A Guide to Sawing & Piercing

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There have been some new developments in frame style over the past few years and it is now possible to purchase more innovative variations which create the stress in the saw blade for you. One such style is from a company called Knew Concepts who have a series of light-weight aluminium frames which do not flex. Rather the stress is developed through a cam-lever system within the blade clamp, which enables a quick 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 hard areas.

Sawing

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

When acquiring your frame is whether you want an adjustable or a fixed style, another choice you require to make. An adjustable frame permits you to modify the size to accommodate broken blades where as a set style will just take basic size blades as they are sold.

Saw frames: A jewellers saw frame is similar in design to a little fretsaw and is made of springy steel which holds the blade in position under stress. The size of the saw is determined 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 sold in bundles of 12, or by the gross (144) and come in a selection of grades which range from really coarse to exceptionally fine. The table below contains all the details you will require to choose the correct blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Suggested gauge Of metal mm

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

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 1/0
0.28
20.5
0.6
0.6 to 0.95

Saw blade Grade 8/0
0.17
30
0.3
Approximately 0.4

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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

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

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

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

Setting up a blade into a saw:

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

Once your design is scribed onto the metal, recognize a position within the waste product 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 plan to utilize, (please refer to chart) and insert into the chuck making certain it is gripped securely.
Drill the hole. Start gradually making certain the drill bit has actually found its position. When in position increase the speed and press down with a constant but mild pressure up until 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. Once through, re-clamp your blade ensuring the stress is appropriate.
Saw out your shape.
As soon as sawing is total, remove the saw by un-clamping the blade nearest the manage once again.
Submit to complete.

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

The most essential thing to keep in mind when drilling a hole is to keep your drill bit completely vertical and upright. Chucks are either completely adjustable to take all sizes of drill or interchangeable, indicating you will need to alternate to accommodate various drill bits.

Drill bits: The most common kind of drill bits are twist drills which cut when rotated in a clockwise instructions. 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 quickly so its advisable to buy multiples of the sizes you utilize most often.

My saw blades keep breaking: Dont misery this is completely regular and practise makes ideal. However, check the stress of your blade for slackness and make certain you are using the right blade size/metal combination.

Beginning to Saw:.

The drill keeps moving around and wont discover its position: Make sure you have marked the drilling position plainly with a small dent to assist the drill. Guarantee the drill is fitted correctly into the chuck, it might not be directly. Above all, ensure the drill itself is totally upright.

Troubleshooting:.

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

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 stress. There have actually been some new developments in frame style over the previous few years and it is now possible to acquire more innovative variations which create the tension in the saw blade for you. Instead the stress is produced by means of a cam-lever system within the blade clamp, which enables 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 range from really 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, allowing you to saw from the inside out, rather than the outside in.

Fixing:.

Archimedian Hand Drill: This is a small spring packed drill, which works utilizing a deal with at the top which is lowered and pulled back as much as rotate the chuck at the tip. This requires both hands to use successfully.

The drill is getting too hot: If the drill overheats you can cool it down using a small amount of water or an oil based drilling coolant. Stopping working that, merely stop and enable the tools to cool off.

My drill isnt cutting: If the drill bit will not bite it might be since it is blunt or that the metal you are using is too tough for that specific type of drill. Some drills are harder than others so check their viability before you purchase.

Piercing.

Why Pierce? When you need access to an area which would otherwise be hard or difficult to reach e.g. the centre of a circle, piercing is required. 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, instead of the outdoors in.

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 consists of the chuck. It is managed by a foot pedal and can be used with a big range of various accessories consisting of drill bits.

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

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 dealing with forward, and you should be seated so that your workspace is around mid-chest height.
Position the blade on the outside of your significant line and gently draw the blade down. Get rid of the saw and repeat a number of times till 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 downward movement and simply re-positions on the upward. If you are having trouble getting the blade to bite you can apply some beeswax which is offered in blocks, to assist reduce the motion.
Saw on the exterior of your marked line and try to preserve a mild and consistent action.
Once 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.
File 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 wooden deal with must face you and the blade secures should be at the top of the frame.
Position your blade with the teeth at the top, pointing towards you and clamp completion furthest away into your frame using the wing-nut. (Do not be tempted to tighten up with pliers as this weakens the screw thread).
Then push gently versus the manage with your chest which will cause the frame to flex, and tighten the 2nd wing-nut to secure the blade.
Release the frame and check the tension of the blade by plucking it. You are looking for an unique ping to reveal the tension is appropriate. If you dont hear the ping just reverse and repeat the process once again until its best. (Failure to secure your blade with the best stress will lead to it breaking as quickly as you start to saw).

My arm is hurting: Check your seating position is appropriate and attempt to relax. Dont be lured to require the saw, you are simply assisting it so let the blade will do the work.

Bow drill: A bow drill is a traditional hand drill which can be utilized with one hand. It has a basic twisting mechanism which is developed with a pull/push motion using a wood baton and a piece of string. It is simple to control and is ideal for a novice.

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

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for solely that function. A durable base is combined with a movable chuck installed on a column, which is controlled by a lever at the side. The base can facilitate a clamp to hold work securely helping to make sure an accurate outcome every time.

Conserve this for later on.

Marking out and measuring: Before starting to saw, your metal should be clearly marked and determined so you have a guide to work to. Lines can be scribed onto metal utilizing a scriber or a set of dividers (which are comparable to a compass however with two points).

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

Piercing an access hole for sawing:.

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

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