A Guide to Sawing & Piercing

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Sawing

There have actually been some new developments in frame style over the past few years and it is now possible to acquire more advanced versions which produce the tension in the saw blade for you. Rather the tension is developed 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.

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 stress. Blades are held in place by wing-nut clamps at either end of the saw which are tightened up by hand. The size of the saw is determined by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch. A 3 inch frame is an excellent general purpose size for little scale projects, however the option is down to personal choice.

When acquiring your frame is whether you desire an adjustable or a set design, another choice you require to make. An adjustable frame enables you to change the size to accommodate broken blades where as a fixed design will just take standard size blades as they are sold.

Saw piercing is likely to be among the first significant tasks you try as a jeweller. It is the very first action in the change of a simple sheet of metal into something entirely various and holds endless possibilities. Although most of us recognize with the principle of sawing wood, numerous find metal a little unstable in the beginning, which is why we have actually assembled this guide. Our objective is to help you with both tools and strategy, which will, (in addition to some patience and practice), begin you off on the appropriate path to successful sawing every time.

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 range from really coarse to incredibly fine. Blades are identified 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 need to cut it and vice versa. The table below includes all the details you will require to select the correct blade for the metal in concern:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Advised gauge Of metal mm

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

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

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 3
0.36
16
0.8
0.9 to 1.2

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

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

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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 4
0.38
15
0.8
1.0 to 1.3

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 contains the chuck. It is managed by a foot pedal and can be used with a huge variety of various attachments including drill bits.

Piercing a gain access to hole for sawing:.

Starting to Saw:.

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

Saw frames: A jewellers saw frame is comparable in style to a little fretsaw and is made of springy steel which holds the blade in position under stress. There have been some brand-new advancements in frame style over the past couple of years and it is now possible to buy more advanced variations which develop the tension in the saw blade for you. Instead the tension is produced via a cam-lever mechanism 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 sold in packages of 12, or by the gross (144) and come in a selection of grades which vary from very 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 inside out, rather than the outdoors in.

Why Pierce? When you need access to an area which would otherwise be hard or impossible 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, permitting you to saw from the within out, rather than the outdoors in.

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

Once 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 correspond with the saw blade you intend to use, (please describe chart) and insert into the chuck ensuring it is gripped firmly.
Drill the hole. Start slowly making sure the drill bit has actually discovered its position. Once in position increase the speed and push down with a gentle however continuous pressure till all the way through..
Now, reverse your saw blade at the clamp nearest the deal with and thread the blade through the hole from the top. When through, re-clamp your blade making certain the tension is right.
Saw out your shape.
Eliminate the saw by un-clamping the blade nearest the manage again when sawing is total.
Submit to finish.

Bow drill: A bow drill is a standard hand drill which can be utilized with one hand. It has a basic twisting system which is created with a pull/push motion utilizing a wooden baton and a piece of string. It is simple to control and is perfect for a novice.

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

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 facing forward, and you should be seated so that your working location is around mid-chest height.
Position the blade on the outside of your significant line and carefully draw the blade down. Get rid of the saw and repeat a number of times up until you have a small indent to assist the blade.
Now begin to gently move the saw up and down keeping in mind that the blade cuts on the down movement and simply 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 alleviate the motion.
Saw on the exterior of your marked line and attempt to maintain a gentle and consistent action.
As soon as the cutting is total, reverse 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 finish.

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 manage should face you and the blade secures must be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp the end furthest away into your frame utilizing the wing-nut. (Do not be lured to tighten with pliers as this deteriorates the screw thread).
Then push gently against the manage with your chest which will trigger the frame to flex, and tighten the second wing-nut to protect the blade.
Launch the frame and inspect the tension of the blade by plucking it. (Failure to secure your blade with the right tension will result in it breaking as quickly as you begin to saw).

Marking out and determining: Before starting to saw, your metal needs to be plainly marked 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 2 points). Copy it onto tracing paper and cover the reverse with graphite as normal if you desire to move a more complicated design onto metal. Prior to moving to the metal surface, rub it over lightly with Plasticine so that a sticky movie is left, which will show up the pencil marks developed when you re-trace. Get rid of the tracing paper and go over the pencil lines with a scriber as soon as you have actually re-traced the style onto the metal.

Sawing curves: Curves call for much shorter strokes and require an upright sawing position. You need to gently turn the saw along the curve with each cut, making sure not to require the blade.

Conserve this for later.

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

My arm is harming: Check your seating position is correct and attempt to unwind. Do not be tempted to force the saw, you are merely assisting it so let the blade will do the work.

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 performance of a pendant drill and can be used with a large variety of devices. Rotary hand drills can be used in combination with a drill stand to guarantee vertical drilling.

Archimedian Hand Drill: This is a little spring loaded drill, which works using a manage at the top which is pressed down and pulled back up to turn the chuck at the tip. This requires both hands to use efficiently.

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for entirely that function. A sturdy base is integrated with a movable chuck mounted on a column, which is managed by a lever at the side. The base can help with a clamp to hold work firmly helping to guarantee a precise outcome every time.

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

Piercing.

My saw blades keep breaking: Dont despair this is perfectly regular and practise makes ideal. Check the tension of your blade for slackness and make sure you are utilizing the appropriate blade size/metal combination.

Fixing:.

My drill isnt cutting: If the drill bit wont bite it may be because it is blunt or that the metal you are using is too difficult for that specific type of drill. Some drills are tougher than others so inspect their viability before you buy.

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

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

Drill bits: The most common 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 range in size from 0.3 mm upwards. Drills can end up being blunt surprisingly rapidly so its advisable to buy multiples of the sizes you utilize most frequently.

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

Fixing:.

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