A Guide to Sawing & Piercing

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

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 tension. 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.

Sawing

Another decision you require to make when acquiring your frame is whether you want an adjustable or a set style. An adjustable frame enables you to change the size to accommodate broken blades where as a fixed style will just take basic size blades as they are offered.

There have been some new advancements in frame style over the previous couple of years and it is now possible to purchase more sophisticated versions which produce the stress in the saw blade for you. One such style is from a company called Knew Concepts who have a variety of lightweight aluminium frames which do not flex. Instead the tension is produced through a cam-lever system within the blade clamp, which makes it possible for a quick release and positioning of the blade with the flick of a lever. These particular clamps can likewise be turned 45 degrees which assists in sawing into hard locations.

Saw blades: Blades for a jewellers piercing saw are offered in packages of 12, or by the gross (144) and be available in a selection of grades which range from extremely coarse to incredibly great. Blades are defined by the number of teeth per cm so for example 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 require to suffice and vice versa. The table listed below includes all the details you will require to select the appropriate 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 2/0
0.26
22
0.55
0.6 to 0.8

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

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

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

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 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

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

Setting up a blade into a saw:

The drill is getting too hot: If the drill overheats you can cool it down utilizing a percentage of water or an oil based drilling coolant. Failing that, simply stop and allow the tools to cool down.

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

My drills keep breaking: A blunt drill bit will break more quickly, as we instinctively use more pressure if it doesnt appear to be cutting. They are also susceptible to breakages if not secured correctly 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 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 using the wing-nut. (Do not be lured to tighten with pliers as this compromises the screw thread).
Push gently against the handle with your chest which will trigger the frame to bend, 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 secure your blade with the best tension will result in it breaking as quickly as you start to saw).

Starting to Saw:.

Troubleshooting:.

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 totally adjustable to take all sizes of drill or interchangeable, implying you will need to alternate to accommodate different drill bits.

Drill bits: The most common type of drill bits are twist drills which cut when rotated in a clockwise instructions. They are made from a variety of toughened materials and variety in size from 0.3 mm upwards. Drills can end up being blunt remarkably rapidly so its advisable to buy multiples of the sizes you use most often.

Seat yourself at the bench and hold the operate in position on the bench peg, holding the saw in your opposite hand.
Your saw should be held in a vertical position with the blade facing forward, and you should be seated so that your working location is around mid-chest height.
Position the blade on the exterior of your significant line and gently draw the blade down. Get rid of the saw and repeat a couple of times till you have a small indent to guide the blade.
Now begin to carefully move the saw up and down keeping in mind that the blade cuts on the downward motion and just re-positions on the upward. If you are having difficulty getting the blade to bite you can use some beeswax which is offered in blocks, to assist relieve the movement.
Saw on the outside of your significant line and try to preserve a consistent and mild action.
Once the cutting is total, reverse the clamp at the top of the saw and pull the frame down to remove it from the work, or merely bring it back along the cutting line if that is possible.
File the rough edge to finish.

My saw blades keep breaking: Dont misery this is perfectly normal and practise makes ideal. Examine the tension of your blade for slackness and make sure you are using the correct blade size/metal combination.

My arm is injuring: Check your seating position is appropriate and try to relax. Likewise dont be tempted to require the saw, you are simply assisting it so let the blade will do the work.

Sawing curves: Curves require much shorter strokes and require an upright sawing position. You require to gently turn the saw along the curve with each cut, taking care not to force the blade.

Saw frames: A jewellers saw frame is similar 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 design over the past couple of years and it is now possible to buy more sophisticated variations which develop the tension in the saw blade for you. Rather 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. Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and come in a selection of grades which range 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 outdoors in.

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

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

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

Piercing.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is used for solely that purpose. A sturdy base is combined with a movable chuck mounted on a column, which is controlled by a lever at the side. The base can facilitate a clamp to hold work firmly assisting to ensure an exact result whenever.

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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 utilize cordless. They have the very same multi-purpose performance of a pendant drill and can be utilized with a vast array of devices. Rotary hand drills can be utilized in conjunction with a drill stand to ensure vertical drilling.

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.

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

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are using is too tough for that specific kind of drill. Some drills are harder than others so examine their suitability before you buy.

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has a suspended motor and a flexible shaft connected to a hand piece, which consists of the chuck. It is controlled by a foot pedal and can be used with a huge series of various accessories including drill bits.

Piercing an access hole for sawing:.

Once your style 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 plan to use, (please describe chart) and insert into the chuck ensuring it is grasped securely.
Drill the hole. Start gradually making certain the drill bit has discovered its position. As soon as in position increase the speed and push down with a continuous however mild pressure until 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. When through, re-clamp your blade ensuring the stress is right.
Saw out your shape.
Once sawing is total, get rid of the saw by un-clamping the blade nearest the handle once again.
Submit to complete.

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

Fixing:.

Marking out and determining: Before starting to saw, your metal must be clearly marked and measured 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).

Archimedian Hand Drill: This is a small spring packed drill, which works using a manage at the top which is lowered and drew back as much as rotate the chuck at the suggestion. This requires both hands to utilize successfully.

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