A Guide to Sawing & Piercing

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Another choice you need to make when purchasing your frame is whether you want an adjustable or a set style. An adjustable frame allows you to change the size to accommodate damaged blades where as a set design will only take basic size blades as they are sold.

Saw frames: A jewellers saw frame is comparable in design to a little fretsaw and is made of springy steel which holds the blade in position under stress. The size of the saw is dictated by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch.

Sawing

There have been some brand-new advancements in frame style over the previous couple of years and it is now possible to acquire more advanced variations which produce the stress in the saw blade for you. Instead the tension is developed via a cam-lever system within the blade clamp, which makes it possible for a quick release and positioning of the blade with the flick of a lever.

Saw piercing is most likely to be one of the very first major jobs you attempt as a jeweller. It is the initial step in the transformation of an easy sheet of metal into something completely different and holds limitless possibilities. Although the majority of us recognize with the concept of sawing wood, numerous find metal a little unstable in the beginning, which is why we have actually created this guide. Our aim is to help you with both tools and method, which will, (in addition to some persistence and practice), start you off on the proper path to effective sawing whenever.

Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and come in a choice of grades which range from extremely coarse to very fine. Blades are characterized by the number of teeth per cm so for example the coarsest would be grade 4 which has 15 teeth per cm and the finest is grade 8/0 which has 30 teeth per cm. As a basic guideline, the thicker the metal, the coarser the blade you will need to cut it and vice versa. The table below includes all the details you will need to select the proper blade for the metal in concern:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Recommended gauge Of metal mm

Saw blade Grade 8/0
0.17
30
0.3
As much as 0.4

Saw blade Grade 6/0
0.18
32
0.4
0.35 to 0.5

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

Saw blade Grade 3/0
0.24
23.5
0.5
0.6 to 0.7

Saw blade Grade 4/0
0.22
26.5
0.5
0.5 to 0.6

Saw blade Grade 1/0
0.28
20.5
0.6
0.6 to 0.95

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

You will not require to acquire every grade of saw blade; a standard choice of coarse, medium and fine ought to be perfectly appropriate. Ensure you buy more of the medium grade (2/0 or 1/0) as these are what you will use most frequently.

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

Saw blade Grade 5/0
0.2
28
0.4
0.4 to 0.55

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

Saw blade Grade 2/0
0.26
22
0.55
0.6 to 0.8

Installing a blade into a saw:

My drills keep breaking: A blunt drill bit will break more quickly, as we intuitively apply more pressure if it does not appear to be cutting. They are likewise vulnerable to breakages if not protected properly in the chuck.

Piercing.

My saw blades keep breaking: Dont misery this is perfectly normal and practise makes ideal. However, examine the stress of your blade for slackness and make certain you are using the appropriate blade size/metal combination.

My arm is hurting: Check your seating position is appropriate and try to relax. Likewise do not be lured to require the saw, you are simply assisting it so let the blade will do the work.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is used for exclusively that function. A durable base is combined with a movable chuck mounted on a column, which is managed by a lever at the side. The base can assist in a clamp to hold work securely helping to make sure an exact outcome each time.

Rotary Hand Drill: Rotary hand drills have the motor included within the hand piece and either run of the power supply or can be charged up to use cordless. They have the very same multi-purpose performance of a pendant drill and can be used with a vast array of devices. Rotary hand drills can be utilized in combination with a drill stand to ensure vertical drilling.

Fixing:.

My saw blades keep sticking: Apply some kind of lube to reduce the sawing motion. Some jewellers use spittle, however you can likewise utilize beeswax. Just run it along the blade and continue to saw.

The drill is getting too hot: If the drill overheats you can cool it down utilizing a percentage of water or an oil based drilling coolant. Failing that, simply stop and permit the tools to cool down.

Bow drill: A bow drill is a traditional hand drill which can be used with one hand. It has a basic twisting system which is produced with a pull/push motion utilizing a wooden baton and a piece of string. It is easy to manage and is perfect for a novice.

Centre punch: A centre punch is likewise a steel marker with a sharp point similar to a scriber. It has a shallow idea and is utilized in conjunction with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automatic centre punches which do not require a hammer and rather have a push button action.

Sawing straight lines: Straight lines are best tackled with the saw slanted slightly forward using long, smooth strokes.

Repairing:.

Starting to Saw:.

Sawing curves: Curves require much shorter strokes and require an upright sawing position. You need to carefully turn the saw along the curve with each cut, taking care not to require the blade.

Piercing a gain access to hole for sawing:.

