Cape Watch
Newsletter March 2016
Tumblers
Which style, media & polish?

We will be at Hobby-X Jo'burg
3 - 6 March 2016
(3 March TRADE Only)
The Dome ,Northgate, Johannesburg

We will be open on:
Saturday 27th Feb 2016
Saturday 30th April 2016
Saturday 28th May 2016
09h00 - 12h30
Hours 9h00 - 12h30
See homepage for further dates.

A tumbler is a great tool to own for any jeweller or craftsman- beginner to professional. The uses for a tumbler are endless from cleaning empty bullet shells, to polishing stones, jewellery, dental laboratory field, engineered spare parts, cleaning rust & castings. Different brands have different looking motors that work in different ways. Remember to use the right barrel with the right motor & media and pair it with the right polishing compound for the best result.

The main benefit of using a tumbler is the amount of time you will save compared to polishing by hand. As you can make a batch of jewellery, tumble polish & get on with something else. It will also get into nooks & crannies that polishing mops won’t be able to reach quickly & easily.

Generally magnetic tumblers are quicker than rotary tumblers , they use very fine specialised pins. These get into very hard to reach spots without causing too much damage to your piece. This uses a constant speed in one direction only.

Rotary tumblers are more abrasive take longer & need more heavy duty steel media to create the desired burnish, rotary tumblers generally have 3 directional settings, various speeds & a timer. Flat plate & very fine basket wire work is not always ideal for rotary tumbling. A mix of 3 different shot is ideal & must be used with the polishing powder. You do get various other wet or dry barrels for rotary where your drum can be changed from ceramic, walnut or porcelain shot to get different stages of finishing.

Lastly you get vibrating tumblers where similar media's are used to the rotary tumbler & also give the similar finish, these are generally very large drums.

This Month's Specials

Magnetic Tumbler

Price R6260.00

Product Code: P0088

View

Steel pins are driven at high speed by powerful rotating magnets at the base of the finishing bowl. Most finishing operations are completed in under 30 minutes at a fixed speed. Just place your jewellery, the steel pins, water with a special burnishing compound (See below C0114) Designed for polishing intricate details, tiny crevices, and multiple settings, but not flat surfaces. Capacity 600g of media & jewellery

Magnetic Media Pins

Price R226.00

Product Code: M0152

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These tiny stainless steel pins are perfect for reaching into the tightest areas. Available in two diameters, 0.30mm & 0.5mm
Both are 5 mm long. Sold in 1/2 lb

Magnetic finishing solution

Price R370.50

Product Code: C0114

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1 LITRE concentrate used in the magnetic tumbler as an aid to burnish metal to a shine.

Rotary Tumbler 3kg

Price R1140.00

Product Code: P0094

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Total Capacity:3kg
(media, water, compound & jewellery)
Handle small runs & touch-ups. The clear barrel allows you to monitor your piece & an easy-to-use lid gives you quick access to contents. Used with steel shot/media (M0162-M0180) & barrelling powder compound ( see P0124) Timer, Direction & speed controllable.

Steel tumbling media

Price R188.00

Product Code: M0162- M0180

View Category

M0166 - Orbit satellite 4-6mm diameter - View
M0162 - Balls 4mm diameter - View
M0167 - Balls 2mm diameter - View
M0180 - Cross Pin 1.2mm thick 7mm long
Case-hardened carbon steel shot will burnish metal to a brilliant lustre by rolling surfaces & edges. Generally a mix is used of balls, pins & orbits to fit a range of different surfaces. Sold Per 1/2lb.

Tumbling powder

Price R102.60

Product Code: P0124

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A concentrated powdered tumbling detergent only a tablespoon of powder is needed with 250ml water. Your best choice for burnishing silver, gold, brass, copper, bronze, nickel. Used with stainless steel shot/media (see M0162- M0180 in the rotary P0094 tumbler). Sold per 250 grams.

Tumbling media vibrating tumbler

Price R79.80

Product Code: A0113

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1kg abrasive for medium tumbling cleaning & matting surfaces. Gives a consistent finish. Works great with oxidized silver techniques. Rinse and store dry when not in use.

TIPS & TRICKS:

You need to remove any deep scratches prior to tumbling using files and wet and dry paper. The tumbler will only remove fine scratches, tarnishing & polish your work. A last final high buff with your polishing motor is required to get extra shine.

Although the stainless-steel shot is 100% rust-resistant steel, you shouldn’t leave it lying around wet. It should either be left immersed in the tumbler mix of water , for no longer than 2 weeks, or cleaned, rinsed and dried completely. A good tip if drying it is to empty into a sieve, rinse thoroughly & dry in bowl with a hairdryer.

If you do need to clean the tumbler you should do so with washing up liquid (make sure you rinse it out thoroughly afterwards) – however the cleaning compound is designed to help keep everything clean during polishing.

Never tumble soft stones (e.g turquoise, coral, amber, emeralds or pearls) be cautious of your setting as some delicate wire baskets and setting cannot take the strong rotary tumbling, it is always better to use the magnetic tumbler in this case. With any other stones we really recommend you experiment first as you can’t guarantee they won’t get damaged during the tumbling process.

 

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6th Floor Vunani / Wale Street Chambers , 33 Church Street , Cape Town
PO Box 65, Cape Town, 8001
Tel (021) 424 8261 | Fax: 0867 210 871 | 0861 115 137
Our Site: www.capewatch.co.za | www.jewelquip.co.za | Email: sales@capewatch.co.za

 

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