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Tool Time – Barrel Polishers

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london-jewellery-school-blog-Tool-Review-barrel-polisher

For the next post in our series about great workshop tools to add to your collection we are going to be talking about Barrel Polishers (also called Tumblers)!

When you first start to make silver Jewellery you will probably polish by hand using sand paper of varying grits to get a nice smooth finish on your piece, and a liquid metal polish such as Glanol which comes as part of our fab new polishing and finishing kit.  This process can take quite a while to do by hand, and we have no doubt that soon you will be looking for a tool to speed up your polishing and finishing time.

There are a few options in terms of polishing machines you will want to consider such as a pendant motor, micromotor or even a bench polisher, but one of the most common polishing tools that are purchased first for a new workshop is the Barrel Polisher (also known as a Tumble Polisher).  So what does it do?

A barrel polisher allows you to quickly and economically polish small quantities of Jewellery and Jewellery findings and components at the same time.  You place your Jewellery in the vaned container or ‘barrel’.  And depending on the finish you want you either add steel shot and a teaspoon of polishing compound such as BarrelBrite and just enough water to cover everything and have approximately 1cm of water above the steel shot; or cutting powder, ceramic cones and water for a matt finish.

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Shot and Barrelbrite in the barrel.

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Jewellery ready for polishing, plus enough water to cover the shot added.

You seal up the barrel so it is watertight as per the manufacturer’s instructions and place onto the rotating motor.  Typically the motor just plugs in at the wall and starts as soon as you turn on the switch at the socket.

Make sure that your barrel is not wet at all or it might not turn properly and don’t touch your barrel with wet hands when it is on.

Ideally tumble your pieces for as long as possible – I always aim to tumble my pieces for at least four hours but I often check them every hour to see how they are looking.  Please note it is best to open and drain your tumbler over a large plastic bowl or container so that you don’t lose all your shot and have to spend ages picking it up.

I normally tend to tumble either smaller pieces or larger pieces together as mixing them can cause damage to the smaller pieces.

Pros:

The biggest benefit of barrel polishing your pieces is that you can polish multiple pieces at once – you can have your work polishing in the background whilst you do other things so it is a real time saver!

One of the key benefits of tumbling your Jewellery and findings is that the steel shot gently work hardens the outer layer your pieces which is essential for things like ear pins and ear wires.  I normally still gently hammer or twist my findings in addition to tumbling so that I am 100% sure they are hard and robust but the tumbler hardens them a little too and makes them lovely and shiny.

Cons:

It is important that you bear in mind that for very smooth surfaces the little pins in the steel shot mix can occasionally leave little dents in your pieces.  For this reason you may prefer to remove the pins from the shot if you are polishing pieces with no texture, or chose another means of polishing your piece.

For intricate pieces you might find that the pins don’t quite get into all the nooks and crannies so you may need to either finish your pieces by hand, or look at investing in a pendant or micro motor.

If you intend to use different compounds to enable to you finish your pieces to a matt or polished finish I recommend having different barrels for different compounds so that you don’t get any contamination.  I have two barrels – one for getting a matt finish and one for getting a polished finish.

Barrel polishing won’t unfortunately remove any scratches so you still need to spend the time removing scratches beforehand using your files and your emery papers.

I wouldn’t recommend tumbling pieces with stones set or beads already set as there is a risk that the steel could crack the stones.

Finally please use stainless steel shot!  It is a bit more expensive to buy (do shop around) but it more rust resistant and so will save you money in the longer term!

Which one to buy?

There are a number of tumblers on the market that vary quite substantially in price.  The best piece of advice I can give you is to buy the best tool you can afford at the time.

I initially bought the Metal Barreling Starter Kit With 3lb Machine from Cookson Gold with the plastic barrel and lid.  However I found it was prone to leaking and you do have to heat the lid with warm water before use otherwise it was impossible to get the lid on without cracking it.  You can get replacement barrels, lids and belts for this machine.

Basic Barrel Polisher-CooksonGold

Metal Barreling Starter Kit With 3lb Machine from Cookson Gold

After about a year I upgraded my tumbler to one of the rubber ones.  I upgraded to the Cookson Gold Gold Pro one and I love it!   It comes in 2lb or 3lb sizes and you can buy the tumbler on its own or as part of a starter kit.  I have since purchased a second barrel to use with cutting powder and ceramic cones so that it is more versatile.  It is a great option for a good workhorse at a reasonable price.  FYI – I don’t tend to keep my shot and water in the rubber barrel – I transfer it between uses into a large jam jar.

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Gold Pro Barrel Polisher by Cookson Gold

If you will be using your tumbler round the clock however, you may want to consider one of the semi-professional machines from Evans or Lortone or a Rotabarrel for the serious workshop!

Barrel Polisher

Author: Karen Young

 London Jewellery School Blog_Karen Young Bio