A Guide to Sawing & Piercing

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There have actually been some brand-new advancements in frame design over the previous few years and it is now possible to purchase more sophisticated versions which create the tension in the saw blade for you. Instead the stress is developed by means of a cam-lever system within the blade clamp, which makes it possible for a fast release and positioning of the blade with the flick of a lever.

Sawing

When acquiring your frame is whether you want an adjustable or a set style, another decision you need to make. An adjustable frame permits you to modify the size to accommodate damaged blades where as a set design will only take standard size blades as they are sold.

Most of us are familiar with the concept of sawing wood, lots of discover metal a little unstable at first, which is why we have actually put together this guide. Our objective is to help you with both tools and method, which will, (in addition to some persistence and practice), begin you off on the proper path to successful sawing every time.

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 stress. 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.

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 choice of grades which vary from really coarse to incredibly great. 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 guideline, the thicker the metal, the coarser the blade you will require to suffice and vice versa. The table listed below consists of all the info 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

Advised gauge Of metal mm

You will not require to buy every grade of saw blade; a fundamental choice of coarse, medium and fine need to be perfectly appropriate. Ensure you buy more of the medium grade (2/0 or 1/0) as these are what you will use most typically.

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 2/0
0.26
22
0.55
0.6 to 0.8

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

Saw blade Grade 8/0
0.17
30
0.3
Approximately 0.4

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

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

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 2
0.34
17.5
0.7
0.9 to 1.1

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

Setting up a blade into a saw:

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

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 range of toughened materials and range in size from 0.3 mm upwards. Drills can end up being blunt remarkably quickly so its suggested to purchase multiples of the sizes you use most frequently.

Bow drill: A bow drill is a conventional hand drill which can be used with one hand. It has an easy twisting mechanism which is created with a pull/push movement utilizing a wooden baton and a piece of string. It is easy to manage and is ideal for a novice.

Archimedian Hand Drill: This is a small spring loaded drill, which works utilizing a manage at the top which is pushed down and drew back as much as rotate the chuck at the idea. This needs both hands to utilize effectively.

The drill keeps moving around and wont find its position: Make sure you have actually marked the drilling position plainly with a tiny 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 totally upright.

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

My arm is hurting: Check your seating position is correct and attempt to relax. Do not be lured to force the saw, you are simply directing it so let the blade will do the work.

Marking out and determining: Before beginning to saw, your metal must 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 are comparable to a compass but with two points).

When your style is scribed onto the metal, identify a position within the waste material 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 mean to use, (please refer to chart) and insert into the chuck ensuring it is grasped tightly.
Drill the hole. Start gradually making certain the drill bit has discovered its position. As soon as in position increase the speed and press down with a mild however constant pressure up 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. Once through, re-clamp your blade making sure the stress is right.
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.

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 need to be seated so that your working area is around mid-chest height.
Position the blade on the exterior of your marked 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 guide 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 apply some beeswax which is offered in blocks, to help relieve the movement.
Saw on the exterior of your significant line and try to preserve a consistent and mild action.
When the cutting is total, 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 finish.

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 vast array of accessories. Rotary hand drills can be used in conjunction with a drill stand to ensure vertical drilling.

Why Pierce? Piercing is needed when you require access to an area which would otherwise be hard or difficult to reach e.g. the centre of a circle. 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 outside in.

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

Piercing.

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

Piercing a gain access to hole for sawing:.

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 tough for that particular type of drill. Some drills are harder than others so inspect their suitability prior to you buy.

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 big variety of various attachments including drill bits.

My saw blades keep sticking: Apply some type of lube to relieve the sawing motion. Some jewellers use spittle, however you can also utilize beeswax. Simply run it along the blade and continue to saw.

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 wooden manage need 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 furthest away into your frame using the wing-nut. (Do not be tempted to tighten up with pliers as this damages the screw thread).
Then push gently against the manage with your chest which will cause the frame to bend, and tighten the second wing-nut to protect the blade.
Release the frame and examine the tension of the blade by plucking it. You are trying to find an unique ping to show the stress is appropriate. If you dont hear the ping merely reverse and repeat the procedure again up until its right. (Failure to protect your blade with the ideal tension will result in it breaking as quickly as you start to saw).

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

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for solely that function. A sturdy base is integrated with a movable chuck installed on a column, which is managed by a lever at the side. The base can help with a clamp to hold work securely assisting to ensure an exact result whenever.

Repairing:.

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

Troubleshooting:.

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

Saw frames: A jewellers saw frame is similar in design to a small fretsaw and is made of springy steel which holds the blade in position under tension. There have actually been some new developments in frame style over the previous couple of years and it is now possible to acquire more advanced variations which develop the tension in the saw blade for you. Instead the stress is created by means of a cam-lever system within the blade clamp, which allows 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 bundles 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 little 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, rather than the outside in.

Starting to Saw:.

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 permit the tools to cool down.

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