Needs Pictures: 0
Picture(s) thanks: 0
Results 1 to 9 of 9
-
31st August 2014, 07:05 PM #1SENIOR MEMBER
- Join Date
- May 2013
- Location
- Somerset Region, Qld, AU.
- Age
- 66
- Posts
- 602
Where can I buy Affordable Acme Threaded Lead Screw & Flanged Acme Threaded Nuts
Greetings,
I normally reside over in woodwork land, but as part of a new Bandsaw Fence that I'm building, I need to delve into metal work land.
I am building a new Fence for my wood bandsaw that will be used primarily for re-sawing veneers. The main feature of the Fence will be a lead screw advance mechanism which will allow me to move the fence a precise amount (e.g. 2.5 mm) in order to take off the next vener slice, as close as practical to the same thickness as the previous slices. There are commercial fences that do the job (for an example see - http://www.lagunatools.com/accessori...aw-driftmaster) but they are generally expensive, not always an easy fit (see https://www.woodworkforums.com/f27/reckon-driftmaster-bolt-laguna-suv-wrong-187170), and most of the commercial ones could do with some improvement anyway. So, seeing as I don't like spending my hard ear
So - the main components that I'm still looking for affordable supplies of are:
- Acme Threaded Rod (a lead screw) - roughly 12 mm diameter and 400mm long. Single start thread. Metric or imperial. The lead screw will be drived by hand via a hand wheel. There will only ever be very light loads on the thread & nut when moving the fence, as the fence will always be locked in place before at timber is cut, so I believe that mild steel rod would be plenty strong enough.
- Acme Threaded Flanged Nut to match the above threaded rod.
I've spent some time googling this subject over the last week, and have found a few Australian suppliers (even one with split nuts and half nuts, if I want to include those extra features). But, the prices are really high. One place I found that had plenty of different lead screw products and a wide variety of nuts, was www.smallparts.com.au. They have some carbon steel Acme threaded rod in various specifications, and these are a bit less expensive, but not really cheap enough.
Alternatively, can you cut an Acme thread using a Tap and Die, or is it a type of thread that can only be cut on a lathe ?
So, does anyone know of a supplier of affordable Acme threaded rod and nuts in Australia.
Thanks,
RoyManufacturer of the Finest Quality Off-Cuts.
-
31st August 2014 07:05 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Age
- 2010
- Posts
- Many
-
31st August 2014, 07:11 PM #2
Roy, do a search on Ebay. I found mine there and the dealer is 'CNC and cupcake world' They have 16mm x 4 x 300mm for $16 + $8 postage. I hope this helps. Damien.
I'm a dancing fool! The beat goes on and I'm so wrong!!!!
-
31st August 2014, 07:30 PM #3
ebay
may be of use
http://www.ebay.com.au/itm/12-X-3-RO...item460cb2720c
-
31st August 2014, 07:39 PM #4
As Damien said, cup cake world is the place to go.
You can buy acme/trapezoidal taps but I'm not sure about dies.
Ew1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
-
31st August 2014, 07:52 PM #5GOLD MEMBER
- Join Date
- May 2011
- Location
- Murray Bridge SA
- Posts
- 3,339
I have used old/broken jockey wheels, for things like what you are looking for, picked up for $2 or there a bouts.
Kryn
-
31st August 2014, 08:47 PM #6
Just rebuilt my drill press vice using acme thread from a car scissor jack. Cost me 30 seconds of my time while I got out of the car and grabbed it off of roadside chuckout
-
1st September 2014, 09:32 AM #7SENIOR MEMBER
- Join Date
- Aug 2008
- Location
- Charlestown NSW
- Age
- 65
- Posts
- 899
-
1st September 2014, 11:37 AM #8SENIOR MEMBER
- Join Date
- May 2013
- Location
- Somerset Region, Qld, AU.
- Age
- 66
- Posts
- 602
Good point!!! I don't think you are missing anything. I initially went for Acme thread simply because that is the type of thread used on the two commercial designs that I've examined. Now that I think about it, you're right, a good quality V thread would be quite suitable seeing that the thread won't be under heavy working loads.
I've got a length of 5/8" high tensile steel BSF threaded rod left over from a project I did a few years ago - just have to find it as it's buried somewhere in the shed.
Thanks for the input bollie7. Much appreciated.
Regards,
RoyManufacturer of the Finest Quality Off-Cuts.
-
1st September 2014, 12:26 PM #9Senior Member
- Join Date
- Oct 2008
- Location
- Cairns, Q
- Posts
- 351
Roy,
If you want to move the fence by a precise amount for each cut, you will find it much easier if you choose a leadscrew TPI divisible by 5 or 10 (if you work in decimals), or divisible by 8 if you work with fractions. The 14 TPI of 5/8" BSF is an awkward figure to work with.
For example 3/8 BSF is 20 TPI, so each full turn of the leadscrew will advance the fence by 1/20" or 0.05 inches. Alternatively, 3/4" Whitworth will advance the fence 0.10 inches per full turn. In metric, with an M10 thread two turns of the leadscrew will advance the fence 3mm, or one turn of an M14 leadscrew will advance the fence 2.0 mm.
Similarly for fractions, 1/2" BSF and 3/8" Whitworth are 16 TPI, so one full turn of the leadscrew will move the fence 1/16 of an inch.
I completely agree that an Acme thread is not necessary for this application. I have an old vyce which stripped the thread in the nut years ago. I made a new 5/8 Whitworth screw and nut which are quite satisfactory, and this is a lot heavier service than a fence adjustment screw.
Frank.
Similar Threads
-
3/8-12 acme tap
By rusel in forum METALWORK FORUMReplies: 5Last Post: 23rd March 2012, 02:39 PM -
Lead Screw Nuts
By Auskart in forum METALWORK FORUMReplies: 6Last Post: 19th December 2011, 01:13 PM -
ACME Threaded rod
By Lyle in forum METALWORK FORUMReplies: 2Last Post: 2nd June 2011, 06:06 PM -
Where to get ACME antibaclash nuts?
By pkowal in forum CNC MachinesReplies: 5Last Post: 6th June 2010, 01:24 PM