Cart

0 item(s)  £0.00

Coronavirus - Status Update
Updated 26th November
We are shipping as normal, and are fully operational in a Covid safe working environment
Please note that quarantine and lockdown arrangements in your country, including the UK, could mean that your parcel might take longer than usual to arrive.
Please accept our apologies for any delay, stay safe, and bear with us whilst we work with you through this difficult time.
Beaufort pen kits rank amongst the highest quality pen kits available worlwide
Worldwide agents for Bock fountain pen nibs. Fountain pen nibs to fit a wide range of pen kits and commercially made fountain pens
Check our boutique range of sumptuous fountain pen inks
Pen blanks, pen blanks, pen blanks. We have a huge range of pen blanks in wood and acrylic, from talented artisan makers and renowned international producers

How to make a lathe draw bar


Download a printable PDF version of this page HERE
 

 

Phil Dart
August 2020


Morse taper attachments mounted in a lathe headstock are prone to work themselves loose whilst under power if unsupported by the tailstock.  A draw bar is a method of keeping the attachment seated by clamping it in place. The draw bar screws into a female thread that’s often present on the small end of the tapered arbor of the attachment, and presses on the revolving hand wheel or bearing that’s at the opposite end of the headstock spindle to the lathe bed. Since every lathe is different, a draw bar isn’t something you can generally buy, but they are simplicity itself to make.


Firstly, identify the size of the thread which is inside the back end of the arbor of your morse taper attachment. 1MT arbors often have M6 threads and 2MT arbors often have M10 threads, but you can check with either a thread gauge or by screwing in an appropriate bolt to see if it will fit. You’ll need a metal rod which is long enough to screw inside that thread, and reach all the way through the spindle in your lathe headstock, so that it protrudes far enough out the other end in order to fit a washer and two nuts. You can either thread a steel rod yourself with an appropriate die or you can buy a rod from a hardware store which is already threaded along it’s entire length.

Offer up the MT attachment to your headstock spindle and roughly calculate the distance between the small end of the arbor and the outside edge of the hand wheel or bearing that’s at the other end of the spindle. Add about another 10cm to that to be on the safe side, and cut the rod to length.

If the rod is not already threaded at the arbor end, thread it now, securely fit the MT attachment to your lathe and screw the rod into the arbor through the hand wheel/bearing end of the spindle.

Obtain or make a washer with an inside diameter to suit the diameter of your rod, and an outside diameter large enough to more than cover the hole through the middle of your lathe hand wheel/bearing. It needs to be substantial enough and large enough to not bend or get pulled through. Place the washer over the rod and calculate how much you can trim the rod so that there’s enough left on it to fit a nut and a lock nut. Unscrew and remove the rod, then cut it to length accordingly.

Thread the rod at the nut end if not already done. Refit it to the lathe and screw it back into the arbor. Replace the washer, screw on a nut to a firm finger tightness, then fit a lock nut.

You have a draw bar.

To use, leave the nut and lock nut fixed in place - the draw bar is fitted and removed by screwing it in and out as a whole, not by removing the nuts. Don’t over-tighten it - a firm finger tightness is good enough. And don’t be tempted to use it as a knockout bar, which would be likely to damage either its own or the attachment's threads. If you need to knock out an arbor, use a proper knockout bar.
 

Cross section showing lathe drawbar configuration in relation to a morse taper arbor


 

Beaufort pen kits rank amongst the highest quality pen kits available worlwide
Worldwide agents for Bock fountain pen nibs. Fountain pen nibs to fit a wide range of pen kits and commercially made fountain pens
Check our boutique range of sumptuous fountain pen inks
Pen blanks, pen blanks, pen blanks. We have a huge range of pen blanks in wood and acrylic, from talented artisan makers and renowned international producers
Blog

Thread taps needn't be confusing. 17 Sep 2020 09:00:00 Phil - Beaufort Ink There are choices to be made when you're buying thread taps for making custom pens, or so ...

Pen boxes and pouches - reduced to clear 6 Aug 2020 08:00:00 Phil - Beaufort Ink We've got huge amounts of new stock arriving over the coming days and weeks, so we've been ...

All about IPG fountain pen nibs - they are not all what you might think 25 Jun 2020 09:00:00 Phil - Beaufort Ink From time to time I spot ill informed and sometimes frankly misleading explanations of so called ...

A great new concept in fountain pens - The Lethaby Ion is going places 8 Apr 2020 18:00:00 Phil - Beaufort Ink It’s always rewarding to work with up and coming professional pen makers, several of whom go ...

The pen assembly press has come of age 27 Mar 2020 18:00:00 Phil - Beaufort Ink We’d like to introduce you to our brand new pen assembly press - and what’s different ...

15% off premium plated Sirocco pen kits 13 Mar 2020 11:00:00 Phil - Beaufort Ink We're having a bit of a clear out. We've decided to slightly change the configuraion of ...

DiamondCast pen blanks now fully re-stocked 4 Feb 2020 10:00:00 Phil - Beaufort Ink DiamondCast pen blanks tend to fly out of our door pretty quickly. Why are they so ...

What will Brexit mean for our overseas customers? 28 Jan 2020 22:00:00 Phil - Beaufort Ink Whether you’re happy about Brexit or sad, for it or against, cheering from the rooftops or ...

Happy Christmas from Beaufort Ink 24 Dec 2019 10:00:00 Phil - Beaufort Ink A bit of downtime for us as we stop for a few days over the festive period. It's been quite a ...

My word - what talented customers we have! 18 Oct 2019 09:00:00 Phil - Beaufort Ink Take a look at Garcia-Deschacht and the amazing handmade fountain pens they produce. We’ve ...

01363 84686
Beaufort Ink
Great Wotton Cottage Studios
Colebrooke
Crediton
Devon
United Kingdom
EX17 5DL
Online - Start Chat?

Your name *

 

Cancel