Saw piercing is most likely to be one of 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 limitless possibilities. Most of us are familiar with the idea of sawing wood, lots of discover metal a little temperamental at first, which is why we have actually put together this guide. Our aim is to help you with both tools and strategy, which will, (in addition to some persistence and practice), begin you off on the correct path to effective sawing every time.
When acquiring your frame is whether you desire an adjustable or a fixed style, another choice you need to make. An adjustable frame permits you to change the size to accommodate broken blades where as a fixed style will only take basic size blades as they are offered.
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 tension. 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.
There have been some new developments in frame design over the past few years and it is now possible to purchase advanced variations which develop the tension in the saw blade for you. One such design is from a company called Knew Concepts who have a range of lightweight aluminium frames which do not flex. Instead the stress is produced through a cam-lever system within the blade clamp, which enables a fast release and positioning of the blade with the flick of a lever. These specific clamps can also be turned 45 degrees which assists in sawing into challenging locations.
Saw blades: Blades for a jewellers piercing saw are offered in packages of 12, or by the gross (144) and come in a choice of grades which range from extremely coarse to extremely great. The table listed below consists of all the info you will require to choose the correct blade for the metal in concern:
Saw blade Grade
Blade Thickness mm
Teeth per CM
Drill Size mm
Advised gauge Of metal mm
You will not require to purchase every grade of saw blade; a standard selection of coarse, medium and fine must be perfectly appropriate. Ensure you purchase more of the medium grade (2/0 or 1/0) as these are what you will use most typically.
Saw blade Grade 4/0
0.5 to 0.6
Saw blade Grade 2/0
0.6 to 0.8
Saw blade Grade 3
0.9 to 1.2
Saw blade Grade 6/0
0.35 to 0.5
Saw blade Grade 3/0
0.6 to 0.7
Saw blade Grade 8/0
Saw blade Grade 5/0
0.4 to 0.55
Saw blade Grade 1/0
0.6 to 0.95
Saw blade Grade 4
1.0 to 1.3
Saw blade Grade 1
0.8 to 1.0
Saw blade Grade 2
0.9 to 1.1
Installing a blade into a saw:
Marking out and determining: Before beginning to saw, your metal needs to be plainly marked 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 comparable to a compass but with two points).
Sawing straight lines: Straight lines are best taken on with the saw tilted somewhat forward using long, smooth strokes.
Scriber: A scriber is a fine marking tool with a narrow and long pointer. It is used to scribe designs onto metal and can be used to mark the positions for drilling.
Piercing an access hole for sawing:.
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 very same multi-purpose functionality of a pendant drill and can be utilized with a vast array of accessories. Rotary hand drills can be utilized in combination with a drill stand to guarantee vertical drilling.
My arm is injuring: Check your seating position is proper and try to relax. Likewise dont be lured to require the saw, you are simply guiding it so let the blade will do the work.
My saw blades keep sticking: Apply some type of lubricant to ease the sawing movement. Some jewellers utilize spittle, but you can also use beeswax. Simply run it along the blade and continue to saw.
Starting to Saw:.
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. There have been some brand-new advancements in frame style over the past few years and it is now possible to purchase more innovative variations which produce the stress in the saw blade for you. Rather the stress is produced via a cam-lever mechanism 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 choice of grades which range from very coarse to very fine. By drilling a little hole you provide 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 outdoors in.
As soon as your design is scribed onto the metal, determine a position within the waste product to drill an appropriate hole.
Mark the position with a scriber or centre punch.
Select the proper drill size to correspond with the saw blade you mean to utilize, (please describe chart) and insert into the chuck ensuring it is gripped tightly.
Drill the hole. Start slowly making certain the drill bit has actually discovered its position. Once in position increase the speed and press down with a continuous however gentle pressure till all the method through..
Now, undo 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 ensuring the tension is proper.
Saw out your shape.
When sawing is total, get rid of the saw by un-clamping the blade nearest the manage again.
Submit to complete.
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 force the blade.
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 should 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 utilizing the wing-nut. (Do not be lured to tighten up with pliers as this deteriorates the screw thread).
Push carefully versus the manage with your chest which will trigger the frame to flex, and tighten up the second wing-nut to secure the blade.
Launch the frame and examine the tension of the blade by plucking it. You are looking for a distinct ping to show the stress is correct. If you do not hear the ping simply reverse and duplicate the procedure again up until its. (Failure to secure your blade with the right tension will result in it breaking as quickly as you start to saw).
Centre punch: A centre punch is also a steel marker with a sharp point comparable to a scriber. It has a shallow suggestion and is utilized in conjunction 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.
Bow drill: A bow drill is a traditional hand drill which can be utilized with one hand. It has a simple twisting mechanism which is developed with a pull/push motion utilizing a wood baton and a piece of string. It is simple to manage and is perfect for a newbie.
Archimedian Hand Drill: This is a little spring packed drill, which works using a handle at the top which is lowered and pulled back approximately rotate the chuck at the pointer. This requires both hands to utilize efficiently.
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 consists of the chuck. It is controlled by a foot pedal and can be utilized with a substantial series of different attachments consisting of drill bits.
Why Pierce? Piercing is required when you need access to a location which would otherwise be difficult or tough to reach e.g. the centre of a circle. By drilling a little 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, instead of the outside in.
My drill isnt cutting: If the drill bit will not bite it might be due to the fact that it is blunt or that the metal you are using is too hard for that particular type of drill. Some drills are tougher than others so inspect their suitability before you buy.
My drills keep breaking: A blunt drill bit will break more quickly, as we intuitively use more pressure if it does not appear to be cutting. They are also vulnerable to damages if not protected properly in the chuck.
Conserve this for later on.
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, just stop and enable the tools to cool down.
My saw blades keep breaking: Dont misery this is perfectly regular and practise makes ideal. Examine the tension of your blade for slackness and make sure you are utilizing the appropriate blade size/metal mix.
Drill bits: The most common type of drill bits are twist drills which cut when rotated in a clockwise instructions. They are made from a variety of toughened products and variety in size from 0.3 mm upwards. Drills can end up being blunt remarkably quickly so its advisable to purchase multiples of the sizes you use most often.
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 held 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 exterior of your significant line and gently draw the blade down. Remove the saw and repeat a number of times up until you have a small indent to assist the blade.
Now start to carefully move the saw up and down keeping in mind that the blade cuts on the down motion and merely re-positions on the upward. If you are having difficulty 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 significant line and try to preserve a gentle and constant action.
Once the cutting is complete, undo the clamp at the top of the saw and pull the frame 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.
The drill keeps moving around and will not discover its position: Make sure you have actually marked the drilling position clearly with a tiny dent to direct the drill. Make sure the drill is fitted properly into the chuck, it may not be directly. Above all, guarantee the drill itself is fully upright.
Bench Mounted Pillar Drill: This is the ultimate drilling tool and is utilized for exclusively that purpose. A strong base is integrated 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 safely helping to make sure an exact result whenever.
The most important thing to remember when drilling a hole is to keep your drill bit upright and totally vertical. Chucks are either fully adjustable to take all sizes of drill or interchangeable, meaning you will require to alternate to accommodate various drill bits.