A Guide to Sawing & Piercing

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Many of us are familiar with the concept of sawing wood, numerous find metal a little temperamental at initially, which is why we have put together this guide. Our objective is to assist you with both tools and method, which will, (in addition to some perseverance and practice), start you off on the proper course to successful sawing every time.

When buying your frame is whether you want an adjustable or a set design, another choice you require to make. An adjustable frame enables you to modify the size to accommodate damaged blades where as a set design will just take basic size blades as they are offered.

Saw frames: A jewellers saw frame is similar 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 dictated by the depth from the blade to the back of the frame and they range in size from 3 inch to 6 inch.

Sawing

There have been some new advancements in frame design over the previous few years and it is now possible to buy more sophisticated versions which develop the tension in the saw blade for you. Instead the tension is developed through a cam-lever mechanism within the blade clamp, which allows a quick release and positioning of the blade with the flick of a lever.

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 exceptionally fine. 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 basic rule, the thicker the metal, the coarser the blade you will need to suffice and vice versa. The table below consists of all the details you will require to choose the proper blade for the metal in concern:

Saw blade Grade

Blade Thickness mm

Teeth per CM

Drill Size mm

Suggested gauge Of metal mm

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 4/0
0.22
26.5
0.5
0.5 to 0.6

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 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 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

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

Saw blade Grade 3
0.36
16
0.8
0.9 to 1.2

Saw blade Grade 2
0.34
17.5
0.7
0.9 to 1.1

Setting up a blade into a saw:

Piercing.

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

Why Pierce? When you need access to an area which would otherwise be difficult or difficult to reach e.g. the centre of a circle, piercing is required. By drilling a small hole you offer 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.

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

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

My drills keep breaking: A blunt drill bit will break more quickly, as we intuitively apply more pressure if it does not appear to be cutting. They are likewise vulnerable to breakages if not secured properly in the chuck.

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

Conserve this for later.

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

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

Pendant Drill: A pendant motor is a multi-purpose, mechanised tool which has actually 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 utilized with a huge series of various attachments including drill bits.

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

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 actually been some brand-new developments in frame design over the previous couple of years and it is now possible to purchase more sophisticated versions which develop the stress in the saw blade for you. Instead 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. 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 incredibly 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 inside out, rather than the outdoors in.

Piercing an access hole for sawing:.

Repairing:.

Starting to Saw:.

Drill bits: The most typical type of drill bits are twist drills which cut when turned 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 remarkably quickly so its a good idea to purchase multiples of the sizes you utilize most often.

My drill isnt cutting: If the drill bit wont bite it may be because it is blunt or that the metal you are using is too difficult for that particular type of drill. Some drills are harder than others so check their viability prior to you buy.

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

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 dealing with forward, and you must be seated so that your working area is around mid-chest height.
Position the blade on the outside of your marked line and carefully draw the blade down. Get rid of the saw and repeat a couple of times up until 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 down movement and just re-positions on the upward. If you are having difficulty getting the blade to bite you can use some beeswax which is offered in blocks, to assist alleviate the motion.
Saw on the exterior of your significant line and attempt to maintain a steady and mild action.
Once the cutting is complete, undo the clamp at the top of the saw and pull the frame down to remove it from the work, or merely bring it back along the cutting line if that is possible.
File the rough edge to finish.

Sawing curves: Curves call for 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.

Troubleshooting:.

Defining and measuring: Before starting to saw, your metal must be plainly significant 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 but with 2 points). If you wish to transfer a more complex design onto metal, copy it onto tracing paper and cover the reverse with graphite as normal. Before transferring to the metal surface area, rub it over gently with Plasticine so that a sticky movie is left, which will reveal up the pencil marks produced when you re-trace. Once you have actually re-traced the style onto the metal, get rid of the tracing paper and review the pencil lines with a scriber.

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

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

Bench Mounted Pillar Drill: This is the supreme drilling tool and is utilized for exclusively that purpose. A tough base is integrated with a movable chuck mounted on a column, which is managed by a lever at the side. The base can assist in a clamp to hold work securely assisting to guarantee an exact outcome every time.

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 manage 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 the end outermost away into your frame utilizing the wing-nut. (Do not be lured to tighten with pliers as this deteriorates the screw thread).
Then push gently versus the manage with your chest which will trigger the frame to flex, and tighten up the 2nd wing-nut to secure the blade.
Release the frame and check the stress of the blade by plucking it. (Failure to protect your blade with the ideal stress will result in it breaking as quickly as you start to saw).

Once your design is scribed onto the metal, identify a position within the waste material to drill a suitable hole.
Mark the position with a scriber or centre punch.
Select the proper drill size to correspond with the saw blade you plan to use, (please refer to chart) and insert into the chuck ensuring it is gripped firmly.
Drill the hole. Start slowly making sure the drill bit has actually discovered its position. When in position increase the speed and lower with a gentle however continuous 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. When through, re-clamp your blade ensuring the tension is appropriate.
Saw out your shape.
When sawing is complete, get rid of the saw by un-clamping the blade nearest the deal with once again.
File to end up.

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

My saw blades keep breaking: Dont anguish this is perfectly normal and practise makes ideal. Examine the tension of your blade for slackness and make sure you are using the appropriate blade size/metal combination.

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