A Guide to Sawing & Piercing

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There have actually been some brand-new developments in frame design over the previous few years and it is now possible to acquire more sophisticated versions which produce the stress in the saw blade for you. One such design is from a company called Knew Concepts who have a variety of lightweight aluminium frames which do not flex. Rather the stress is developed 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. These specific clamps can likewise be turned 45 degrees which helps with sawing into tough locations.

When acquiring your frame is whether you desire an adjustable or a fixed design, another decision you require to make. An adjustable frame allows you to change the size to accommodate broken blades where as a set design will only take standard size blades as they are sold.

Many of us are familiar with the principle of sawing wood, numerous discover metal a little unstable at first, which is why we have put together this guide. Our objective is to help you with both tools and strategy, which will, (in addition to some persistence and practice), start you off on the correct path to effective sawing every time.

Saw frames: A jewellers saw frame is similar in design 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 vary in size from 3 inch to 6 inch.

Sawing

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 really coarse to incredibly great. Blades are identified by the variety 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 consists of 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

Recommended gauge Of metal mm

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

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 1
0.3
19
0.7
0.8 to 1.0

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

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 8/0
0.17
30
0.3
Up to 0.4

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

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

You will not require to purchase every grade of saw blade; a basic selection of coarse, medium and fine should be completely appropriate. Guarantee you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize most frequently.

Setting up a blade into a saw:

Defining and determining: Before beginning to saw, your metal should be plainly significant 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 resemble a compass but with two points). Copy it onto tracing paper and cover the reverse with graphite as normal if you want to transfer a more complicated style onto metal. Before transferring to the metal surface, rub it over gently with Plasticine so that a sticky film is left, which will show up the pencil marks developed when you re-trace. Get rid of the tracing paper and go over the pencil lines with a scriber when you have re-traced the design onto the metal.

The drill keeps moving and wont find its position: Make sure you have marked the drilling position plainly with a small damage to assist the drill. Likewise make sure the drill is fitted properly into the chuck, it might not be directly. Above all, ensure the drill itself is totally upright.

Conserve this for later.

Piercing.

Troubleshooting:.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is used for entirely that purpose. A strong base is integrated with a movable chuck mounted on a column, which is managed by a lever at the side. The base can facilitate a clamp to hold work safely assisting to ensure an accurate outcome whenever.

The drill is getting too hot: If the drill overheats you can cool it down utilizing a small amount of water or an oil based drilling coolant. Stopping working that, merely stop and enable the tools to cool down.

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 use 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 conjunction with a drill stand to guarantee vertical drilling.

My arm is harming: Check your seating position is right and attempt to relax. Also dont be tempted to require the saw, you are just assisting it so let the blade will do the work.

Centre punch: A centre punch is also a steel marker with a sharp point similar to a scriber. It is and has a shallow pointer used in combination with a hammer to mark the position for subsequent drill holes. It is also 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 narrow and long suggestion. It is used to scribe styles onto metal and can be utilized to mark the positions for drilling.

Piercing a gain access to hole for sawing:.

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

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 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 outside in.

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

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

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a versatile 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.

Troubleshooting:.

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

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

Starting to Saw:.

Sit at your bench with your saw frame supported between your chest and the edge of the bench or the V of your bench peg. The wood manage must face you and the blade clamps should be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp completion outermost away into your frame using the wing-nut. (Do not be tempted to tighten with pliers as this compromises the screw thread).
Push carefully against the handle with your chest which will cause the frame to flex, and tighten up the second wing-nut to secure the blade.
Launch the frame and examine the stress of the blade by plucking it. (Failure to protect your blade with the right tension will result in it breaking as quickly as you start to saw).

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 been some brand-new developments in frame design over the past few years and it is now possible to purchase more advanced variations which create the tension in the saw blade for you. Rather the stress is produced via 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 packages 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 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, rather than the outdoors in.

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are utilizing is too difficult for that specific type of drill. Some drills are tougher than others so check their suitability prior to you buy.

Drill bits: The most typical type of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a range of toughened materials and range in size from 0.3 mm upwards. Drills can become blunt remarkably quickly so its suggested to buy multiples of the sizes you use most often.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw must be kept in a vertical position with the blade facing forward, and you should be seated so that your workspace is around mid-chest height.
Position the blade on the outside of your significant line and gently draw the blade down. Eliminate the saw and repeat a number of times until you have a little indent to assist the blade.
Now begin to carefully move the saw up and down keeping in mind that the blade cuts on the down movement and simply re-positions on the upward. If you are having problem getting the blade to bite you can apply some beeswax which is offered in blocks, to assist alleviate the movement.
Saw on the exterior of your significant line and attempt to keep a gentle and constant 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 just bring it back along the cutting line if that is possible.
Submit the rough edge to end up.

My saw blades keep breaking: Dont anguish this is completely typical and practise makes perfect. Examine the stress of your blade for slackness and make sure you are utilizing the proper blade size/metal mix.

Bow drill: A bow drill is a standard hand drill which can be used with one hand. It has an easy twisting mechanism which is produced with a pull/push motion utilizing a wood baton and a piece of string. It is easy to manage and is ideal for a newbie.

Once your design is scribed onto the metal, identify a position within the waste product to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the right drill size to correspond with the saw blade you mean to utilize, (please describe chart) and insert into the chuck making sure it is gripped tightly.
Drill the hole. Start slowly making sure the drill bit has actually discovered its position. As soon as in position increase the speed and push down with a gentle however continuous pressure up until all the method through..
Now, reverse your saw blade at the clamp nearest the deal with and thread the blade through the hole from the top. Once through, re-clamp your blade ensuring the tension is right.
Saw out your shape.
Remove the saw by un-clamping the blade nearest the manage again once sawing is total.
File to complete.

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

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