A Guide to Sawing & Piercing

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Another choice you need to make when buying your frame is whether you want an adjustable or a set style. An adjustable frame enables you to change the size to accommodate damaged blades where as a fixed style will only take basic size blades as they are sold.

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. Blades are kept in location by wing-nut clamps at either end of the saw which are tightened by hand. 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. A 3 inch frame is an excellent basic function size for little scale tasks, however the choice is down to individual choice.

There have actually been some new advancements in frame design over the previous few years and it is now possible to purchase more innovative versions which develop the tension in the saw blade for you. One such style is from a business called Knew Concepts who have a range of light-weight aluminium frames which do not flex. Instead the tension is created 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. These specific clamps can likewise be turned 45 degrees which facilitates sawing into tough areas.

Saw piercing is most likely to be among the first significant jobs you attempt as a jeweller. It is the primary step in the change of an easy sheet of metal into something totally different and holds endless possibilities. Although the majority of us recognize with the idea of sawing wood, lots of discover metal a little temperamental initially, which is why we have created this guide. Our aim is to help you with both tools and method, which will, (in addition to some persistence and practice), start you off on the proper course to successful sawing whenever.

Sawing

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and be available in a selection of grades which range from extremely coarse to extremely fine. Blades are characterized 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 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 need to choose the proper blade for the metal in concern:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Recommended gauge Of metal mm

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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 1/0
0.28
20.5
0.6
0.6 to 0.95

You will not require to acquire every grade of saw blade; a fundamental selection of coarse, medium and fine ought to be perfectly adequate. Ensure you purchase more of the medium grade (2/0 or 1/0) as these are what you will use most often.

Saw blade Grade 8/0
0.17
30
0.3
As much as 0.4

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

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

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

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

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

Installing a blade into a saw:

My saw blades keep breaking: Dont misery this is completely normal and practise makes perfect. Examine the stress of your blade for slackness and make sure you are utilizing the appropriate blade size/metal combination.

Starting to Saw:.

Conserve this for later on.

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

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

The drill keeps walking around and wont discover its position: Make sure you have marked the drilling position clearly with a small dent to direct the drill. Likewise make sure the drill is fitted properly into the chuck, it may not be directly. Above all, make sure the drill itself is fully upright.

Fixing:.

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 tension. There have actually been some brand-new developments in frame design over the past couple of years and it is now possible to acquire more innovative variations which produce the stress in the saw blade for you. Instead the tension is produced by means of 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 sold in packages of 12, or by the gross (144) and come in a choice of grades which vary from really coarse to incredibly fine. By drilling a small 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, rather than the outside in.

When your design is scribed onto the metal, identify a position within the waste product to drill an appropriate 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 refer to chart) and insert into the chuck ensuring it is gripped tightly.
Drill the hole. Start slowly making certain the drill bit has actually discovered its position. When in position increase the speed and push down with a continuous but mild pressure till 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. As soon as through, re-clamp your blade making certain the tension is proper.
Saw out your shape.
Remove the saw by un-clamping the blade nearest the deal with once again when sawing is total.
File to end up.

Piercing.

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 controlled by a foot pedal and can be utilized with a substantial series of various attachments consisting of 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 tip used in conjunction with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automatic centre punches which dont require a hammer and rather have a push button action.

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

Defining 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 however with two points). Copy it onto tracing paper and cover the reverse with graphite as typical if you desire to transfer a more complex style onto metal. Prior to transferring to the metal surface area, rub it over lightly with Plasticine so that a sticky film is left, which will show up the pencil marks developed when you re-trace. Eliminate the tracing paper and go over the pencil lines with a scriber as soon as you have re-traced the design onto the metal.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw needs to be held in a vertical position with the blade dealing with forward, and you need to be seated so that your working location is around mid-chest height.
Position the blade on the outside of your marked line and gently draw the blade down. Eliminate the saw and repeat a couple of times till you have a little indent to guide the blade.
Now start to gently move the saw up and down keeping in mind that the blade cuts on the down motion and simply re-positions on the upward. If you are having trouble getting the blade to bite you can use some beeswax which is sold in blocks, to assist alleviate the motion.
Saw on the exterior of your marked line and attempt to preserve a steady and gentle 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.

Sawing curves: Curves require 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.

Piercing an access hole for sawing:.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for exclusively that purpose. 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 help with a clamp to hold work securely helping to guarantee a precise result whenever.

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

Archimedian Hand Drill: This is a little spring loaded drill, which works utilizing a manage at the top which is lowered and drew back as much as turn the chuck at the suggestion. This needs both hands to utilize successfully.

My arm is hurting: Check your seating position is right and try to unwind. Do not be tempted to force the saw, you are just guiding it so let the blade will do the work.

Scriber: A scriber is a great marking tool with a long and narrow pointer. It is utilized to scribe designs onto metal and can be utilized 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 performance of a pendant drill and can be utilized with a wide variety of accessories. Rotary hand drills can be utilized in conjunction with a drill stand to ensure vertical drilling.

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 ought to face you and the blade secures need 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 tempted to tighten up with pliers as this damages the screw thread).
Push carefully against the handle with your chest which will trigger the frame to flex, and tighten up the second wing-nut to protect the blade.
Release the frame and check the tension of the blade by plucking it. You are trying to find a distinct ping to reveal the stress is appropriate. If you do not hear the ping just undo and duplicate the process again till its right. (Failure to secure your blade with the ideal tension will lead to it breaking as soon as you begin to saw).

Fixing:.

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

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

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 using is too difficult for that particular kind of drill. Some drills are harder than others so examine their suitability prior to you buy.

Why Pierce? Piercing is required when you need access to a location which would otherwise be hard or impossible to reach e.g. the centre of a circle. By drilling a small hole you provide 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.

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

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