A Guide to Sawing & Piercing

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Another choice you need to make when buying your frame is whether you desire an adjustable or a set design. An adjustable frame permits you to modify the size to accommodate broken blades where as a fixed style will just take basic size blades as they are offered.

Sawing

There have actually been some brand-new developments in frame design over the previous couple of years and it is now possible to purchase more innovative versions which create the stress in the saw blade for you. One such design is from a business called Knew Concepts who have a variety of light-weight aluminium frames which do not flex. Instead the stress is produced via 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. These particular clamps can also be turned 45 degrees which helps with sawing into tough locations.

Saw frames: A jewellers saw frame is comparable in style to a small fretsaw and is made from springy steel which holds the blade in position under tension. Blades are held in location 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 great basic function size for small scale tasks, however the option is down to personal preference.

Saw piercing is likely to be among the very first major jobs you try as a jeweller. It is the first action in the change of a simple sheet of metal into something totally various and holds endless possibilities. Many of us are familiar with the concept of sawing wood, numerous discover metal a little unstable at first, which is why we have actually put together this guide. Our goal is to assist you with both tools and strategy, which will, (in addition to some perseverance and practice), start you off on the correct path to effective sawing whenever.

Saw blades: Blades for a jewellers piercing saw are offered in packages of 12, or by the gross (144) and be available in a selection of grades which vary from extremely coarse to extremely great. 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 guideline, the thicker the metal, the coarser the blade you will need to cut it and vice versa. The table below includes all the information you will require to pick the right 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 8/0
0.17
30
0.3
Approximately 0.4

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
0.34
17.5
0.7
0.9 to 1.1

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

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

You will not need to acquire every grade of saw blade; a basic selection of coarse, medium and fine need to be perfectly appropriate. Nevertheless, 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 1
0.3
19
0.7
0.8 to 1.0

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

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

Setting up a blade into a saw:

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

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

My saw blades keep breaking: Dont despair this is perfectly typical and practise makes ideal. Nevertheless, check the stress of your blade for slackness and make certain you are utilizing the proper blade size/metal mix.

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 clamps 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 up with pliers as this damages the screw thread).
Then push carefully against the manage with your chest which will cause the frame to flex, and tighten up the 2nd wing-nut to protect the blade.
Release the frame and examine the tension of the blade by plucking it. You are trying to find a distinctive ping to show the tension is proper. If you dont hear the ping just undo and repeat the process once again up until its best. (Failure to protect your blade with the ideal stress will result in it breaking as quickly as you start to saw).

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

Seat yourself at the bench and hold the operate in position on the bench peg, holding the saw in your opposite hand.
Your saw should be kept in a vertical position with the blade dealing with forward, and you should be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your significant line and gently draw the blade down. Get rid of the saw and repeat a couple of times till you have a small indent to direct the blade.
Now begin to gently move the saw up and down bearing in mind that the blade cuts on the downward motion and simply 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 assist relieve the movement.
Saw on the exterior of your significant line and try to preserve a steady and gentle action.
As soon as the cutting is total, undo the clamp at the top of the saw and pull the frame to remove it from the work, or merely bring it back along the cutting line if that is possible.
Submit the rough edge to complete.

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 utilized with a substantial variety of various accessories consisting of drill bits.

Centre punch: A centre punch is also a steel marker with a sharp point similar to a scriber. It has a shallow idea and is utilized in combination 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 instead 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, simply stop and enable the tools to cool off.

Repairing:.

Piercing an access hole for sawing:.

Marking out and measuring: Before starting to saw, your metal should be plainly 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 but with two points).

Troubleshooting:.

As soon as your style 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 proper drill size to correspond with the saw blade you intend to use, (please refer to chart) and insert into the chuck making certain it is grasped tightly.
Drill the hole. Start slowly making sure the drill bit has discovered its position. As soon as in position increase the speed and lower with a continuous but mild pressure till all the way 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 certain the tension is appropriate.
Saw out your shape.
As soon as sawing is complete, eliminate the saw by un-clamping the blade nearest the manage again.
Submit to complete.

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. There have actually been some brand-new advancements in frame design over the past couple of years and it is now possible to buy more sophisticated versions which develop the tension in the saw blade for you. Instead the stress is produced via a cam-lever mechanism 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 bundles of 12, or by the gross (144) and come in a selection of grades which vary from really coarse to exceptionally 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, permitting you to saw from the within out, rather than the outdoors in.

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 specific kind of drill. Some drills are tougher than others so inspect their suitability prior to you purchase.

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

Tools for Piercing: There are many various methods to drill a hole. You can use hand tools or mechanised tools; the principle is similar. When drilling a hole is to keep your drill bit upright and completely vertical, the most important thing to remember. 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, indicating you will require to alternate to accommodate various drill bits.

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

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

The drill keeps walking around and will not find its position: Make sure you have marked the drilling position clearly with a small dent to assist the drill. Also guarantee the drill is fitted properly into the chuck, it may not be directly. Above all, ensure the drill itself is completely upright.

Drill bits: The most common type of drill bits are twist drills which cut when turned in a clockwise instructions. They are made from a range of toughened products 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 utilize most regularly.

Beginning to Saw:.

Why Pierce? Piercing is required when you need 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 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, instead of the outdoors in.

Rotary Hand Drill: Rotary hand drills have the motor consisted of within the hand piece and either run off of the power supply or can be charged up to utilize cordless. They have the very same multi-purpose functionality of a pendant drill and can be used with a broad range of accessories. Rotary hand drills can be used in combination with a drill stand to ensure vertical drilling.

Archimedian Hand Drill: This is a small spring loaded drill, which works utilizing a handle at the top which is lowered and pulled back approximately rotate the chuck at the idea. This requires both hands to utilize successfully.

Save 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 developed with a pull/push motion utilizing a wooden baton and a piece of string. It is easy to control and is ideal for a newbie.

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

Piercing.

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