A Guide to Sawing & Piercing

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

There have been some brand-new advancements in frame style over the previous couple of years and it is now possible to acquire more innovative versions which create the tension in the saw blade for you. One such style is from a company called Knew Concepts who have a series of light-weight aluminium frames which do not flex. Instead the stress is created via a cam-lever mechanism within the blade clamp, which enables a fast release and positioning of the blade with the flick of a lever. These particular clamps can also be turned 45 degrees which assists in sawing into tough locations.

Sawing

Saw piercing is likely to be among the first significant jobs you try as a jeweller. It is the very first action in the transformation of a simple sheet of metal into something entirely various and holds limitless possibilities. Although the majority of us recognize with the concept of sawing wood, lots of discover metal a little unstable at initially, which is why we have actually created this guide. Our aim is to help you with both tools and strategy, which will, (in addition to some perseverance and practice), begin you off on the correct course to successful sawing every time.

Saw frames: A jewellers saw frame is comparable in style to a little fretsaw and is made of springy steel which holds the blade in position under stress. 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 blades: Blades for a jewellers piercing saw are offered 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 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 general rule, the thicker the metal, the coarser the blade you will require to cut it and vice versa. The table below contains all the info you will require to select the appropriate 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
Up to 0.4

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

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

You will not require to acquire every grade of saw blade; a fundamental selection 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 utilize most often.

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 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 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
0.38
15
0.8
1.0 to 1.3

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

Setting up a blade into a saw:

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for solely that function. A sturdy base is integrated 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 safely helping to make sure an accurate result every time.

My saw blades keep sticking: Apply some kind of lube to ease the sawing movement. Some jewellers use spittle, but you can also 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 little amount of water or an oil based drilling coolant. Stopping working that, just stop and enable the tools to cool down.

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 end up being blunt remarkably quickly so its advisable to buy multiples of the sizes you utilize most often.

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

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, making sure not to force the blade.

Fixing:.

Tools for Piercing: There are several 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 totally vertical. 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, meaning you will need to alternate to accommodate various drill bits.

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 exact same multi-purpose performance of a pendant drill and can be utilized with a vast array of accessories. Rotary hand drills can be used in conjunction with a drill stand to ensure vertical drilling.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw should be kept in a vertical position with the blade dealing with forward, and you should be seated so that your working location is around mid-chest height.
Position the blade on the exterior of your significant line and carefully draw the blade down. Eliminate 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 remembering that the blade cuts on the downward movement and just re-positions on the upward. If you are having problem getting the blade to bite you can use some beeswax which is offered in blocks, to assist relieve the motion.
Saw on the exterior of your significant line and try to maintain a steady and gentle action.
As soon as the cutting is complete, reverse 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 end up.

My arm is hurting: Check your seating position is right and attempt to relax. Do not be lured to require the saw, you are just directing it so let the blade will do the work.

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

Beginning to Saw:.

Once your style 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 proper drill size to refer the saw blade you intend to use, (please refer to chart) and insert into the chuck making sure it is grasped tightly.
Drill the hole. Start slowly making certain the drill bit has discovered its position. When in position increase the speed and lower with a gentle but constant pressure till 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. When through, re-clamp your blade making certain the tension is correct.
Saw out your shape.
Eliminate the saw by un-clamping the blade nearest the manage once again as soon as sawing is total.
Submit to finish.

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 secures must be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp the end outermost away into your frame utilizing the wing-nut. (Do not be tempted to tighten with pliers as this deteriorates the screw thread).
Then push gently versus the handle with your chest which will cause the frame to flex, and tighten up the 2nd wing-nut to secure the blade.
Release the frame and inspect the tension of the blade by plucking it. You are looking for a distinctive ping to show the stress is proper. If you do not hear the ping merely undo and repeat the procedure once again till its. (Failure to protect your blade with the right tension will lead to it breaking as quickly as you begin to saw).

Centre punch: A centre punch is also a steel marker with a sharp point similar 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 do not need a hammer and rather have a push button action.

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 difficult for that particular kind of drill. Some drills are harder than others so inspect their suitability before you purchase.

The drill keeps moving around and will not discover its position: Make sure you have actually marked the drilling position plainly with a tiny damage to guide the drill. Guarantee the drill is fitted properly into the chuck, it may not be straight. Above all, guarantee the drill itself is fully upright.

Conserve this for later.

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

Piercing an access hole for sawing:.

Piercing.

Repairing:.

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

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a flexible shaft attached to a hand piece, which consists of the chuck. It is controlled by a foot pedal and can be utilized with a big variety of various accessories including drill bits.

Archimedian Hand Drill: This is a little spring packed drill, which works utilizing a deal with at the top which is pressed down and drew back up to rotate the chuck at the idea. This needs both hands to utilize effectively.

Defining and determining: Before beginning to saw, your metal needs to be plainly significant and measured 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 but with two points). Copy it onto tracing paper and cover the reverse with graphite as typical if you want to transfer a more intricate design onto metal. Prior to transferring to the metal surface, rub it over lightly with Plasticine so that a sticky film is left, which will show up the pencil marks developed 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.

Saw frames: A jewellers saw frame is similar 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 style over the past couple of years and it is now possible to purchase more advanced versions which produce the tension in the saw blade for you. Rather the tension is produced 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. 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 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, allowing you to saw from the inside out, rather than the outdoors in.

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

Why Pierce? Piercing is required when you require access to a location which would otherwise be hard or difficult to reach e.g. the centre of a circle. By drilling a small 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 within out, rather than the outdoors in.

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