can the speed screw get you to and from the sighter any quicker than the stock piece.

Enlighten me please.
 
is not limited

Vern said:
I keep trying to wrap my mind around this concept.
I have not seen one yet.
If the screw that comes with a Screw foot/leg that has xxTPI then the replacement foot has to have the same xxTPI then how can the speed screw get you to and from the sighter any quicker than the stock piece.

Enlighten me please.
Click to expand...

to the threads in the rest. The post of the speed screw is driven by a screw that is housed within the diameter of the base threads. Typically a acme 4/inch or there abouts
 
Vern ...

Vern said:
I keep trying to wrap my mind around this concept. I have not seen one yet. If the screw that comes with a Screw foot/leg that has xxTPI then the replacement foot has to have the same xxTPI then how can the speed screw get you to and from the sighter any quicker than the stock piece. Enlighten me please.
Click to expand...

You can purchase a speed screw here: http://www.sinclairintl.com/product/10814/Shooting-Rest-Accessories. Once you wrap your fingers around one and watch how it works ... your mind will follow. ;)
 
I know where to buy them but I wanted to know how it works before I spend the money to wrap my hand around one.
Partly just curioisity and partly spending the money.

As I understand it, the screw rides inside a sleeve that has the same TPI on the outside as the rest and a different thread on the inside.
 
Basically it is a simply concept. There is a threaded sleeve that screws into the base of the rest. on top of that threaded sleeve is a much larger threaded area,(about the size of a quarter) Looking at the picture you see a big knob that has knurling it is threaded inside and mates up with the larger sleeve. There is a long needle like screw that is attached to the big nob, (cap) and it floats inside the sleeve. When you turn the knob it moves the needle in and out of the sleeve.

They say a picture is worth a thousand words. does this help?

IMG_0126.jpg

IMG_0125.jpg

IMG_0127.jpg
 
vern

There are several designs of speed screws but the one 82boy showed is the most common. You are changing a 22 TPI screw that moves .045" in one turn, into a 8 TPI that moves .125" per turn, approximately, there-abouts.

There are also ones that work on a cam rather than a threaded screw and home-designed and made ones that can work on a combination of cams and screws.

If you have a lathe you can make your own at no cost whatsoever. If you don't count the $25,000 lathe.;)

Ray
 
Stephen

Do you have a web address for it.
I have to buy a new front rest and I have not decided on one yet.
Thought about sinclair but they are out of stock on everything.
You think they would have the good sense to carry these things during the season and not wait till after season, but who knows maybe theses type things are only ordered after season.
 
Mr D's

Vern
I've had mine so long I think I bought it from Bruno or Russ Haydon. Speed screws are fine the Sinclair one is made by somebody for them. I have 2 speed screws and a Mr. D's on my bag rests. If I had to go with one it woud be the Mr. D's. Speed screws always leave you guessing on vertical going from record to sighter.

Stephen Perry
Angeles BR
 
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Speed Screw

Speed screws are used in Group just as much. What do you call the rear leg screw on a Loh rest Ab?

Stephen Perry
Angeles BR
 
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Abintx I usually shoot group but when they have score matches I will shoot those too.
This definitely gives me some options to consider.
Now all I have to do is decide on a rest and and find one for sale.

Seems I cant find a rest when I have the money or when I have the money there is nothing in the classifieds and everyone is sold out of something I want or can afford.
I just remind myself to be patient.


Stephen what do you mean that speed screws leave you guessing?
 
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Vern

I like my Hart rest with the Dunrud and Hoehn top. Going from record to sighter and back is not positive with a speed screw so you are always guessing where your vertical setting is, not with a Dunrud.

Stephen Perry
Angeles BR
 
I personally use a Speed Screw for both group and score but have friends who are die hard group shooters who strongly advocate the use of a Sighter Cam. Although I recognize the Cam's value, I decided to stay exclusively with the speed screw once I was accustomed to it. I shot score for almost three years before shooting groups. Give'm both a try. :)
 
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