A Guide to Sawing & Piercing

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When purchasing your frame is whether you desire an adjustable or a fixed style, another choice you need to make. An adjustable frame permits you to modify the size to accommodate broken blades where as a fixed design will just take standard size blades as they are sold.

Saw frames: A jewellers saw frame is comparable in style to a small 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 range in size from 3 inch to 6 inch.

Sawing

Saw piercing is likely to be among the first significant tasks you try as a jeweller. It is the primary step in the improvement of a simple sheet of metal into something entirely various and holds unlimited possibilities. Although the majority of us are familiar with the principle of sawing wood, many find metal a little unstable at first, which is why we have created 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 successful sawing every time.

There have been some new advancements in frame style over the past few years and it is now possible to acquire advanced variations which create the stress in the saw blade for you. One such style is from a business called Knew Concepts who have a range of light-weight aluminium frames which do not flex. Rather the tension is produced by means of 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 specific clamps can likewise be turned 45 degrees which facilitates sawing into difficult locations.

Saw blades: Blades for a jewellers piercing saw are sold in packages of 12, or by the gross (144) and come in a choice of grades which range from very coarse to very great. The table listed below consists of all the details 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

Recommended gauge Of metal mm

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

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 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 3
0.36
16
0.8
0.9 to 1.2

Saw blade Grade 1
0.3
19
0.7
0.8 to 1.0

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

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

You will not need to purchase every grade of saw blade; a fundamental choice of coarse, medium and fine must be perfectly adequate. However, ensure you buy more of the medium grade (2/0 or 1/0) as these are what you will utilize usually.

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

Saw blade Grade 8/0
0.17
30
0.3
Approximately 0.4

Installing a blade into a saw:

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

Starting to Saw:.

My drill isnt cutting: If the drill bit will not bite it may be because it is blunt or that the metal you are using is too hard for that particular type of drill. Some drills are harder than others so check their viability prior to you buy.

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 style over the previous couple of years and it is now possible to buy more sophisticated variations which create the tension in the saw blade for you. Rather the stress is developed by means of a cam-lever mechanism 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 bundles of 12, or by the gross (144) and come in a choice of grades which range from very coarse to very 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, permitting you to saw from the within out, rather than the outside in.

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 contains the chuck. It is controlled by a foot pedal and can be utilized with a huge series of different accessories consisting of drill bits.

Conserve this for later on.

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

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

Piercing a gain access to hole for sawing:.

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

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

The most crucial thing to remember when drilling a hole is to keep your drill bit upright and completely 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.

When your design is scribed onto the metal, recognize a position within the waste material to drill an ideal hole.
Mark the position with a scriber or centre punch.
Select the correct drill size to refer the saw blade you plan to utilize, (please describe chart) and insert into the chuck making sure it is grasped firmly.
Drill the hole. Start slowly making sure the drill bit has actually found its position. As soon as in position increase the speed and lower with a gentle however constant pressure until all the way through..
Now, undo your saw blade at the clamp nearest the handle and thread the blade through the hole from the top. As soon as through, re-clamp your blade ensuring the stress is right.
Saw out your shape.
When sawing is complete, eliminate the saw by un-clamping the blade nearest the manage once again.
Submit to complete.

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, merely stop and permit the tools to cool down.

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

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 same multi-purpose functionality of a pendant drill and can be used with a wide variety of accessories. Rotary hand drills can be utilized in combination with a drill stand to guarantee vertical drilling.

Piercing.

Why Pierce? Piercing is required when you require access to a location which would otherwise be impossible or challenging to reach e.g. the centre of a circle. By drilling a small hole you supply access to the saw blade which can then be fed through and re-clamped into the frame, enabling you to saw from the within out, instead of the outside in.

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

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 wood deal with ought to 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 outermost away into your frame using the wing-nut. (Do not be lured to tighten up with pliers as this compromises the screw thread).
Push gently against the manage with your chest which will trigger the frame to bend, and tighten up the 2nd wing-nut to secure the blade.
Launch the frame and inspect the stress of the blade by plucking it. You are searching for an unique ping to reveal the stress is appropriate. If you dont hear the ping merely reverse and repeat the process again up until its. (Failure to secure your blade with the best stress will lead to it breaking as quickly as you start to 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 idea used in conjunction with a hammer to mark the position for subsequent drill holes. It is also possible to get automatic centre punches which dont require a hammer and instead have a push button action.

Troubleshooting:.

Drill bits: The most typical kind of drill bits are twist drills which cut when rotated in a clockwise direction. They are made from a range of toughened materials and variety in size from 0.3 mm upwards. Drills can become blunt surprisingly rapidly so its recommended to purchase multiples of the sizes you use most often.

My arm is harming: Check your seating position is correct and try to relax. Do not be lured to require the saw, you are just assisting it so let the blade will do the work.

Archimedian Hand Drill: This is a small 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 pointer. This needs both hands to utilize efficiently.

Bow drill: A bow drill is a conventional hand drill which can be used with one hand. It has an easy twisting mechanism which is created with a pull/push movement utilizing a wooden baton and a piece of string. It is simple to control and is ideal for a novice.

Seat yourself at the bench and hold the work in position on the bench peg, holding the saw in your opposite hand.
Your saw must be held in a vertical position with the blade dealing with forward, and you ought to be seated so that your working area is around mid-chest height.
Position the blade on the outside of your marked line and gently draw the blade down. Remove the saw and repeat a number of times till you have a small indent to guide the blade.
Now begin to carefully move the saw up and down keeping in mind that the blade cuts on the downward motion and merely re-positions on the upward. If you are having trouble getting the blade to bite you can apply some beeswax which is sold in blocks, to assist alleviate the motion.
Saw on the exterior of your marked line and try to maintain a steady and gentle action.
Once the cutting is total, undo the clamp at the top of the saw and pull the frame down to eliminate it from the work, or simply bring it back along the cutting line if that is possible.
File the rough edge to finish.

Bench Mounted Pillar Drill: This is the supreme drilling tool and is used for solely that function. A sturdy base is integrated 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 safely helping to ensure a precise result every time.

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

Fixing:.

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