A Guide to Sawing & Piercing

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There have been some brand-new developments in frame design over the previous few years and it is now possible to purchase more advanced variations which develop the stress in the saw blade for you. Rather the tension is developed by means of a cam-lever mechanism within the blade clamp, which allows a fast release and positioning of the blade with the flick of a lever.

When purchasing your frame is whether you desire an adjustable or a fixed style, another decision you require to make. An adjustable frame enables you to change the size to accommodate broken blades where as a fixed style will only take standard size blades as they are sold.

Saw piercing is likely to be one of the very first major jobs you try as a jeweller. It is the primary step in the improvement of an easy sheet of metal into something completely different and holds endless possibilities. Although most of us recognize with the principle of sawing wood, lots of discover metal a little temperamental initially, which is why we have actually put together this guide. Our goal is to help you with both tools and technique, which will, (in addition to some patience and practice), begin you off on the proper course to successful sawing whenever.

Sawing

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 tension. Blades are kept in place by wing-nut clamps at either end of the saw which are tightened by hand. The size of the saw is determined by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch. A 3 inch frame is a good basic function size for little scale tasks, however the choice is down to personal choice.

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and be available in a choice of grades which vary from really coarse to exceptionally great. Blades are defined by the variety 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 general rule, the thicker the metal, the coarser the blade you will need to cut it and vice versa. The table below contains all the info you will require to pick the right 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 4
0.38
15
0.8
1.0 to 1.3

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 purchase every grade of saw blade; a basic selection of coarse, medium and fine must be completely adequate. Guarantee you purchase more of the medium grade (2/0 or 1/0) as these are what you will utilize most often.

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

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
0.34
17.5
0.7
0.9 to 1.1

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

Saw blade Grade 8/0
0.17
30
0.3
Up to 0.4

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

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

Setting up a blade into a saw:

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are using is too tough for that particular kind of drill. Some drills are harder than others so inspect their viability before you purchase.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for entirely that function. A durable base is integrated with a movable chuck installed on a column, which is controlled by a lever at the side. The base can help with a clamp to hold work firmly assisting to ensure an exact result every time.

Save this for later on.

Marking out and determining: Before beginning to saw, your metal needs to be clearly 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 are comparable to a compass however with 2 points). If you wish to move a more complex design onto metal, copy it onto tracing paper and cover the reverse with graphite as typical. Before moving to the metal surface area, rub it over gently with Plasticine so that a sticky film is left, which will reveal up the pencil marks produced when you re-trace. Remove the tracing paper and go over the pencil lines with a scriber once you have actually re-traced the design onto the metal.

My drills keep breaking: A blunt drill bit will break more quickly, as we intuitively use more pressure if it doesnt seem cutting. They are likewise susceptible to breakages if not secured correctly in the chuck.

Piercing.

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

My saw blades keep breaking: Dont anguish this is perfectly typical and practise makes ideal. Examine the tension of your blade for slackness and make sure you are using the correct blade size/metal combination.

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

Sawing straight lines: Straight lines are best tackled with the saw tilted a little forward utilizing long, smooth strokes.

Repairing:.

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 facing forward, and you ought to be seated so that your working area is around mid-chest height.
Position the blade on the outside of your significant line and carefully draw the blade down. Eliminate the saw and repeat a couple of times up until you have a little indent to guide the blade.
Now start to carefully move the saw up and down keeping in mind that the blade cuts on the downward motion and merely re-positions on the upward. If you are having difficulty getting the blade to bite you can apply some beeswax which is sold in blocks, to assist alleviate the movement.
Saw on the outside of your significant line and try to preserve a gentle and stable action.
When the cutting is total, undo the clamp at the top of the saw and pull the frame to eliminate it from the work, or simply bring it back along the cutting line if that is possible.
Submit the rough edge to finish.

Archimedian Hand Drill: This is a little spring loaded drill, which works using a deal with at the top which is pushed down and drew back approximately turn the chuck at the tip. This requires both hands to use efficiently.

Why Pierce? Piercing is needed when you require access to a location which would otherwise be difficult or hard to reach e.g. the centre of a circle. 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 outdoors 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 managed by a foot pedal and can be utilized with a big series of various accessories including drill bits.

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

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 wooden deal with ought to face you and the blade secures need to be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and secure completion furthest away into your frame using the wing-nut. (Do not be tempted to tighten with pliers as this deteriorates the screw thread).
Push carefully against the handle with your chest which will trigger the frame to bend, and tighten up the 2nd wing-nut to secure the blade.
Release the frame and inspect the tension of the blade by plucking it. (Failure to secure your blade with the right tension will result in it breaking as soon as you start to saw).

My saw blades keep sticking: Apply some form of lube to ease the sawing motion. Some jewellers utilize spittle, but you can also use beeswax. Just run it along the blade and continue to saw.

Centre punch: A centre punch is also a steel marker with a sharp point similar to a scriber. It is and has a shallow suggestion utilized in conjunction with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automated centre punches which dont need a hammer and rather have a push button action.

Saw frames: A jewellers saw frame is similar in style to a little fretsaw and is made of springy steel which holds the blade in position under tension. There have been some brand-new developments in frame style over the previous few years and it is now possible to purchase more innovative versions which produce the stress in the saw blade for you. Instead the stress is produced via a cam-lever mechanism within the blade clamp, which enables a quick release and positioning of the blade with the flick of a lever. Saw blades: Blades for a jewellers piercing saw are sold in bundles of 12, or by the gross (144) and come in a selection of grades which vary from really coarse to exceptionally great. By drilling a little hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, enabling you to saw from the within out, rather than the outside in.

Bow drill: A bow drill is a conventional hand drill which can be used with one hand. It has a basic twisting system which is created with a pull/push movement utilizing a wood baton and a piece of string. It is simple to manage and is ideal for a novice.

My arm is injuring: Check your seating position is right and try to relax. Dont be tempted to require the saw, you are simply assisting it so let the blade will do the work.

Drill bits: The most typical type of drill bits are twist drills which cut when rotated in a clockwise instructions. They are made from a range of toughened products and range in size from 0.3 mm upwards. Drills can become blunt remarkably quickly so its suggested to purchase multiples of the sizes you utilize most often.

Piercing an access hole for sawing:.

The most important thing to keep in mind when drilling a hole is to keep your drill bit totally 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.

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

Rotary Hand Drill: Rotary hand drills have the motor consisted of within the hand piece and either run off of the power supply or can be charged up to utilize cordless. They have the very same multi-purpose functionality of a pendant drill and can be used with a large range of accessories. Rotary hand drills can be used in conjunction with a drill stand to ensure vertical drilling.

Beginning to Saw:.

As soon as your style is scribed onto the metal, recognize a position within the waste product to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the appropriate drill size to refer the saw blade you intend to use, (please refer to chart) and insert into the chuck ensuring it is gripped securely.
Drill the hole. Start slowly making sure the drill bit has actually found its position. As soon as in position increase the speed and lower with a gentle but continuous pressure until all the way through..
Now, undo your saw blade at the clamp nearest the manage and thread the blade through the hole from the top. As soon as through, re-clamp your blade making sure the tension is correct.
Saw out your shape.
Once sawing is complete, eliminate the saw by un-clamping the blade nearest the manage once again.
Submit to end up.

Fixing:.

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