A Guide to Sawing & Piercing

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Another choice you need to make when purchasing your frame is whether you want an adjustable or a fixed design. An adjustable frame allows you to modify the size to accommodate damaged blades where as a set style will just take basic size blades as they are sold.

There have been some new advancements in frame design over the past few years and it is now possible to acquire more advanced variations which develop the stress in the saw blade for you. Instead the tension is created via a cam-lever system within the blade clamp, which allows a quick release and positioning of the blade with the flick of a lever.

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 dictated by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch.

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

Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and can be found in a selection of grades which range from really coarse to very fine. Blades are defined by the number 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 guideline, the thicker the metal, the coarser the blade you will need to suffice and vice versa. The table below consists of all the info you will require to pick the appropriate blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Recommended gauge Of metal mm

You will not require to acquire every grade of saw blade; a standard selection of coarse, medium and fine must be perfectly sufficient. However, 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 2/0
0.26
22
0.55
0.6 to 0.8

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

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
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 3
0.36
16
0.8
0.9 to 1.2

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 3/0
0.24
23.5
0.5
0.6 to 0.7

Installing a blade into a saw:

As soon as your design is scribed onto the metal, determine a position within the waste product to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the proper drill size to refer the saw blade you plan to use, (please describe chart) and insert into the chuck making sure it is grasped tightly.
Drill the hole. Start slowly ensuring the drill bit has found its position. As soon as in position increase the speed and lower with a gentle but continuous pressure 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. When through, re-clamp your blade making certain the tension is proper.
Saw out your shape.
Eliminate the saw by un-clamping the blade nearest the manage again as soon as sawing is complete.
File to complete.

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, just stop and enable the tools to cool down.

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 needed. By drilling a small hole you supply 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 outdoors in.

Drill bits: The most common kind of drill bits are twist drills which cut when turned in a clockwise instructions. 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 use most regularly.

My arm is injuring: Check your seating position is correct and try to relax. Likewise dont be tempted to force the saw, you are just directing it so let the blade will do the work.

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 kept in a vertical position with the blade dealing with 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 till you have a small indent to assist the blade.
Now start to carefully move the saw up and down bearing in mind that the blade cuts on the downward movement and merely re-positions on the upward. If you are having problem getting the blade to bite you can apply some beeswax which is sold in blocks, to assist ease the movement.
Saw on the exterior of your marked line and attempt to preserve a mild and consistent action.
When the cutting is complete, 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.
Submit the rough edge to end up.

Conserve this for later.

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 stress. There have been some new advancements in frame design over the past couple of years and it is now possible to buy more advanced variations which create the stress in the saw blade for you. Rather the stress is developed by means of a cam-lever mechanism within the blade clamp, which makes it possible for 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 vary from extremely coarse to incredibly 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 within out, rather than the outside in.

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 used with a substantial range of various attachments including drill bits.

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

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

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

Troubleshooting:.

Fixing:.

Marking out and measuring: Before starting to saw, your metal should be clearly significant 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 resemble a compass however with two points). If you wish to move a more intricate style onto metal, copy it onto tracing paper and cover the reverse with graphite as normal. Before transferring to the metal surface area, rub it over lightly with Plasticine so that a sticky movie is left, which will reveal up the pencil marks developed when you re-trace. Remove the tracing paper and go over the pencil lines with a scriber when you have re-traced the style onto the metal.

Tools for Piercing: There are numerous different methods to drill a hole. You can use hand tools or mechanised tools; the principle is similar. The most essential thing to bear in mind when drilling a hole is to keep your drill bit entirely vertical and upright. This is why all drilling tools have an adjustable chuck to grip the drill bit firmly, whilst keeping it totally vertical. Chucks are either completely adjustable to take all sizes of drill or interchangeable, indicating you will require to alternate to accommodate various drill bits.

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 must face you and the blade secures should be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp the end outermost away into your frame utilizing the wing-nut. (Do not be lured to tighten up with pliers as this damages the screw thread).
Then push gently versus the manage with your chest which will cause the frame to bend, and tighten the 2nd wing-nut to protect the blade.
Launch the frame and check the stress of the blade by plucking it. You are trying to find a distinct ping to show the stress is right. If you do not hear the ping just reverse and repeat the procedure once again till its ideal. (Failure to protect your blade with the ideal stress will lead to it breaking as quickly as you begin to saw).

Beginning to Saw:.

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

Bow drill: A bow drill is a standard hand drill which can be used with one hand. It has a simple twisting mechanism which is created with a pull/push motion utilizing a wooden baton and a piece of string. It is simple to manage and is ideal for a beginner.

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 force the blade.

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

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

Piercing an access hole for sawing:.

My drill isnt cutting: If the drill bit wont bite it might be due to the fact that it is blunt or that the metal you are using is too tough for that specific type of drill. Some drills are tougher than others so examine their suitability prior to you buy.

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

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 exact same multi-purpose performance of a pendant drill and can be used with a wide variety of accessories. Rotary hand drills can be utilized in combination with a drill stand to ensure vertical drilling.

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 controlled by a lever at the side. The base can facilitate a clamp to hold work safely assisting to guarantee a precise result whenever.

The drill keeps moving around and will not find its position: Make sure you have marked the drilling position plainly with a tiny dent to guide the drill. Ensure the drill is fitted properly into the chuck, it might not be directly. Above all, make sure the drill itself is completely upright.

Piercing.

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