Building my first crossbow. Just wondering: is aluminum bar ok for my rolling nut? T
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3 posters
opinions please
rickraedeke- Fresh Blood
Doesn't mean
I'm new to crossbows - Posts : 26
Join date : 2017-07-04
Location : Smith River, Cailf
- Post n°1
opinions please
Onager Lovac- Workshop Savvy
Did you see my tool collection?
- Posts : 120
Join date : 2015-06-18
Age : 32
- Post n°2
Re: opinions please
Just about anything is good enough for a rolling nut if reinforced with a bit of steel, but if i we're using aluminum by itself i wouldn't use a prod that pulls more than 90 pounds.
Geezer- Master Crossbowyer
- Posts : 1194
Join date : 2010-01-12
Age : 75
Location : Austin, Texas, USA
- Post n°3
Re: opinions please
I have used aluminum bar stock for roller nuts in the past. In fact, it's very strong, if you fit a bit of steel allthread rod for a sear. So much for the good news.
The bad news is: aluminum is a bitch to cut... very sticky and surprisingly hard to cut and harder to file. When you get your aluminum nut made, and a steel sear plug inserted in the bottom, you'll discover the stuff oxidizes on the outer surface. This oxide wears off on the inside of the nut-socket and also gets spread all over the top (table) of the stock... The first few shots you make after it's been sitting a while, will hang up a bit. After that, it should shoot okay. If you can live with the grey oxide all over the top of your stock, you should be good.
Personally I recommend Delrin rod for a roller-nut, or if you have access to a decent lathe, get a piece of moose-horn (base of the horn, where it comes off the head) and turn that down for a nut. It's what the ancients used. Geezer.
The bad news is: aluminum is a bitch to cut... very sticky and surprisingly hard to cut and harder to file. When you get your aluminum nut made, and a steel sear plug inserted in the bottom, you'll discover the stuff oxidizes on the outer surface. This oxide wears off on the inside of the nut-socket and also gets spread all over the top (table) of the stock... The first few shots you make after it's been sitting a while, will hang up a bit. After that, it should shoot okay. If you can live with the grey oxide all over the top of your stock, you should be good.
Personally I recommend Delrin rod for a roller-nut, or if you have access to a decent lathe, get a piece of moose-horn (base of the horn, where it comes off the head) and turn that down for a nut. It's what the ancients used. Geezer.