A Guide to Sawing & Piercing

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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. 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.

Sawing

When purchasing your frame is whether you want an adjustable or a set style, another choice you require to make. An adjustable frame enables you to alter the size to accommodate damaged blades where as a set style will just take standard size blades as they are offered.

Saw piercing is most likely to be one of the very first significant tasks you attempt as a jeweller. It is the very first step in the transformation of a basic sheet of metal into something entirely various and holds unlimited possibilities. Many of us are familiar with the concept of sawing wood, numerous find metal a little unstable at first, which is why we have actually put together this guide. Our objective is to assist you with both tools and method, which will, (in addition to some patience and practice), begin you off on the proper path to effective sawing every time.

There have actually been some brand-new advancements in frame design over the previous few years and it is now possible to purchase more innovative versions 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 light-weight aluminium frames which do not flex. Rather the tension is produced through a cam-lever mechanism within the blade clamp, which makes it possible for a fast release and positioning of the blade with the flick of a lever. These particular clamps can likewise be turned 45 degrees which helps with sawing into hard locations.

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and come in a selection of grades which vary from really coarse to exceptionally great. The table below includes all the information you will require to choose 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 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 3
0.36
16
0.8
0.9 to 1.2

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

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

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

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

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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

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

Setting up a blade into a saw:

Piercing.

The drill keeps walking around and wont discover its position: Make sure you have actually marked the drilling position clearly with a small damage to assist the drill. Guarantee the drill is fitted properly into the chuck, it might not be directly. Above all, ensure the drill itself is completely upright.

Starting to Saw:.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for entirely that purpose. 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 facilitate a clamp to hold work firmly assisting to guarantee an accurate result every time.

Scriber: A scriber is a fine marking tool with a narrow and long pointer. It is utilized to scribe styles onto metal and can be utilized to mark the positions for 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, taking care not to require the blade.

Why Pierce? When you require access to an area which would otherwise be difficult or difficult to reach e.g. the centre of a circle, piercing is needed. By drilling a small hole you offer 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.

Archimedian Hand Drill: This is a little spring loaded drill, which works using a deal with at the top which is lowered and drew back up to turn the chuck at the pointer. This needs both hands to utilize efficiently.

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 functionality of a pendant drill and can be utilized with a wide variety of devices. Rotary hand drills can be used in combination with a drill stand to guarantee vertical drilling.

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

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Troubleshooting:.

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 tension. There have actually been some brand-new developments in frame style over the previous couple of years and it is now possible to purchase more sophisticated variations which develop the stress in the saw blade for you. Rather the tension is developed via a cam-lever mechanism 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 offered in packages of 12, or by the gross (144) and come in a choice of grades which vary from really coarse to extremely 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, permitting you to saw from the within out, rather than the outside in.

Fixing:.

Piercing a gain access to hole for sawing:.

Drill bits: The most common kind of drill bits are twist drills which cut when turned in a clockwise direction. They are made from a variety of toughened materials and range in size from 0.3 mm upwards. Drills can become blunt surprisingly quickly so its a good idea to buy multiples of the sizes you use most frequently.

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

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 dealing with forward, and you must be seated so that your working area is around mid-chest height.
Position the blade on the outside of your marked line and carefully draw the blade down. Get rid of the saw and repeat a couple of times until you have a little indent to direct the blade.
Now begin to carefully move the saw up and down bearing in mind that the blade cuts on the downward motion and merely 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 alleviate the movement.
Saw on the exterior of your marked line and attempt to maintain a consistent and gentle action.
When the cutting is complete, undo 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.
Submit the rough edge to finish.

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 enable the tools to cool off.

My saw blades keep breaking: Dont anguish this is perfectly typical and practise makes best. Nevertheless, examine the tension of your blade for slackness and ensure you are utilizing the appropriate blade size/metal combination.

Bow drill: A bow drill is a conventional hand drill which can be used with one hand. It has a simple twisting system which is created with a pull/push motion utilizing a wood baton and a piece of string. It is easy to manage and is perfect for a newbie.

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 contains the chuck. It is controlled by a foot pedal and can be utilized with a huge series of various attachments consisting of drill bits.

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

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 using the wing-nut. (Do not be tempted to tighten up with pliers as this damages the screw thread).
Then push carefully against the manage with your chest which will cause the frame to flex, and tighten the 2nd wing-nut to secure the blade.
Launch the frame and check the stress of the blade by plucking it. You are trying to find a distinctive ping to reveal the tension is right. If you dont hear the ping simply undo and repeat the procedure once again up until its. (Failure to secure your blade with the best tension will result in it breaking as quickly as you begin to saw).

My arm is hurting: Check your seating position is correct and try to relax. Dont be tempted to require the saw, you are merely directing it so let the blade will do the work.

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

Marking out and measuring: Before beginning to saw, your metal must be clearly significant and determined 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). If you want to move a more complicated style 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 movie is left, which will show up the pencil marks created when you re-trace. Get rid of 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.

Centre punch: A centre punch is likewise a steel marker with a sharp point comparable to a scriber. It is and has a shallow pointer utilized 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.

My saw blades keep sticking: Apply some form of lubricant to relieve the sawing movement. Some jewellers use spittle, but you can likewise use beeswax. Simply run it along the blade and continue to saw.

As soon as your design is scribed onto the metal, determine a position within the waste material to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the appropriate drill size to correspond with the saw blade you plan to use, (please describe chart) and insert into the chuck making sure it is gripped securely.
Drill the hole. Start gradually making certain the drill bit has found its position. As soon as in position increase the speed and lower with a constant but mild pressure up 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. As soon as through, re-clamp your blade making certain the tension is correct.
Saw out your shape.
As soon as sawing is complete, remove the saw by un-clamping the blade nearest the manage again.
File to finish.

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