A Guide to Sawing & Piercing

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When purchasing your frame is whether you desire an adjustable or a set design, another decision you require to make. An adjustable frame permits you to alter 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 very first major jobs you attempt as a jeweller. It is the primary step in the transformation of a simple sheet of metal into something entirely various and holds endless possibilities. Although the majority of us recognize with the concept of sawing wood, lots of discover metal a little temperamental initially, which is why we have actually created this guide. Our objective is to help you with both tools and technique, which will, (in addition to some persistence and practice), start you off on the right path to successful sawing whenever.

Sawing

There have actually been some brand-new developments in frame design over the previous few years and it is now possible to acquire advanced versions which produce the stress in the saw blade for you. One such style is from a business called Knew Concepts who have a series of lightweight aluminium frames which do not flex. Instead the stress is created by means of a cam-lever system within the blade clamp, which enables a fast release and positioning of the blade with the flick of a lever. These particular clamps can likewise be turned 45 degrees which facilitates sawing into challenging locations.

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 tension. 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 a good basic purpose size for small scale jobs, however the option is down to individual preference.

Saw blades: Blades for a jewellers piercing saw are offered in bundles of 12, or by the gross (144) and come in a selection of grades which vary from extremely coarse to incredibly fine. The table listed below consists of all the information 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

Suggested gauge Of metal mm

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

You will not require to buy every grade of saw blade; a basic choice of coarse, medium and fine must be perfectly sufficient. 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 4
0.38
15
0.8
1.0 to 1.3

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 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 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

Installing a blade into a saw:

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 kept in a vertical position with the blade dealing with forward, and you ought to be seated so that your working location is around mid-chest height.
Position the blade on the outside of your marked line and carefully draw the blade down. Remove the saw and repeat a couple of times till you have a small indent to assist the blade.
Now begin to carefully move the saw up and down bearing 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 apply some beeswax which is offered in blocks, to assist alleviate the movement.
Saw on the exterior of your significant line and attempt to preserve a mild and constant 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 complete.

My drills keep breaking: A blunt drill bit will break more quickly, as we instinctively use more pressure if it doesnt appear to be cutting. They are likewise prone to breakages if not protected correctly in the chuck.

Piercing an access hole for sawing:.

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually a suspended motor and a versatile shaft connected to a hand piece, which includes the chuck. It is controlled by a foot pedal and can be used with a big variety of various accessories consisting of drill bits.

My arm is harming: Check your seating position is correct and try to unwind. Likewise dont be tempted to require the saw, you are merely assisting it so let the blade will do the work.

Why Pierce? Piercing is required when you require access to an area which would otherwise be challenging 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, allowing you to saw from the inside out, rather than the outdoors in.

Bow drill: A bow drill is a conventional hand drill which can be utilized with one hand. It has a basic twisting system which is developed with a pull/push movement utilizing a wooden baton and a piece of string. It is easy to manage and is perfect for a newbie.

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

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

Bench Mounted Pillar Drill: This is the ultimate drilling tool and is used for entirely that purpose. A durable base is combined with a movable chuck mounted on a column, which is managed by a lever at the side. The base can facilitate a clamp to hold work securely assisting to ensure an accurate result every time.

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

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

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. Failing that, merely stop and permit the tools to cool off.

Archimedian Hand Drill: This is a little spring filled drill, which works utilizing a deal with at the top which is lowered and drew back as much as rotate the chuck at the suggestion. This requires both hands to use efficiently.

Saw frames: A jewellers saw frame is comparable in design to a little fretsaw and is made of springy steel which holds the blade in position under stress. There have been some brand-new developments in frame design over the past couple of years and it is now possible to purchase more innovative versions which develop the tension in the saw blade for you. Rather the stress is created via a cam-lever system within the blade clamp, which enables a fast 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 choice of grades which range from extremely coarse to extremely 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.

Centre punch: A centre punch is also a steel marker with a sharp point similar 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 also possible to get automated centre punches which dont require a hammer and instead have a push button action.

Rotary Hand Drill: Rotary hand drills have the motor contained within the hand piece and either run of the power supply or can be charged up to use cordless. They have the same multi-purpose functionality of a pendant drill and can be used with a large range of accessories. Rotary hand drills can be utilized in combination with a drill stand to guarantee vertical drilling.

As soon as your style is scribed onto the metal, determine a position within the waste material to drill an appropriate hole.
Mark the position with a scriber or centre punch.
Select the proper drill size to refer the saw blade you plan to utilize, (please refer to chart) and insert into the chuck making certain it is grasped firmly.
Drill the hole. Start gradually ensuring the drill bit has actually found its position. As soon as in position increase the speed and lower with a gentle however constant pressure till all the way through..
Now, reverse your saw blade at the clamp nearest the handle and thread the blade through the hole from the top. When through, re-clamp your blade making certain the stress is proper.
Saw out your shape.
As soon as sawing is total, remove the saw by un-clamping the blade nearest the handle again.
Submit to end up.

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 deal with should 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 the end furthest away into your frame utilizing the wing-nut. (Do not be lured to tighten with pliers as this weakens the screw thread).
Push gently against the manage with your chest which will cause the frame to flex, and tighten up the second wing-nut to protect the blade.
Release the frame and examine the tension of the blade by plucking it. (Failure to protect your blade with the ideal stress will result in it breaking as soon as you begin to saw).

Troubleshooting:.

Tools for Piercing: There are several methods to drill a hole. You can utilize hand tools or mechanised tools; the principle is similar. The most essential 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 totally adjustable to take all sizes of drill or interchangeable, implying you will require to alternate to accommodate different drill bits.

Beginning to Saw:.

Defining and determining: Before beginning to saw, your metal should be plainly 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 however with 2 points). If you desire to move a more complicated design onto metal, copy it onto tracing paper and cover the reverse with graphite as typical. Then before moving to the metal surface area, rub it over gently with Plasticine so that a sticky movie is left, which will reveal up the pencil marks developed when you re-trace. Once you have actually re-traced the style onto the metal, eliminate the tracing paper and review the pencil lines with a scriber.

Sawing curves: Curves require 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 force the blade.

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

Conserve this for later on.

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

Piercing.

The drill keeps walking around and will not discover its position: Make sure you have actually marked the drilling position clearly with a tiny damage to direct the drill. Likewise guarantee the drill is fitted properly into the chuck, it might not be directly. Above all, guarantee the drill itself is completely upright.

Troubleshooting:.

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