A Guide to Sawing & Piercing

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Most of us are familiar with the principle 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 patience and practice), begin you off on the appropriate course to effective sawing every time.

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 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 an excellent basic purpose size for little scale jobs, but the option is down to personal choice.

There have been some brand-new developments in frame style over the past few years and it is now possible to buy advanced versions which develop the tension 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 created via a cam-lever mechanism within the blade clamp, which allows a quick release and positioning of the blade with the flick of a lever. These particular clamps can likewise be turned 45 degrees which helps with sawing into challenging locations.

Sawing

Another decision you require to make when acquiring your frame is whether you want an adjustable or a set style. An adjustable frame allows you to modify the size to accommodate broken blades where as a set design will just take basic size blades as they are offered.

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 really coarse to extremely fine. The table listed below contains all the details you will need to pick the appropriate blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Suggested gauge Of metal mm

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

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 3/0
0.24
23.5
0.5
0.6 to 0.7

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

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

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

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

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

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

Installing a blade into a saw:

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 contains the chuck. It is controlled by a foot pedal and can be used with a substantial variety of various attachments consisting of drill bits.

Once your style is scribed onto the metal, determine a position within the waste product to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the appropriate drill size to correspond with the saw blade you intend to utilize, (please describe chart) and insert into the chuck ensuring it is grasped securely.
Drill the hole. Start slowly making certain the drill bit has actually found its position. As soon as in position increase the speed and press down with a gentle but constant pressure till all the method through..
Now, reverse 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 certain the tension is right.
Saw out your shape.
Once sawing is total, remove the saw by un-clamping the blade nearest the deal with once again.
Submit to finish.

Marking out and measuring: 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 similar to a compass but with two points).

Piercing.

Why Pierce? When you need access to a location which would otherwise be challenging or difficult to reach e.g. the centre of a circle, piercing is needed. By drilling a small hole you provide 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.

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

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 utilize cordless. They have the very same multi-purpose functionality of a pendant drill and can be utilized with a broad range of accessories. Rotary hand drills can be used in conjunction with a drill stand to guarantee vertical drilling.

Starting to Saw:.

My arm is injuring: Check your seating position is right and attempt to relax. Dont be tempted to require the saw, you are just assisting it so let the blade will do the work.

The drill is getting too hot: If the drill overheats you can cool it down utilizing a little amount of water or an oil based drilling coolant. Failing that, merely stop and permit the tools to cool down.

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

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

Piercing a gain access to hole for sawing:.

Save this for later.

Sawing straight lines: Straight lines are best taken on with the saw tilted somewhat forward using long, smooth strokes.

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 particular kind of drill. Some drills are harder than others so check their suitability prior to you buy.

My saw blades keep breaking: Dont misery this is completely regular and practise makes perfect. Nevertheless, examine the stress of your blade for slackness and make sure you are utilizing the correct blade size/metal combination.

Tools for Piercing: There are several methods to drill a hole. You can use hand tools or mechanised tools; the concept is much the very same. When drilling a hole is to keep your drill bit upright and entirely vertical, the most important thing to keep in mind. 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 require to alternate to accommodate different drill bits.

Fixing:.

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

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 tension. There have been some brand-new developments in frame design over the previous couple of years and it is now possible to buy more innovative versions which develop the stress 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 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 extremely coarse to incredibly great. By drilling a little 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.

The drill keeps moving and wont discover its position: Make sure you have actually marked the drilling position clearly with a small dent to guide the drill. Guarantee the drill is fitted properly into the chuck, it may not be directly. Above all, ensure the drill itself is fully upright.

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 deal with need to 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 secure completion outermost away into your frame using the wing-nut. (Do not be tempted to tighten up with pliers as this compromises the screw thread).
Then push gently against the handle with your chest which will trigger the frame to bend, and tighten up the 2nd wing-nut to secure the blade.
Release the frame and examine the tension of the blade by plucking it. (Failure to protect your blade with the best tension will result in it breaking as quickly as you start to saw).

Fixing:.

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

Drill bits: The most typical kind of drill bits are twist drills which cut when turned in a clockwise direction. They are made from a range of toughened products and range in size from 0.3 mm upwards. Drills can become blunt remarkably quickly so its advisable to buy multiples of the sizes you utilize most frequently.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for entirely that function. A durable base is combined with a movable chuck installed on a column, which is managed by a lever at the side. The base can assist in a clamp to hold work firmly helping to ensure a precise result each time.

Centre punch: A centre punch is also a steel marker with a sharp point comparable to a scriber. It is and has a shallow tip 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.

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 held in a vertical position with the blade facing forward, and you should be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your marked line and gently draw the blade down. Get rid of the saw and repeat a number of times until you have a little indent to direct the blade.
Now start to gently move the saw up and down keeping in mind that the blade cuts on the down 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 help ease the movement.
Saw on the exterior of your marked line and try to preserve a constant and mild action.
Once the cutting is total, reverse the clamp at the top of the saw and pull the frame down to eliminate it from the work, or just bring it back along the cutting line if that is possible.
File the rough edge to complete.

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

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