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  #61  
Old Thu 30 June 2011, 21:42
picturesnow@charter.net
Just call me: Trell
 
Hickory
United States of America
pinions

LazyMan
If you get the 200011 racks..... Where would get the pinions gears from and which one would you get. What pinion would be good for that rack.
Thanks for the help
Trell
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  #62  
Old Thu 30 June 2011, 22:34
KenC
Just call me: Ken
 
Klang
Malaysia
Probably the same supplier.
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  #63  
Old Fri 01 July 2011, 19:31
timberlinemd
Just call me: Steve #66
 
Arizona
United States of America
McMaster-Carr Part 5172T14 20 Pitch, 20 PA, 1/2" Bore, 30 teeth
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  #64  
Old Fri 01 July 2011, 21:44
picturesnow@charter.net
Just call me: Trell
 
Hickory
United States of America
Thanks
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  #65  
Old Mon 04 July 2011, 13:32
timberlinemd
Just call me: Steve #66
 
Arizona
United States of America
Your welcome. One note, if your going to be using a 3.6 ratio then get a 20 tooth. I'm using the 7.2 ratio.
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  #66  
Old Mon 04 July 2011, 20:58
picturesnow@charter.net
Just call me: Trell
 
Hickory
United States of America
I am going to be using #23-305-DS8A 425oz-in bipolar rating, 305oz-unipolar rating, 4.2v, 3A, 200 S/R, 3.2mH, Size #23, Dual Shaft, 8 wire stepper motors. Would I want to go with the 3.6 ratio or the 7.2? I am trying to get speed with cutting power. What do you think.
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  #67  
Old Mon 04 July 2011, 22:54
KenC
Just call me: Ken
 
Klang
Malaysia
I don't recall anyone using #23 motor for MM.
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  #68  
Old Tue 05 July 2011, 06:19
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
Frame Size 23 is not recommend for a MM. Nema 34 with 12.7mm/1/2" shaft is preferred.
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  #69  
Old Tue 02 August 2011, 12:20
servant74
Just call me: Jack
 
Nashville (Tennessee)
United States of America
Just got a quote from std steel on
P/N 200011 IS $38.00 EA. (73" or so, I requested info on 5 'sticks' and an extra 15.3" piece, but they did not respond in detail.)
S&H $50.00 UPS

This is USA shipping. I requested a quote for TN delivery. And as always, non-credit/paypal payment required before shipping
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  #70  
Old Mon 06 February 2012, 20:56
WTI
Just call me: James
 
Detroit (Michigan)
United States of America
Current best price on the pinions ($18) is at

http://www.ebatmus.com/catalog/search.html?query=ya30

http://www.amazon.com/Boston-Gear-0-.../dp/B004NYAHMU
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  #71  
Old Sun 25 August 2013, 17:34
Mrayhursh
Just call me: Hurshy
 
Riverview, Florida
United States of America
Mounting Gear Rack

When looking at the gear rack in the Mechmate plans. It looks like it is held in place by 2 screws and 3M tape. Is this correct? Is there any problem with drilling and tapping the gear rack from the back say every 12". If I did this I would have to use V-rail. Or am I just over doing it.
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  #72  
Old Mon 26 August 2013, 02:00
Alan_c
Just call me: Alan (#11)
 
Grabouw (Western Cape)
South Africa
Send a message via Skype™ to Alan_c
Over doing it!, in fact you dont even need the bolts at the ends, the VHB tape WORKS! (and besides do you really want to drill and tap all those holes? )
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  #73  
Old Mon 26 August 2013, 05:34
KenC
Just call me: Ken
 
Klang
Malaysia
I would stop anyone from killing their free time drilling & tapping.
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  #74  
Old Mon 26 August 2013, 06:58
darren salyer
Just call me: Darren #101
 
Wentzville mo
United States of America
I only have tape on mine.
I bought it at Autozone.
3M emblem tape.
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  #75  
Old Wed 07 January 2015, 18:50
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
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Rack & pinion…survey !

Hi all !
As I recently posted on my thread, I’m in need to change my rack after all these years ! Back then, I as many others, I bought racks from Standard Steel Specialty.
This time, I want to try another one !!,,,
Any recommendation on some, maybe better ones then SSS ?
I'm considering Moore Gear for a combo of harden racks & gears !

As anyone tried form any another source than SSS ??

Thks in advance
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  #76  
Old Thu 08 January 2015, 10:31
Fox
Just call me: Fox
 
Amsterdam
Netherlands
try helical rack and pinions and let us know
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  #77  
Old Sat 10 January 2015, 04:24
javeria
Just call me: Irfan #33
 
Bangalore
India
Helical Racks from YYC taiwan
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  #78  
Old Sat 10 January 2015, 12:40
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
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Helical Racks....Yes on improvement in smoothness of motion, accuracy and noise reduction, can't debate that !!..
But also, like anything, there's 2 side to a coin....helical rack creates an axial load due to the helix angle of the teeth....
Load/drag....no so desired for our application ( I'm no rack engineer, but.... i'm wiling to learn )

My quest is to find some other source for a more "durable" material/product then reg cold roll steel like the one from SSS

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  #79  
Old Fri 06 February 2015, 04:28
javeria
Just call me: Irfan #33
 
Bangalore
India
Folks, can anyone direct me to an autocad version of the a 1:1 drawing for the 1.5 module rack. I need an exact version so that I can laser cut it on a 6mm mildsteel sheet,
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  #80  
Old Fri 06 February 2015, 05:05
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Use this



. . . . and draw it yourself. angle = pressure angle. No curvature on side of tooth.
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  #81  
Old Sat 07 February 2015, 05:48
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
If you are using 6mm mild sheet to cut the profile, do you intend to "stack or laminate" the thin layers to get your complete width rack of 12mm? Or something special?
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  #82  
Old Mon 09 February 2015, 00:52
javeria
Just call me: Irfan #33
 
Bangalore
India
No Sean I don't, I will not laminate, I would do a case hardening (0.5mm) on this and use it as it is.
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  #83  
Old Mon 09 February 2015, 03:39
Gerald D
Just call me: Gerald (retired)
 
Cape Town
South Africa
Hope you realise it won't be straight?

http://www.thefabricator.com/article...g-on-the-level

Last edited by Gerald D; Mon 09 February 2015 at 03:42..
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  #84  
Old Sat 14 February 2015, 03:19
javeria
Just call me: Irfan #33
 
Bangalore
India
That's understood - G, even on case hardening it would distort, its the way it will be clamped in place to iron it out the secret of using it - will share once done.
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  #85  
Old Mon 02 March 2015, 14:55
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
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Now for gear...??

Back to post #75, I was asking for some alternative rack source then SSS !
Finally, I'm getting SSS one's !!

BUT, as for gears, what brand you guys are using ??
I've got some from Boston and another one (initially from McMaster, but can't remember the brand).
Out of curiosity....and...say...a "scientific" survey....what other brands is being use here...WITH good to great results (accuracy ans wear) ?

Thanks in advance
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  #86  
Old Sat 07 March 2015, 14:42
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
browning.
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  #87  
Old Sun 08 March 2015, 09:04
Robert M
Just call me: Robert
 
Lac-Brome, Qc
Canada
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Tks...I have forgot about them !
Was this one used on one of yours ?
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  #88  
Old Sun 08 March 2015, 19:04
smreish
Just call me: Sean - #5, 28, 58 and others
 
Orlando, Florida
United States of America
yes.....Browning Gear
20T and 35T with 7.2 : 1 gear box

20T on the Z
35T on the x and y
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