A Guide to Sawing & Piercing

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There have been some brand-new developments in frame style over the past couple of years and it is now possible to acquire more innovative versions which produce the stress in the saw blade for you. Rather the stress is created by means of a cam-lever mechanism within the blade clamp, which enables a fast release and positioning of the blade with the flick of a lever.

Another decision you require to make when purchasing your frame is whether you desire an adjustable or a set design. An adjustable frame permits you to modify the size to accommodate damaged blades where as a fixed design will only take basic size blades as they are sold.

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. 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 general function size for little scale projects, but the option is down to individual choice.

Saw piercing is likely to be among the very first significant tasks you try as a jeweller. It is the primary step in the transformation of a simple sheet of metal into something totally different and holds limitless possibilities. Although many of us are familiar with the concept of sawing wood, lots of find metal a little temperamental in the beginning, which is why we have created this guide. Our goal is to assist you with both tools and strategy, which will, (in addition to some patience and practice), start you off on the right course to effective sawing every time.

Sawing

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and can be found in a selection of grades which range from extremely coarse to extremely fine. Blades are characterized by the variety of teeth per cm so for example 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 basic rule, the thicker the metal, the coarser the blade you will need to cut it and vice versa. The table listed below contains all the info you will need to choose the correct blade for the metal in question:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Recommended gauge Of metal mm

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

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

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

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

Saw blade Grade 4
0.38
15
0.8
1.0 to 1.3

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

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

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

You will not require to purchase every grade of saw blade; a basic choice of coarse, medium and fine should be completely appropriate. Guarantee you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize most often.

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

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

Installing a blade into a saw:

Archimedian Hand Drill: This is a small spring loaded drill, which works utilizing a deal with at the top which is lowered and drew back as much as turn the chuck at the tip. This needs both hands to utilize efficiently.

Marking out and measuring: Before beginning to saw, your metal should be plainly 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 2 points).

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

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has a suspended motor and a versatile shaft connected to a hand piece, which contains the chuck. It is managed by a foot pedal and can be used with a huge series of different accessories including drill bits.

Tools for Piercing: There are several methods to drill a hole. You can utilize hand tools or mechanised tools; the concept is much the very same. When drilling a hole is to keep your drill bit upright and totally vertical, the most crucial 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, suggesting you will need to alternate to accommodate various drill bits.

My drill isnt cutting: If the drill bit wont bite it might be due to the fact that it is blunt or that the metal you are using is too tough for that particular kind of drill. Some drills are tougher than others so examine their viability prior to you purchase.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw ought to be kept in a vertical position with the blade dealing with forward, and you ought to be seated so that your workspace is around mid-chest height.
Position the blade on the exterior of your significant line and carefully draw the blade down. Eliminate the saw and repeat a number of times until you have a small indent to guide the blade.
Now begin to carefully move the saw up and down bearing in mind that the blade cuts on the down movement and just re-positions on the upward. If you are having problem getting the blade to bite you can use some beeswax which is sold in blocks, to assist ease the motion.
Saw on the exterior of your significant line and attempt to keep a steady and mild action.
When the cutting is complete, reverse the clamp at the top of the saw and pull the frame to eliminate it from the work, or simply bring it back along the cutting line if that is possible.
Submit the rough edge to end up.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for exclusively that purpose. A durable base is integrated 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 exact result each time.

My saw blades keep breaking: Dont misery this is completely normal and practise makes best. Nevertheless, examine the tension of your blade for slackness and make certain you are utilizing the proper blade size/metal mix.

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

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

The drill keeps walking around and wont discover its position: Make sure you have actually marked the drilling position clearly with a small damage to assist the drill. Likewise ensure the drill is fitted properly into the chuck, it may not be directly. Above all, guarantee the drill itself is totally upright.

Piercing a gain access to hole for sawing:.

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 tension. There have been some new developments in frame style over the previous few years and it is now possible to purchase more advanced versions which produce the tension in the saw blade for you. Rather the stress is developed through 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. 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 range from extremely coarse to incredibly great. 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.

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

Beginning to Saw:.

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 variety in size from 0.3 mm upwards. Drills can end up being blunt remarkably rapidly so its suggested to purchase multiples of the sizes you use most often.

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, simply stop and allow the tools to cool off.

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 manage ought to 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 completion outermost away into your frame using the wing-nut. (Do not be tempted to tighten with pliers as this compromises the screw thread).
Then push carefully against the handle with your chest which will cause the frame to bend, and tighten up the second wing-nut to protect the blade.
Release the frame and check the tension of the blade by plucking it. You are looking for a distinctive ping to reveal the tension is proper. If you do not hear the ping merely undo and duplicate the procedure once again until its. (Failure to secure your blade with the right stress will result in it breaking as quickly as you start to saw).

Piercing.

Fixing:.

Sawing straight lines: Straight lines are best tackled with the saw tilted a little forward utilizing long, smooth strokes.

Once your design is scribed onto the metal, identify a position within the waste product to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the correct drill size to correspond with the saw blade you mean to use, (please refer to chart) and insert into the chuck making sure it is grasped securely.
Drill the hole. Start gradually making sure the drill bit has actually found its position. As soon as in position increase the speed and lower with a constant but mild pressure until all the method through..
Now, reverse your saw blade at the clamp nearest the handle and thread the blade through the hole from the top. Once through, re-clamp your blade making sure the tension is proper.
Saw out your shape.
Remove the saw by un-clamping the blade nearest the deal with once again as soon as sawing is total.
Submit to finish.

Why Pierce? Piercing is required when you need access to a location which would otherwise be tough or difficult to reach e.g. the centre of a circle. By drilling a small hole you offer access to the saw blade which can then be fed through and re-clamped into the frame, allowing you to saw from the within out, rather than the outside in.

Repairing:.

Bow drill: A bow drill is a standard hand drill which can be utilized with one hand. It has a basic twisting mechanism 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.

Conserve this for later on.

My arm is hurting: Check your seating position is proper and try to unwind. Also dont be tempted to force the saw, you are simply guiding it so let the blade will do the work.

Centre punch: A centre punch is also a steel marker with a sharp point similar to a scriber. It has a shallow tip and is used in combination with a hammer to mark the position for subsequent drill holes. It is likewise possible to get automatic centre punches which dont need a hammer and instead have a push button action.

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

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