A Guide to Sawing & Piercing

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There have been some new advancements in frame design over the previous few years and it is now possible to acquire advanced variations which produce the tension in the saw blade for you. One such design is from a company called Knew Concepts who have a series of lightweight aluminium frames which do not flex. Instead the tension is developed by means of a cam-lever system within the blade clamp, which enables a fast release and positioning of the blade with the flick of a lever. These particular clamps can likewise be turned 45 degrees which assists in sawing into tough areas.

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

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. 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.

Saw piercing is most likely to be among the very first major jobs you try as a jeweller. It is the first action in the change of a basic sheet of metal into something totally various and holds limitless possibilities. Most of us are familiar with the concept of sawing wood, numerous discover metal a little temperamental at first, which is why we have actually put together this guide. Our aim is to help you with both tools and strategy, which will, (in addition to some patience and practice), start you off on the right path to effective sawing each time.

Sawing

Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and can be found in a choice of grades which vary from very coarse to extremely great. Blades are defined 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 general guideline, the thicker the metal, the coarser the blade you will require to cut it and vice versa. The table listed below contains all the info you will require to pick 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 3
0.36
16
0.8
0.9 to 1.2

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

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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 6/0
0.18
32
0.4
0.35 to 0.5

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

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 8/0
0.17
30
0.3
Approximately 0.4

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

Installing a blade into a saw:

Fixing:.

Rotary Hand Drill: Rotary hand drills have the motor consisted of within the hand piece and either run of the power supply or can be charged up to utilize cordless. They have the same multi-purpose performance of a pendant drill and can be utilized with a vast array of accessories. Rotary hand drills can be utilized in combination with a drill stand to make sure vertical drilling.

As soon as your style is scribed onto the metal, identify a position within the waste material to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the correct drill size to correspond with the saw blade you plan to use, (please refer to chart) and insert into the chuck making certain it is grasped securely.
Drill the hole. Start gradually making certain the drill bit has actually discovered its position. As soon as in position increase the speed and lower with a continuous however mild pressure up until all the way through..
Now, reverse 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 correct.
Saw out your shape.
Get rid of the saw by un-clamping the blade nearest the deal with again as soon as sawing is total.
File to finish.

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, taking care not to require the blade.

My arm is hurting: Check your seating position is correct and attempt to unwind. Dont be lured to require the saw, you are simply assisting it so let the blade will do the work.

Conserve this for later.

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

Drill bits: The most typical kind of drill bits are twist drills which cut when rotated in a clockwise instructions. They are made from a variety of toughened materials and variety in size from 0.3 mm upwards. Drills can end up being blunt remarkably quickly so its a good idea to buy multiples of the sizes you utilize most frequently.

Fixing:.

Defining 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 utilizing a scriber or a set of dividers (which are similar to 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 complicated design onto metal. Then prior to moving to the metal surface, rub it over lightly with Plasticine so that a sticky film is left, which will appear the pencil marks created when you re-trace. When you have re-traced the style onto the metal, get rid of the tracing paper and go over the pencil lines with a scriber.

Bow drill: A bow drill is a conventional hand drill which can be utilized with one hand. It has a basic twisting mechanism which is produced with a pull/push movement using a wooden baton and a piece of string. It is easy to control and is ideal for a newbie.

My drill isnt cutting: If the drill bit wont 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 harder than others so check their viability before you buy.

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

Why Pierce? Piercing is needed when you need access to a location which would otherwise be tough or difficult to reach e.g. the centre of a circle. By drilling a little hole you provide 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, instead of the outside in.

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 wood deal with should face you and the blade clamps need to be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and secure completion outermost away into your frame utilizing the wing-nut. (Do not be tempted to tighten with pliers as this weakens the screw thread).
Push gently versus the handle with your chest which will trigger the frame to flex, and tighten up the second wing-nut to protect the blade.
Launch the frame and check the tension of the blade by plucking it. (Failure to protect your blade with the ideal tension will result in it breaking as quickly as you start to saw).

Archimedian Hand Drill: This is a little spring filled drill, which works utilizing a manage at the top which is pushed down and drew back up to rotate the chuck at the idea. This needs both hands to use successfully.

Piercing.

Starting to Saw:.

The drill keeps moving around and wont discover its position: Make sure you have actually marked the drilling position clearly with a small damage to guide the drill. Ensure the drill is fitted correctly into the chuck, it may not be straight. Above all, ensure the drill itself is totally upright.

Bench Mounted Pillar Drill: This is the ultimate 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 safely assisting to make sure an accurate result each time.

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 tension. There have been some new developments in frame style over the past couple of years and it is now possible to purchase more innovative variations which produce the stress in the saw blade for you. Rather the tension is created through 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 offered in bundles of 12, or by the gross (144) and come in a selection of grades which vary from extremely coarse to extremely 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, allowing you to saw from the within out, rather than the outdoors in.

Seat yourself at the bench and hold the work 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 dealing with forward, and you must be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your marked line and carefully draw the blade down. Eliminate the saw and repeat a number of times until you have a little indent to assist the blade.
Now start to carefully 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 difficulty getting the blade to bite you can use some beeswax which is offered in blocks, to assist alleviate the motion.
Saw on the exterior of your significant line and attempt to maintain a stable and mild action.
As soon as the cutting is complete, undo the clamp at the top of the saw and pull the frame down to remove it from the work, or just bring it back along the cutting line if that is possible.
Submit 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 enable the tools to cool off.

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has a suspended motor and a versatile shaft connected to a hand piece, which consists of the chuck. It is controlled by a foot pedal and can be used with a substantial series of different attachments including drill bits.

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

My saw blades keep breaking: Dont misery this is perfectly typical and practise makes best. Inspect the stress of your blade for slackness and make sure you are utilizing the correct blade size/metal combination.

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

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

Piercing an access hole for sawing:.

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

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