A Guide to Sawing & Piercing

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There have actually been some new developments in frame style over the previous couple of years and it is now possible to buy more advanced versions which create 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 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. These specific clamps can likewise be turned 45 degrees which helps with sawing into hard locations.

Sawing

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

Saw frames: A jewellers saw frame is comparable in design 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.

Saw piercing is most likely to be among the first major jobs you attempt as a jeweller. It is the primary step in the improvement of an easy sheet of metal into something completely different and holds limitless possibilities. Most of us are familiar with the principle of sawing wood, numerous find metal a little temperamental at first, which is why we have actually put together this guide. Our objective is to help you with both tools and strategy, which will, (in addition to some perseverance and practice), begin you off on the right path to successful sawing each time.

Saw blades: Blades for a jewellers piercing saw are sold in bundles of 12, or by the gross (144) and come in a choice of grades which range from extremely coarse to very great. The table listed below includes all the info you will require to select the proper blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Advised gauge Of metal mm

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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

You will not need to purchase every grade of saw blade; a fundamental choice of coarse, medium and fine need to be completely appropriate. However, guarantee you purchase more of the medium grade (2/0 or 1/0) as these are what you will use most often.

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

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
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

Setting up a blade into a saw:

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 big variety of various accessories including drill bits.

Archimedian Hand Drill: This is a small spring filled drill, which works using a manage at the top which is lowered and pulled back approximately turn the chuck at the tip. This needs both hands to use successfully.

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 force the blade.

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. There have actually been some new advancements in frame design over the previous couple of years and it is now possible to purchase more innovative variations which develop the tension in the saw blade for you. Rather the tension is created by means of 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. 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 extremely fine. By drilling a little hole you offer 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.

Piercing an access hole for sawing:.

Once your style is scribed onto the metal, determine a position within the waste material to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the right drill size to correspond with the saw blade you mean to utilize, (please describe chart) and insert into the chuck ensuring it is grasped tightly.
Drill the hole. Start gradually making certain the drill bit has found its position. As soon as in position increase the speed and lower with a gentle but continuous pressure till 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 sure the tension is proper.
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 finish.

Beginning to Saw:.

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

My saw blades keep sticking: Apply some kind of lubricant to ease the sawing movement. Some jewellers utilize spittle, however you can also utilize beeswax. Just run it along the blade and continue to saw.

Piercing.

Centre punch: A centre punch is also a steel marker with a sharp point comparable 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 automatic centre punches which do not require a hammer and rather have a push button action.

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 ought to be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your marked line and carefully draw the blade down. Remove the saw and repeat a couple of times until you have a small indent to direct the blade.
Now start 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 problem getting the blade to bite you can use some beeswax which is offered in blocks, to help reduce the movement.
Saw on the exterior of your marked line and try to maintain a gentle and steady action.
As soon as the cutting is complete, undo the clamp at the top of the saw and pull the frame down to eliminate it from the work, or simply bring it back along the cutting line if that is possible.
File the rough edge to finish.

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, simply stop and permit the tools to cool down.

Save this for later on.

My arm is harming: Check your seating position is right and try to relax. Also dont be lured to require the saw, you are merely assisting it so let the blade will do the work.

Drill bits: The most typical kind of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a variety of toughened materials and variety in size from 0.3 mm upwards. Drills can end up being blunt surprisingly quickly so its suggested to buy multiples of the sizes you use most frequently.

Rotary Hand Drill: Rotary hand drills have the motor contained within the hand piece and either run off of the power supply or can be charged up to utilize cordless. They have the exact same multi-purpose functionality of a pendant drill and can be used with a large variety of devices. Rotary hand drills can be utilized in conjunction with a drill stand to make sure vertical drilling.

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are utilizing is too hard for that particular type of drill. Some drills are harder than others so examine their suitability prior to you buy.

Why Pierce? When you require access to an area which would otherwise be impossible or difficult to reach e.g. the centre of a circle, piercing is needed. By drilling a little 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.

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 wooden manage must face you and the blade secures ought to 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 tempted to tighten with pliers as this deteriorates the screw thread).
Then push carefully versus the handle with your chest which will trigger the frame to bend, and tighten up the 2nd wing-nut to protect the blade.
Release the frame and inspect the tension of the blade by plucking it. You are looking for a distinctive ping to show the tension is correct. If you do not hear the ping simply reverse and duplicate the process again until its ideal. (Failure to protect your blade with the right tension will lead to it breaking as quickly as you begin to saw).

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

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

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

My saw blades keep breaking: Dont anguish this is perfectly normal and practise makes ideal. However, check the stress of your blade for slackness and make sure you are utilizing the appropriate blade size/metal mix.

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

Fixing:.

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 likewise susceptible to breakages if not protected properly in the chuck.

Troubleshooting:.

Tools for Piercing: There are various methods to drill a hole. You can use hand tools or mechanised tools; the principle is much the very same. When drilling a hole is to keep your drill bit upright and totally vertical, the most crucial thing to remember. This is why all drilling tools have an adjustable chuck to grip the drill bit securely, whilst keeping it fully vertical. Chucks are either fully adjustable to take all sizes of drill or interchangeable, suggesting you will need to alternate to accommodate different drill bits.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for solely that purpose. A tough base is integrated with a movable chuck installed 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 every time.

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