Re: [CAD_CAM_EDM_DRO] 20 degree gear racks

Tyson,

Let me jump in here with a different suggestion that may help someone.

John Johnson at Ez-Router will sell their very nice belt reduction drives
and 6' of track. They use 14.5 deg rack and pinion gears. After talking with
John, he has me convinced that 14.5 deg is the way to go.

Their rack is not drilled, but I have been assured that only the outside is
hardened and once you get through the surface the drilling gets easer.

I have a project coming up soon and I will be taking John up on his offer.

Ez-Router also uses Bishop Wisecarver wheels.

Robert Colin Campbell
Bob Campbell Designs
www.Campbelldesigns.com
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: "Tyson S." <timbercutter@...>
To: "DIY CNC" <DIY-CNC@yahoogroups.com>; "CAD CAM EDM DRO"
<CAD_CAM_EDM_DRO@yahoogroups.com>; "Job Shop Home Shop"
<jobshophomeshop@yahoogroups.com>; "Home Machinist"
<home_machinist@yahoogroups.com>; "Router Plasma CNC"
<RPCUserGroup@yahoogroups.com>; "CNC Routers" <CNCrouters@yahoogroups.com>
Sent: Wednesday, November 08, 2006 5:44 PM
Subject: [CAD_CAM_EDM_DRO] 20 degree gear racks


>I found a place to buy the BWC rails, now I am looking for a place to
> get 49" long 20 degree PA gear racks somewhere around 20 pitch that
> have about a 3/8" wide face or better. Mcmaster only has 14.5 degree PA
> racks that are pre-drilled with mounting holes. All of the 20 degree
> stuff has no holes. And one company said the non hardened racks that
> you can drill yourself then need to be hardened to get any life out of
> them after you drill. I don't mind drilling, but I don't want to have
> to harden the stuff. (Don't know how)
>
> Tyson, Oregon
>
>
>
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