A Guide to Sawing & Piercing

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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. 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.

Sawing

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

Saw piercing is likely to be among the first major tasks you try as a jeweller. It is the initial step in the improvement of a simple sheet of metal into something entirely various and holds endless possibilities. Although many of us are familiar with the concept of sawing wood, lots of discover metal a little unstable 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 patience and practice), begin you off on the right path to effective sawing whenever.

There have been some brand-new developments in frame style over the past couple of years and it is now possible to buy more innovative variations which develop the stress in the saw blade for you. Instead the stress is created by means of a cam-lever system 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 sold in packages of 12, or by the gross (144) and come in a choice of grades which range from extremely coarse to extremely great. The table listed below consists of all the details you will need to choose the right 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 5/0
0.2
28
0.4
0.4 to 0.55

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 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

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

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

You will not require to acquire every grade of saw blade; a fundamental choice of coarse, medium and fine must be perfectly appropriate. Nevertheless, guarantee you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize most frequently.

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

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

Saw blade Grade 8/0
0.17
30
0.3
Approximately 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 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 substantial variety of different attachments consisting of drill bits.

Drill bits: The most typical kind of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a variety of toughened products and range 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 utilize most often.

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

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

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 design over the past few years and it is now possible to acquire more sophisticated versions which create the tension in the saw blade for you. Instead the stress is created by means of 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 packages of 12, or by the gross (144) and come in a selection of grades which range from really coarse to incredibly 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, permitting you to saw from the inside out, rather than the outside in.

When your design is scribed onto the metal, identify 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 ensuring 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 push down with a gentle however constant pressure till all the method through..
Now, undo 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 stress is right.
Saw out your shape.
Get rid of the saw by un-clamping the blade nearest the handle once again as soon as sawing is total.
File to end up.

My saw blades keep breaking: Dont despair this is perfectly normal and practise makes best. However, examine the tension of your blade for slackness and make certain you are utilizing the proper blade size/metal combination.

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 handle need to face you and the blade clamps must be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and secure the end furthest away into your frame using the wing-nut. (Do not be lured to tighten up with pliers as this weakens the screw thread).
Then push carefully against the manage with your chest which will cause the frame to bend, and tighten up the second wing-nut to protect the blade.
Release the frame and examine the stress of the blade by plucking it. You are trying to find a distinct ping to show the stress is proper. If you do not hear the ping simply reverse and duplicate the procedure once again till its. (Failure to secure your blade with the right stress will result in it breaking as quickly as you begin to saw).

My arm is harming: Check your seating position is right and attempt to unwind. Likewise do not be tempted to require the saw, you are merely assisting it so let the blade will do the work.

Defining and measuring: Before starting to saw, your metal needs to be clearly marked 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 however with two points). If you wish to move a more complex style onto metal, copy it onto tracing paper and cover the reverse with graphite as typical. Prior to transferring to the metal surface area, rub it over gently with Plasticine so that a sticky film is left, which will reveal up the pencil marks developed when you re-trace. As soon as you have actually re-traced the design onto the metal, get rid of the tracing paper and discuss the pencil lines with a scriber.

Conserve this for later.

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

The most important thing to keep in mind when drilling a hole is to keep your drill bit upright and entirely vertical. Chucks are either totally adjustable to take all sizes of drill or interchangeable, meaning you will require to alternate to accommodate various drill bits.

Fixing:.

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, merely stop and permit the tools to cool off.

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

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

Piercing.

My drill isnt cutting: If the drill bit wont bite it may be due to the fact that it is blunt or that the metal you are utilizing is too hard for that specific kind of drill. Some drills are tougher than others so examine their viability before you buy.

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

Starting 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 held in a vertical position with the blade facing forward, and you need to be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your significant line and carefully draw the blade down. Remove the saw and repeat a couple of times until you have a little indent to direct the blade.
Now start to gently move the saw up and down keeping in mind that the blade cuts on the down 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 sold in blocks, to assist ease the movement.
Saw on the exterior of your marked line and attempt to keep a gentle and consistent action.
When 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 simply bring it back along the cutting line if that is possible.
File the rough edge to finish.

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

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

Repairing:.

Why Pierce? When you need access to an area which would otherwise be difficult or challenging to reach e.g. the centre of a circle, piercing is required. 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 inside out, rather than the outside in.

The drill keeps moving and wont discover its position: Make sure you have actually marked the drilling position clearly with a tiny dent to assist the drill. Also make sure the drill is fitted correctly into the chuck, it might not be directly. Above all, make sure the drill itself is totally upright.

Centre punch: A centre punch is likewise a steel marker with a sharp point comparable to a scriber. It is and has a shallow suggestion utilized in conjunction with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automated centre punches which dont require a hammer and instead have a push button action.

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

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