A Guide to Sawing & Piercing

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Most of us are familiar with the concept of sawing wood, numerous find metal a little temperamental at initially, which is why we have actually put together this guide. Our aim is to assist you with both tools and method, which will, (in addition to some perseverance and practice), start you off on the appropriate path to effective sawing every time.

Another decision you require to make when acquiring your frame is whether you desire an adjustable or a set style. An adjustable frame enables you to alter the size to accommodate broken blades where as a set design will only take basic size blades as they are sold.

Sawing

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 stress. 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.

There have been some new developments in frame style over the previous few years and it is now possible to buy more innovative versions which create the tension in the saw blade for you. One such design is from a business called Knew Concepts who have a variety of lightweight aluminium frames which do not flex. Instead the stress is created through a cam-lever system 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 facilitates sawing into challenging locations.

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 incredibly great. The table listed below contains all the info you will require to choose the correct blade for the metal in concern:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Suggested gauge Of metal mm

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

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

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

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

You will not need to buy every grade of saw blade; a basic selection of coarse, medium and fine should be completely adequate. Ensure you buy more of the medium grade (2/0 or 1/0) as these are what you will use most often.

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

Saw blade Grade 8/0
0.17
30
0.3
Up to 0.4

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 1
0.3
19
0.7
0.8 to 1.0

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

Setting up a blade into a saw:

Drill bits: The most common type of drill bits are twist drills which cut when turned in a clockwise instructions. They are made from a range of toughened materials 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 regularly.

My drill isnt cutting: If the drill bit will not bite it might be due to the fact that it is blunt or that the metal you are using is too tough for that particular type of drill. Some drills are tougher than others so inspect their suitability prior to you buy.

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

Piercing a gain access to hole for sawing:.

Why Pierce? When you require access to a location which would otherwise be challenging or impossible to reach e.g. the centre of a circle, piercing is required. By drilling a little hole you provide 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, instead of the outdoors in.

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 working area is around mid-chest height.
Position the blade on the outside of your significant line and gently draw the blade down. Get rid of the saw and repeat a number of times up until you have a small indent to direct the blade.
Now begin to carefully move the saw up and down keeping in mind that the blade cuts on the down motion and just re-positions on the upward. If you are having difficulty getting the blade to bite you can apply some beeswax which is offered in blocks, to help ease the motion.
Saw on the outside of your significant line and try to preserve a gentle and steady action.
As soon as the cutting is complete, reverse 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.
Submit the rough edge to end up.

Saw frames: A jewellers saw frame is comparable in style to a small fretsaw and is made of springy steel which holds the blade in position under stress. There have actually been some brand-new developments in frame style over the previous few years and it is now possible to buy more advanced versions which create the stress in the saw blade for you. Rather the tension is produced 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 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 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, allowing you to saw from the within out, rather than the outside in.

My saw blades keep breaking: Dont despair this is completely typical and practise makes ideal. Check the stress of your blade for slackness and make sure you are utilizing the right blade size/metal combination.

Bow drill: A bow drill is a traditional hand drill which can be used with one hand. It has a basic twisting mechanism which is developed with a pull/push motion using a wood baton and a piece of string. It is simple to manage and is perfect for a novice.

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.

Beginning to Saw:.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for entirely that purpose. A tough 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 firmly helping to make sure a precise result each time.

Conserve this for later.

Piercing.

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

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

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

Centre punch: A centre punch is also a steel marker with a sharp point comparable to a scriber. It has a shallow pointer 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 instead have a push button action.

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 handle should face you and the blade clamps ought 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 utilizing the wing-nut. (Do not be lured to tighten with pliers as this weakens the screw thread).
Then push gently versus the handle with your chest which will trigger 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 trying to find a distinctive ping to show the tension is right. If you dont hear the ping simply reverse and repeat the procedure again up until its ideal. (Failure to secure your blade with the ideal stress will lead to it breaking as soon as you begin to saw).

When 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 right drill size to correspond with the saw blade you intend to utilize, (please describe chart) and insert into the chuck making sure it is grasped firmly.
Drill the hole. Start slowly making certain the drill bit has found its position. Once in position increase the speed and push down with a mild however continuous 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. Once through, re-clamp your blade making certain the tension is appropriate.
Saw out your shape.
Remove the saw by un-clamping the blade nearest the deal with once again once sawing is total.
File to end up.

Marking out and determining: Before beginning to saw, your metal must be plainly significant and determined so you have a guide to work to. Lines can be scribed onto metal utilizing a scriber or a set of dividers (which are similar to a compass but with two points). Copy it onto tracing paper and cover the reverse with graphite as regular if you want to transfer a more complex style onto metal. Then before moving to the metal surface, rub it over lightly with Plasticine so that a sticky film is left, which will appear the pencil marks developed when you re-trace. Remove 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.

My arm is harming: Check your seating position is right and try to unwind. Also do not be lured to require the saw, you are merely directing it so let the blade will do the work.

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

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

Fixing:.

Sawing straight lines: Straight lines are best tackled with the saw tilted a little forward using long, smooth strokes.

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

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

Rotary Hand Drill: Rotary hand drills have the motor included 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 functionality of a pendant drill and can be utilized with a large range of devices. Rotary hand drills can be used in combination with a drill stand to make sure vertical drilling.

Repairing:.

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