A Guide to Sawing & Piercing

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Saw frames: A jewellers saw frame is comparable in design to a small fretsaw and is made from springy steel which holds the blade in position under stress. Blades are kept in place by wing-nut clamps at either end of the saw which are tightened by hand. 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. A 3 inch frame is an excellent basic function size for small scale jobs, but the choice is down to individual choice.

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

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

Sawing

There have been some brand-new developments in frame design over the previous couple of years and it is now possible to buy more innovative versions which develop the tension in the saw blade for you. Rather the tension is created 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 very coarse to incredibly great. The table below contains all the info you will require to select the correct 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 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 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

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

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
Approximately 0.4

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

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

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

Installing a blade into a saw:

My drills keep breaking: A blunt drill bit will break more quickly, as we instinctively use more pressure if it does not seem cutting. They are also susceptible to damages if not protected properly in the chuck.

Bow drill: A bow drill is a conventional hand drill which can be utilized with one hand. It has an easy twisting system which is developed with a pull/push movement using a wooden baton and a piece of string. It is simple to manage and is perfect for a novice.

Seat yourself at the bench and hold the operate 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 must 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. Eliminate the saw and repeat a couple of times up until you have a small indent to direct the blade.
Now begin to gently move the saw up and down keeping in mind that the blade cuts on the downward motion and merely 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 reduce the movement.
Saw on the exterior of your marked line and try to preserve a steady and gentle action.
As soon as the cutting is total, undo the clamp at the top of the saw and pull the frame to eliminate it from the work, or merely bring it back along the cutting line if that is possible.
File the rough edge to end up.

Conserve this for later on.

Repairing:.

Why Pierce? Piercing is needed when you require access to a location which would otherwise be challenging or difficult to reach e.g. the centre of a circle. By drilling a small hole you supply 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 outside in.

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

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

My saw blades keep sticking: Apply some kind of lube to reduce the sawing movement. Some jewellers utilize spittle, but you can also utilize beeswax. Simply run it along the blade and continue to saw.

Rotary Hand Drill: Rotary hand drills have the motor included 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 used with a wide range of devices. Rotary hand drills can be utilized in conjunction with a drill stand to ensure vertical drilling.

My arm is injuring: Check your seating position is appropriate and try to unwind. Do not be lured to force the saw, you are merely assisting it so let the blade will do the work.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for exclusively that function. A sturdy 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 assisting to make sure a precise result whenever.

Archimedian Hand Drill: This is a little spring packed drill, which works utilizing a deal with at the top which is lowered and pulled back up to rotate the chuck at the suggestion. This requires both hands to utilize effectively.

Piercing an access hole for sawing:.

Starting to Saw:.

Centre punch: A centre punch is also a steel marker with a sharp point similar to a scriber. It is and has a shallow suggestion used in conjunction with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automated centre punches which do not require a hammer and instead have a push button action.

Fixing:.

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. Stopping working that, merely stop and allow the tools to cool down.

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. There have actually been some brand-new advancements in frame design over the past few years and it is now possible to buy more sophisticated versions which develop the stress in the saw blade for you. Instead the stress is developed through a cam-lever system within the blade clamp, which enables 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 packages of 12, or by the gross (144) and come in a selection of grades which vary from very coarse to exceptionally fine. 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 inside out, rather than the outdoors in.

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 tough for that particular type of drill. Some drills are harder than others so check their suitability before you buy.

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

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

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a flexible shaft connected to a hand piece, which includes the chuck. It is managed by a foot pedal and can be utilized with a substantial variety of different accessories including drill bits.

Drill bits: The most common kind of drill bits are twist drills which cut when rotated in a clockwise instructions. They are made from a range of toughened materials and variety 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.

As soon as your style is scribed onto the metal, determine a position within the waste product to drill an appropriate hole.
Mark the position with a scriber or centre punch.
Select the correct drill size to refer the saw blade you intend to use, (please refer to chart) and insert into the chuck ensuring it is gripped firmly.
Drill the hole. Start gradually making certain the drill bit has actually discovered its position. As soon as in position increase the speed and lower with a mild but constant pressure 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. As soon as through, re-clamp your blade making sure the stress is proper.
Saw out your shape.
Once sawing is complete, remove the saw by un-clamping the blade nearest the deal with once again.
File to complete.

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 manage ought to 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 the end outermost away into your frame using the wing-nut. (Do not be lured to tighten with pliers as this weakens the screw thread).
Then push carefully versus the manage with your chest which will cause the frame to flex, and tighten the second wing-nut to protect the blade.
Launch the frame and examine the stress of the blade by plucking it. (Failure to secure your blade with the ideal stress will result in it breaking as quickly as you start to saw).

My saw blades keep breaking: Dont anguish this is completely typical and practise makes best. Check the stress of your blade for slackness and make sure you are using the correct blade size/metal combination.

Piercing.

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, taking care not to require the blade.

Marking out and measuring: Before starting to saw, your metal must 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 are similar to a compass however with two points).

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