A Guide to Sawing & Piercing

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Saw frames: A jewellers saw frame is similar in design to a small fretsaw and is made of springy steel which holds the blade in position under tension. Blades are held 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 vary in size from 3 inch to 6 inch. A 3 inch frame is an excellent general function size for little scale projects, however the choice is down to individual choice.

Saw piercing is most likely to be among the very first major jobs you attempt as a jeweller. It is the primary step in the improvement of an easy sheet of metal into something totally different and holds unlimited possibilities. Many of us are familiar with the idea of sawing wood, many discover metal a little unstable at first, which is why we have actually put together this guide. Our aim is to assist you with both tools and strategy, which will, (in addition to some persistence and practice), begin you off on the proper course to successful sawing whenever.

Another decision you need to make when acquiring your frame is whether you want an adjustable or a fixed design. An adjustable frame allows you to modify the size to accommodate broken blades where as a set style will only take basic size blades as they are offered.

There have actually been some brand-new developments in frame design over the past couple of years and it is now possible to buy more innovative versions which create the stress in the saw blade for you. Instead the tension is created 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.

Sawing

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and can be found in a selection of grades which vary from very coarse to incredibly great. Blades are identified by the number 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 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 info you will require to pick the proper 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 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 3/0
0.24
23.5
0.5
0.6 to 0.7

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

You will not require to purchase every grade of saw blade; a standard selection of coarse, medium and fine should be completely appropriate. Guarantee you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize most typically.

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

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

Saw blade Grade 8/0
0.17
30
0.3
Approximately 0.4

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

Setting up a blade into a saw:

Drill bits: The most common kind of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a range of toughened products and variety in size from 0.3 mm upwards. Drills can end up being blunt surprisingly quickly so its advisable to purchase multiples of the sizes you use most often.

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

Why Pierce? Piercing is needed when you need access to an area which would otherwise be impossible or challenging to reach e.g. the centre of a circle. By drilling a little hole you offer 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.

Bow drill: A bow drill is a standard hand drill which can be utilized with one hand. It has a simple twisting system which is developed with a pull/push motion using a wood baton and a piece of string. It is simple to control and is ideal for a novice.

Conserve this for later on.

The drill keeps moving 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 might not be straight. Above all, ensure the drill itself is fully upright.

My saw blades keep breaking: Dont misery this is perfectly regular and practise makes ideal. However, examine the tension of your blade for slackness and ensure you are utilizing the appropriate blade size/metal mix.

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

Defining and measuring: 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 utilizing a scriber or a set of dividers (which resemble a compass however with 2 points). Copy it onto tracing paper and cover the reverse with graphite as normal if you desire to transfer a more intricate style onto metal. Then before moving to the metal surface, rub it over gently with Plasticine so that a sticky film is left, which will appear the pencil marks developed when you re-trace. Eliminate the tracing paper and go over the pencil lines with a scriber when you have actually re-traced the style onto the metal.

Beginning to Saw:.

Seat yourself at the bench and hold the operate in position on the bench peg, holding the saw in your opposite hand.
Your saw ought 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 exterior of your significant line and gently draw the blade down. Remove the saw and repeat a number of times up until you have a small indent to assist the blade.
Now start to carefully move the saw up and down keeping in mind that the blade cuts on the down motion and simply re-positions on the upward. If you are having trouble getting the blade to bite you can apply some beeswax which is sold in blocks, to help ease the motion.
Saw on the outside of your significant line and try to maintain a mild and consistent action.
When the cutting is complete, reverse the clamp at the top of the saw and pull the frame down to eliminate it from the work, or merely bring it back along the cutting line if that is possible.
File the rough edge to end up.

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. Stopping working that, just stop and allow the tools to cool down.

Piercing a gain access to hole for sawing:.

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

My drill isnt cutting: If the drill bit wont bite it might be because it is blunt or that the metal you are using is too difficult for that specific type of drill. Some drills are tougher than others so examine their viability prior to you buy.

Archimedian Hand Drill: This is a little spring filled drill, which works using a handle at the top which is pressed down and pulled back approximately rotate the chuck at the pointer. This requires both hands to utilize successfully.

As soon as your design is scribed onto the metal, recognize a position within the waste material to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the right drill size to refer the saw blade you mean to utilize, (please describe chart) and insert into the chuck ensuring it is gripped firmly.
Drill the hole. Start gradually making sure the drill bit has found its position. As soon as in position increase the speed and push down with a continuous however gentle pressure up until all the method through..
Now, reverse your saw blade at the clamp nearest the handle and thread the blade through the hole from the top. Once through, re-clamp your blade making certain the tension is correct.
Saw out your shape.
Once sawing is total, remove the saw by un-clamping the blade nearest the handle again.
File to end up.

Piercing.

Repairing:.

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

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

Fixing:.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for solely that purpose. A tough base is combined 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 helping to make sure a precise outcome whenever.

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

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

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 manage must face you and the blade secures ought 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 utilizing the wing-nut. (Do not be tempted to tighten with pliers as this compromises the screw thread).
Then push carefully against the manage with your chest which will cause the frame to bend, and tighten up the 2nd wing-nut to protect the blade.
Release the frame and inspect the tension of the blade by plucking it. You are searching for a distinctive ping to reveal the tension is appropriate. If you dont hear the ping merely undo and duplicate the process once again till its right. (Failure to secure your blade with the ideal stress will lead to it breaking as soon as you start to saw).

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

Saw frames: A jewellers saw frame is similar in design to a little fretsaw and is made of springy steel which holds the blade in position under stress. There have actually been some brand-new advancements in frame style over the past couple of 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 system within the blade clamp, which enables a fast 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 vary from very coarse to very great. By drilling a small hole you offer access to the saw blade which can then be fed through and re-clamped into the frame, enabling you to saw from the inside out, rather than 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 contains the chuck. It is managed by a foot pedal and can be utilized with a huge series of different attachments consisting of drill bits.

My arm is injuring: Check your seating position is correct and attempt to unwind. Dont be lured to force the saw, you are merely guiding it so let the blade will do the work.

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