[AustinT]

Hi,

Is there any interest in 10 foot pieces of gear rack? Another forum user and myself are about to buy some from Moore gear and it will reduce the price if the quantity is greater.

My friend, is planning on having his rack drilled through the face every 12 inches. The holes will be drilled .25 inches off of the side so the pinion will have a little more than .5 inches to run on. The dimensions of the rack will be 1 inch square ,120 inches long.


My table will use the same dimensions of rack only the holes will be drilled through the side of the gear .

If there is any interest please let me know

Thanks
Dan

[ahren]

I'm planning on building a large machine soon, so I might be interested in this. I would need 3-4 pieces of 10 foot. Let me know what you've found out in terms of costing and performance on these. You can either post here, or send me an email at ahrenkj at yahoo dot com.

Thanks,

Ahren

[2muchstuff]

1 inch square (1" face width) @ 24 DP sounds kind of beefy to me. Who makes a 1" wide 24 DP pinion gear.

[mxtras]

I may be inerested, too. Please provide some details. Thanks.

Scott

[Bill Clark]

My company manufactures rack and pinions be glad to help you out let me know what you need.

[AustinT]

I had 2 pieces quoted at 357 each
4 pieces at 297 each delivered
Those who are interested where do you need the holes drilled? Through the face near the edge, or through the side.
The two orders, holes through the face , or holes through the side cannot be added together for the quote pricing. One or the other.

pinion gears can be easily made with some gear stock or custom made by Moore Gear. They are sending me some quotes on gears.


My company manufactures rack and pinions be glad to help you out let me know what you need.

Hi can you please post some prices for gear racks? I believe 20 degree 24 pitch is the most common.

Thanks

[Bill Clark]

what ever Moore Gear quotes I will give you 25% off. If you can use gear stock for the pinion it would probably be the most cost efficient. If you need costom pinion I can do that too.

[ahren]

I can make my design work either way -- whatever is cheaper. If I had to decide, I'd say through the side to keep as much of the face as possible.

Best regards,

Ahren

[2muchstuff]

McMaster-Carr has a 6' piece of 24 DP 14 1/2 degree 1/4" face undrilled gear rack for $50.83
The drilled one is $44.42 but it is only 4' long.

I have seen 4' by 8' CNC routers at wood working shows that only have 1/4" wide gears. Correct me if I'm wrong here but if you went to a larger face width then wouldn't you have to increase the presssure between the two to reduce backlash thereby creating more friction for the motor to overcome. There has to be a happy median somewhere here.

[Al_The_Man]

On the surface, I would also think that appears to be a very wide face for 24DP, 1" is usually asociated with 12 to 10DP, at least from what I have used and have seen used commercial tables.
A

[AustinT]

what ever Moore Gear quotes I will give you 25% off. If you can use gear stock for the pinion it would probably be the most cost efficient. If you need costom pinion I can do that too.

Can I please get your phone #

Do you have the capabilites to make a 10 foot rack?



[QUOTE=McMaster-Carr has a 6' piece of 24 DP 14 1/2 degree 1/4" face undrilled gear rack for $50.83
The drilled one is $44.42 but it is only 4' long.

I have seen 4' by 8' CNC routers at wood working shows that only have 1/4" wide gears. Correct me if I'm wrong here but if you went to a larger face width then wouldn't you have to increase the presssure between the two to reduce backlash thereby creating more friction for the motor to overcome. There has to be a happy median somewhere here.[/QUOTE]

The 20 degree is superior to the 14.5 because it allows a smaller pinion without undercutting of the gears.

[PlasmaGuy]

For what is worth... on my 10ft x-axis I bought a 4ft and 6ft piece. Using a belt sander you carefully remove enough material for the two adjoining sections to have equal amounts of material. I piece of the rack used for the y-axis or scrap is then used to test the fit.

I failed to mention that my rack is glued into my rack using 614 Permatex adhesive.

A one piece rack would be great but the price is a premium in my opinion.

[AustinT]

what ever Moore Gear quotes I will give you 25% off. If you can use gear stock for the pinion it would probably be the most cost efficient. If you need costom pinion I can do that too.

Still interested
Thanks

Dan

[mxtras]

Austin -

I previously expressed interest but unless these racks offer a substantially higher pitch accuracy than the shorter racks or have ground teeth, I have a lot of trouble justifying the inflated cost per foot. Having a continuous rack is not a huge priority as seams are really not a problem.

Thanks for the info and thanks for the offer.

Scott