Once your design is scribed onto the metal, identify a position within the waste product to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the right drill size to correspond with the saw blade you intend to use, (please refer to chart) and insert into the chuck making certain it is gripped tightly.
Drill the hole. Start slowly ensuring the drill bit has found its position. As soon as in position increase the speed and lower with a continuous but mild pressure up until all the method through..
Now, undo your saw blade at the clamp nearest the manage and thread the blade through the hole from the top. When through, re-clamp your blade ensuring the tension is right.
Saw out your shape.
Get rid of the saw by un-clamping the blade nearest the deal with again once sawing is complete.
Submit to finish.

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are utilizing is too difficult for that specific kind of drill. Some drills are tougher than others so check their viability prior to you purchase.

Sit at your bench with your saw frame supported between your chest and the edge of the bench or the V of your bench peg. The wood deal with should face you and the blade clamps ought to be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp the end furthest away into your frame utilizing the wing-nut. (Do not be lured to tighten up with pliers as this deteriorates the screw thread).
Push carefully versus the manage with your chest which will cause the frame to flex, and tighten up the second wing-nut to secure the blade.
Launch the frame and check the tension of the blade by plucking it. You are looking for an unique ping to show the tension is correct. If you dont hear the ping simply reverse and duplicate the procedure once again up until its right. (Failure to secure your blade with the right tension will lead to it breaking as quickly as you begin to saw).

The most essential thing to keep in mind when drilling a hole is to keep your drill bit completely vertical and upright. Chucks are either totally adjustable to take all sizes of drill or interchangeable, meaning you will require to alternate to accommodate various drill bits.

Why Pierce? When you need access to a location which would otherwise be tough or impossible to reach e.g. the centre of a circle, piercing is required. By drilling a small hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, permitting you to saw from the inside out, instead of the outside in.

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a flexible shaft connected to a hand piece, which includes the chuck. It is controlled by a foot pedal and can be used with a huge variety of various attachments consisting of drill bits.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw needs to be kept in a vertical position with the blade dealing with forward, and you need to be seated so that your working location is around mid-chest height.
Position the blade on the outside of your significant line and carefully draw the blade down. Get rid of the saw and repeat a couple of times till you have a small indent to guide the blade.
Now begin to carefully move the saw up and down bearing in mind that the blade cuts on the down movement and merely re-positions on the upward. If you are having difficulty getting the blade to bite you can use some beeswax which is sold in blocks, to help ease the motion.
Saw on the outside of your marked line and try to preserve a steady and gentle action.
Once the cutting is total, reverse the clamp at the top of the saw and pull the frame down to eliminate it from the work, or just bring it back along the cutting line if that is possible.
Submit the rough edge to complete.

Conserve this for later on.

Archimedian Hand Drill: This is a small spring loaded drill, which works using a deal with at the top which is lowered and pulled back as much as turn the chuck at the pointer. This requires both hands to use successfully.

Saw frames: A jewellers saw frame is comparable in style to a small fretsaw and is made of springy steel which holds the blade in position under tension. There have actually been some brand-new advancements in frame design over the past few years and it is now possible to purchase more advanced versions which create the tension in the saw blade for you. Rather the tension is created through a cam-lever system within the blade clamp, which allows a quick release and positioning of the blade with the flick of a lever. Saw blades: Blades for a jewellers piercing saw are offered in packages of 12, or by the gross (144) and come in a selection of grades which range from really coarse to incredibly great. By drilling a small hole you provide access to the saw blade which can then be fed through and re-clamped into the frame, permitting you to saw from the within out, rather than the outdoors in.

The drill keeps walking around and wont find its position: Make sure you have marked the drilling position plainly with a tiny dent to guide the drill. Guarantee the drill is fitted properly into the chuck, it may not be directly. Above all, guarantee the drill itself is totally upright.

Defining and determining: Before starting to saw, your metal needs to be plainly significant and determined so you have a guide to work to. Lines can be scribed onto metal using a scriber or a set of dividers (which resemble a compass but with 2 points). If you desire to transfer a more intricate style onto metal, copy it onto tracing paper and cover the reverse with graphite as typical. Prior to moving to the metal surface area, rub it over lightly with Plasticine so that a sticky movie is left, which will reveal up the pencil marks developed when you re-trace. Eliminate the tracing paper and go over the pencil lines with a scriber once you have actually re-traced the design onto the metal.

Scriber: A scriber is a great marking tool with a narrow and long suggestion. It is used to scribe designs onto metal and can be utilized to mark the positions for drilling.

Drill bits: The most typical type of drill bits are twist drills which cut when turned in a clockwise direction. They are made from a range of toughened products and range in size from 0.3 mm upwards. Drills can end up being blunt remarkably rapidly so its suggested to purchase multiples of the sizes you utilize most regularly.

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