A Guide to Sawing & Piercing

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There have been some new developments in frame style over the past couple of years and it is now possible to acquire more sophisticated versions which create the tension in the saw blade for you. Rather the tension is developed by means of 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 frames: A jewellers saw frame is similar in design to a little fretsaw and is made from springy steel which holds the blade in position under stress. Blades are held in location by wing-nut clamps at either end of the saw which are tightened up by hand. 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. A 3 inch frame is an excellent general function size for small scale tasks, however the choice is down to personal preference.

When buying your frame is whether you desire an adjustable or a set style, another decision you need to make. An adjustable frame permits you to change the size to accommodate broken blades where as a fixed design will only take standard size blades as they are offered.

Sawing

Saw piercing is most likely to be one of the first significant 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. Most of us are familiar with the idea of sawing wood, numerous discover metal a little temperamental at initially, which is why we have actually put together this guide. Our goal is to help you with both tools and strategy, which will, (in addition to some persistence and practice), start you off on the proper course to successful sawing every time.

Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and be available in a choice of grades which range from extremely coarse to exceptionally 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 rule, the thicker the metal, the coarser the blade you will need to suffice and vice versa. The table listed below contains all the information you will require to select 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 1
0.3
19
0.7
0.8 to 1.0

You will not require to buy every grade of saw blade; a basic selection of coarse, medium and fine ought to be perfectly sufficient. 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 5/0
0.2
28
0.4
0.4 to 0.55

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

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

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 6/0
0.18
32
0.4
0.35 to 0.5

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

Saw blade Grade 8/0
0.17
30
0.3
As much as 0.4

Installing a blade into a saw:

Piercing a gain access to hole for sawing:.

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

Beginning 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 combination 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 rather have a push button action.

The drill keeps walking around and wont find its position: Make sure you have actually marked the drilling position plainly with a small dent to assist the drill. Also guarantee the drill is fitted properly into the chuck, it may not be straight. Above all, make sure the drill itself is completely upright.

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 range of toughened products and variety in size from 0.3 mm upwards. Drills can become blunt remarkably rapidly so its a good idea to purchase multiples of the sizes you use most regularly.

When your style is scribed onto the metal, determine a position within the waste material to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the appropriate drill size to correspond with the saw blade you intend to utilize, (please describe chart) and insert into the chuck making certain it is gripped tightly.
Drill the hole. Start slowly making certain the drill bit has actually found its position. When in position increase the speed and press down with a constant however gentle pressure up until all the method 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 ensuring the stress is right.
Saw out your shape.
Remove the saw by un-clamping the blade nearest the deal with again as soon as sawing is complete.
File to finish.

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 produced with a pull/push motion using a wooden baton and a piece of string. It is simple to control and is ideal for a novice.

Conserve this for later.

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 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 marked line and gently draw the blade down. Remove the saw and repeat a number of times until you have a small indent to direct 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 help ease the motion.
Saw on the exterior of your marked line and attempt to keep a steady and mild action.
Once the cutting is total, 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 finish.

Archimedian Hand Drill: This is a small spring loaded drill, which works utilizing a manage at the top which is pushed down and drew back as much as rotate the chuck at the idea. This requires both hands to utilize effectively.

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. There have been some brand-new advancements in frame style over the previous couple of years and it is now possible to acquire more advanced variations which create the tension in the saw blade for you. Instead the stress is created through a cam-lever mechanism within the blade clamp, which allows 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 very coarse to incredibly great. By drilling a small 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 inside out, rather than the outside in.

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

Tools for Piercing: There are several ways to drill a hole. You can utilize hand tools or mechanised tools; the principle is much the very same. When drilling a hole is to keep your drill bit completely vertical and upright, the most crucial thing to keep in mind. This is why all drilling tools have an adjustable chuck to grip the drill bit securely, whilst keeping it fully vertical. Chucks are either fully adjustable to take all sizes of drill or interchangeable, indicating you will require to alternate to accommodate different drill bits.

Piercing.

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 performance of a pendant drill and can be used with a large range of devices. Rotary hand drills can be utilized in conjunction with a drill stand to ensure vertical drilling.

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 require the blade.

My arm is hurting: Check your seating position is right and try to relax. Also dont be lured to force the saw, you are just guiding it so let the blade will do the work.

Defining and measuring: Before beginning to saw, your metal must be clearly marked and measured so you have a guide to work to. Lines can be scribed onto metal utilizing a scriber or a set of dividers (which are comparable to a compass but with 2 points). If you want to move a more complicated design onto metal, copy it onto tracing paper and cover the reverse with graphite as normal. Before moving to the metal surface, rub it over lightly with Plasticine so that a sticky film is left, which will show up the pencil marks produced 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.

Fixing:.

Why Pierce? Piercing is needed when you need access to a location which would otherwise be impossible or tough 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, enabling you to saw from the within out, instead of the outside in.

Fixing:.

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 manage need 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 clamp completion furthest away into your frame using the wing-nut. (Do not be tempted to tighten with pliers as this deteriorates the screw thread).
Then push carefully against the handle with your chest which will trigger the frame to bend, and tighten the 2nd wing-nut to protect the blade.
Release the frame and inspect the stress of the blade by plucking it. (Failure to protect your blade with the best tension will result in it breaking as soon as you start to saw).

My saw blades keep breaking: Dont anguish this is completely normal and practise makes perfect. Inspect the tension of your blade for slackness and make sure you are using the correct blade size/metal mix.

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

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

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 mounted on a column, which is controlled by a lever at the side. The base can assist in a clamp to hold work safely helping to make sure a precise outcome whenever.

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, simply stop and permit the tools to cool off.

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 likewise vulnerable to damages if not secured properly in the chuck.

My drill isnt cutting: If the drill bit will not bite it may be due to the fact that it is blunt or that the metal you are using is too hard for that specific kind of drill. Some drills are harder than others so inspect their suitability prior to you buy.

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