Reamer Size for 1/8" pivot

[AVigil]

Using 416 ss pin for a pivot what size straight reamer size would be recommended for the blade pivot hole?

 

[Stacy E. Apelt - Bladesmith]

It depends on the exact size of the pin stock. What are it's specs?

If the pins are exactly .1250, then a reamer of around .1255 to .1258 would be good.

You will see charts recomending anywhere from .00053" to .001" oversize for the reamer. I find somewhere around .0005 is the minimum that is still smooth and easily assembled. .001" is a bit sloppy.

 

[HSC ///]

When I used 1/8” Pivot barrels I used a .1255 reamer

 

[AVigil]

Thanks,

My pin stock is precision ground 416 ss .1250"

I will find a .1255 reamer.

 

[HSC ///]

you probably already know that reamers are run at slower spindle speeds than the same size drill, half speed is a good place to start, or even less

 

[MotorCityMike]

My 2 cents

I ream undersize for pivots then use a barrel lap and lapping compound to open the hole to the exact diameter I want.

This way I can sneak up on the size and get the precise fit I want.

 

[Stacy E. Apelt - Bladesmith]

Also, make your tools last ... get a carbide reamer. A HSS reamer is good for two or three holes and then it will be out of spec.

 

[Steve Beckwith]

I am looking for a vendor for a reamer. Can anyone help me out?

 

[Busto]

I am looking for a vendor for a reamer. Can anyone help me out?

MSC Direct will have all the sizes of reamers you could ever need. Carbide is pricey but worth the durability over time.

 

[Stacy E. Apelt - Bladesmith]

I have had good luck with reasonably price carbide drills and reamers from Carbide Depot:
http://www.carbidedepot.com/REAMERS-SOLID-CARBIDE-C4911.aspx?s=Name ASC&ps=30&p=6

 

[Steve Beckwith]

Thanks both for the replies. I have to say that Carbide Depot prices are more to my liking.