A Guide to Sawing & Piercing

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Saw frames: A jewellers saw frame is comparable in design to a small 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 vary in size from 3 inch to 6 inch.

Saw piercing is likely to be among the first major jobs you try as a jeweller. It is the initial step in the transformation of an easy sheet of metal into something entirely various and holds unlimited possibilities. Many of us are familiar with the principle of sawing wood, lots of find metal a little temperamental at first, which is why we have put together this guide. Our aim is to help you with both tools and technique, which will, (in addition to some perseverance and practice), start you off on the proper course to effective sawing whenever.

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

Sawing

There have been some brand-new developments in frame design over the previous couple of years and it is now possible to acquire more advanced variations which develop the stress in the saw blade for you. Instead the stress is developed via a cam-lever system 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 can be found in a selection of grades which vary from extremely coarse to incredibly great. Blades are identified by the variety of teeth per cm so for instance 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 guideline, the thicker the metal, the coarser the blade you will require to suffice and vice versa. The table listed below contains all the information you will need to choose the right blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Suggested gauge Of metal mm

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

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

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

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

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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

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

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

You will not need to acquire every grade of saw blade; a standard selection of coarse, medium and fine need to be completely sufficient. Ensure you purchase more of the medium grade (2/0 or 1/0) as these are what you will use most often.

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

Setting up a blade into a saw:

Bow drill: A bow drill is a standard hand drill which can be used with one hand. It has a basic twisting system which is produced with a pull/push movement using a wood baton and a piece of string. It is simple to manage and is perfect for a newbie.

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 require the blade.

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 tough for that particular type of drill. Some drills are tougher than others so examine their suitability prior to you buy.

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

Archimedian Hand Drill: This is a little spring packed drill, which works using a deal with at the top which is lowered and drew back approximately turn the chuck at the pointer. This requires both hands to utilize successfully.

My saw blades keep breaking: Dont anguish this is perfectly typical and practise makes best. Inspect the stress of your blade for slackness and make sure you are using the appropriate blade size/metal mix.

As soon as your style is scribed onto the metal, recognize a position within the waste material to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the right drill size to refer the saw blade you intend to use, (please describe chart) and insert into the chuck making certain it is gripped securely.
Drill the hole. Start gradually making certain the drill bit has discovered its position. When in position increase the speed and lower with a mild however continuous pressure until all the way through..
Now, reverse your saw blade at the clamp nearest the deal with and thread the blade through the hole from the top. When through, re-clamp your blade making certain the stress is appropriate.
Saw out your shape.
Get rid of the saw by un-clamping the blade nearest the deal with once again once sawing is total.
Submit to complete.

Marking out and determining: Before beginning 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 utilizing a scriber or a set of dividers (which resemble a compass but with two points). If you want to transfer a more complex design onto metal, copy it onto tracing paper and cover the reverse with graphite as normal. Before transferring to the metal surface area, rub it over gently with Plasticine so that a sticky movie is left, which will show up the pencil marks created when you re-trace. Remove the tracing paper and go over the pencil lines with a scriber as soon as you have actually re-traced the style onto the metal.

Piercing a gain access to hole for sawing:.

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

Why Pierce? When you require access to a location which would otherwise be difficult or difficult to reach e.g. the centre of a circle, piercing is needed. By drilling a little hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, allowing you to saw from the within out, rather than the outdoors in.

Seat yourself at the bench and hold the operate in position on the bench peg, holding the saw in your opposite hand.
Your saw needs to be held in a vertical position with the blade facing forward, and you need to be seated so that your working area is around mid-chest height.
Position the blade on the outside of your significant line and gently draw the blade down. Eliminate the saw and repeat a couple of times till you have a small indent to direct the blade.
Now begin to gently move the saw up and down keeping in mind that the blade cuts on the downward movement and just re-positions on the upward. If you are having trouble getting the blade to bite you can apply some beeswax which is offered in blocks, to assist relieve the movement.
Saw on the exterior of your significant line and try to keep a gentle and constant action.
As soon as the cutting is total, reverse the clamp at the top of the saw and pull the frame to remove it from the work, or merely bring it back along the cutting line if that is possible.
Submit the rough edge to complete.

My arm is hurting: Check your seating position is proper and attempt to unwind. Also do not be tempted to force the saw, you are just guiding it so let the blade will do the work.

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

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 been some new advancements in frame design over the previous couple of years and it is now possible to acquire more advanced variations which develop the tension in the saw blade for you. Rather the stress is produced by means of 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 blades: Blades for a jewellers piercing saw are sold in bundles of 12, or by the gross (144) and come in a choice of grades which vary from extremely coarse to exceptionally fine. By drilling a little hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, allowing you to saw from the inside out, rather than the outdoors in.

Troubleshooting:.

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

Repairing:.

Piercing.

Tools for Piercing: There are various ways to drill a hole. You can use hand tools or mechanised tools; the principle is much the same. The most essential thing to keep in mind when drilling a hole is to keep your drill bit upright and entirely vertical. This is why all drilling tools have an adjustable chuck to grip the drill bit securely, whilst keeping it totally vertical. Chucks are either fully adjustable to take all sizes of drill or interchangeable, suggesting you will need to alternate to accommodate various drill bits.

Starting to Saw:.

Centre punch: A centre punch is likewise a steel marker with a sharp point comparable to a scriber. It has a shallow tip and is used in conjunction with a hammer to mark the position for subsequent drill holes. It is also possible to get automatic centre punches which dont require a hammer and instead have a push button action.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is utilized for exclusively that purpose. A tough base is combined with a movable chuck mounted on a column, which is controlled by a lever at the side. The base can facilitate a clamp to hold work securely helping to make sure an accurate outcome whenever.

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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 variety of toughened products and range in size from 0.3 mm upwards. Drills can end up being blunt remarkably quickly so its suggested to buy multiples of the sizes you use most frequently.

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

Sit at your bench with your saw frame supported in between your chest and the edge of the bench or the V of your bench peg. The wooden handle must face you and the blade clamps must be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp completion outermost away into your frame utilizing the wing-nut. (Do not be tempted to tighten up with pliers as this deteriorates the screw thread).
Then push gently against the manage with your chest which will trigger the frame to flex, and tighten up the 2nd wing-nut to secure the blade.
Launch the frame and inspect the stress of the blade by plucking it. You are looking for a distinctive ping to show the tension is right. If you do not hear the ping merely undo and duplicate the procedure once again up until its. (Failure to protect your blade with the right tension will result in it breaking as quickly as you start to saw).

Sawing straight lines: Straight lines are best taken on with the saw tilted somewhat forward using long, smooth strokes.

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has a suspended motor and a versatile shaft attached to a hand piece, which contains the chuck. It is managed by a foot pedal and can be used with a big variety of different accessories consisting of drill bits.

The drill keeps moving and wont find its position: Make sure you have actually marked the drilling position plainly with a tiny damage to assist the drill. Ensure the drill is fitted properly into the chuck, it may not be directly. Above all, make sure the drill itself is totally upright.

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