Copyright 2011. figNoggle Designs.

7x10, 7x12, 7x14 Mini-Lathe Information

Website Links
Post a link to your website or view other hobby and machine and metalworking websites for free.

Rent Mill & Lathe DVDs at Smartflix | Great aluminum & steel prices at OnlineMetals


These couplings are used to transmit power between shafts and allow for misalignment. They also offer zero-backlash.

Here's an anti-backlash helical flex coupling in two varieties. one is a simple setscrew type that uses a setscrew to screw onto the flat spot of the motor shaft.

The other variety is a clamp-on type that grabs the circumference of the shaft.

There are also oldham-type couplings which are three-parts: two shaft ends and a middle section that contains an acetal x-shaped coupling unit or a more flexible nylon (or other material) unit. (not shown)

In comparison, here's one of the smaller 1/4" shaft diameter flex couplings you see above with a 1/2" shaft diameter flex coupler. Notice the sizable difference!


One of the tricks when using the clamp style of coupling with a smaller shaft diameter journal is to use a home-made shaft adapter which is essentially a piece of metal stock (in this case we're going from a 1/2" diameter to 5/16" diameter) drilled to the journal diameter, then using a bandsaw, slotting saw or similar means, cut through one side along its length and into the inner portion half-way through the stock so that it's flexible:


Another version of an anti-backlash flex coupling is shown below. It consists of two plates with a metal spring washer sandwiched inbetween. This model is a 1/4" diameter shafted one but has a larger outer diameter than the ones shown above.



Looking for mini-mill help and how-tos? How about lathe help and how-tos?

We're prototyping a benchtop CNC vertical mill using the DigiSpeed-XL interface card for Mach, Dart Controls and KB Electronics KBIC/KBMM 90VDC motor controllers, 1.5HP treadmill motor from Surplus Center and a R8-spindle head from the X2 mini-mill - not to mention Gecko servo drives and an entirely closed-loop system. Come take a look!

CNC 8x12 Lathe
Check out our newest developments like the CNC/DRO 8x12/8x14 lathe using Gecko drives, break-out board, NEMA 34 step motors, DRO and more!

Sieg X3 and Super X3 Grizzly G0463 Info
T-Mobile MDA / Cingular 8125 / HTC Wizard Hacks, Tweaks, Tips, Tricks and More!

Metal Working FAQ.NET
Your source for metalworking and machining, tips, tricks, and more. Over 50 content wiki sites!