Schwan keyhole saw 300 mm, with wooden handle

Description

The Schwan keyhole saw 300 mm is a hand saw with a narrow blade that tapers towards the tip, used for sawing curved shapes and openings in board materials and wood. The blade length is 300 mm and the blade is not stiffened, so it can turn in the kerf and follow a curved line.

The keyhole saw works because of its narrow blade: when the blade is narrow, the kerf can curve without the side of the blade rubbing against the kerf walls. The blade is still stiff enough for straight cuts, so the same saw cuts both the outline of an opening and its straight sides. The narrow tip fits through a drilled starting hole in the middle of a board, so an opening can be sawn without touching the edge.

The handle is made of wood and is fixed to the heel of the blade. The wooden handle gives a grip in line with the blade, which is essential in curved sawing: the saw is turned from the wrist, and the grip sets the angle of the blade. The shape of the handle also allows work in tight spots where a backed saw or a wide-bladed saw does not fit.

Typical uses are openings in plasterboard and wood-based boards, curved shapes in wood and plywood, and cuts that a wider blade cannot reach. For straight, clean cuts and joints, the Schwan tenon saw 250 mm, with wooden handle is the right choice, and for longer straight cuts the Schwan handsaw 400 mm, with wooden handle. Country of manufacture: Germany.

Intended use and suitability:

The keyhole saw is a saw for shaped cuts: it cuts where the cutting line is not straight or where the cut starts in the middle of the workpiece.

• Openings in boards: openings for electrical boxes, pipes and other penetrations in plasterboard and wood-based board; a starting hole is drilled inside the opening and the blade tip is inserted through the hole.
• Curved shapes: arcs, rounded corners and wavy lines in wood and plywood; the narrow blade turns in the kerf without the side binding.
• Tight spots: cuts inside cabinets, casings and structures where a wide blade or a backed saw does not fit.
• Fitting work: fitting the end shapes of mouldings and panels to the mating piece when the cutting line follows a profile.
• Demolition sawing: small local openings in an existing structure without power tools.

Package contents:

• 1 x keyhole saw 300 mm, with wooden handle

Features:

• Narrow blade tapering towards the tip: allows curved cuts and starting a cut from a drilled hole.
• Blade length 300 mm: the long stroke keeps the cut even in thicker boards too.
• Unstiffened blade: no limit on cutting depth, the blade can pass through the workpiece across its full width.
• Straight and curved sawing with the same blade: the outline and straight sides of an opening without changing tools.
• Wooden handle: grip in line with the blade, turning controlled from the wrist.
• Made in Germany.

Technical specifications:

• Saw type: keyhole saw (saw for shaped cuts, narrow blade).
• Blade length: 300 mm.
• Blade shape: narrow, tapering towards the tip, unstiffened.
• Handle material: wood.
• Country of manufacture: Germany.
• Materials: wood, plywood, board materials.

Schwan keyhole saw 300 mm instructions for use:

Preparation: Mark the whole cutting line so that it is clearly visible. Clamp the workpiece or support the board so that the area being sawn cannot vibrate.

Starting in the middle of the workpiece: Drill a starting hole inside the area to be cut, with a diameter larger than the blade tip. Insert the blade tip into the hole and start sawing with short strokes.

Starting from the edge: Place the blade tip on the line at a shallow angle and make a few short strokes to open the kerf before moving on to full-length strokes.

Curved cuts: Saw with short strokes and turn the saw gradually between strokes. Do not force the blade sideways in the middle of a stroke: the narrow blade will bend or break. For tight curves, first saw relief cuts outside the curve so that the material comes away in pieces.

Straight cuts: Use the full length of the blade with even strokes and keep the blade perpendicular to the workpiece.

Maintenance: Wipe the blade after use and apply a thin film of oil. Remove resin and glue with a solvent. Store in a dry place so that the blade does not press against other tools. Check the handle fixing regularly.

Warnings:

• The teeth are sharp: handle the blade by its heel and store the saw with the blade protected.
• The narrow blade can break under side load, so do not use the saw as a lever and do not force a curve.
• Clamp or support the workpiece; a flexing board pinches the blade in the kerf.
• Before sawing an opening for a penetration, check that there are no electrical cables or pipes at that spot.
• Wear safety glasses; sawdust and chips fly towards the face.
• Wear a respirator when sawing plasterboard.
• Keep out of the reach of children.

Frequently asked questions (FAQ):

What is the Schwan keyhole saw 300 mm for? For curved cuts and for sawing openings in wood, plywood and board materials, and for cuts in tight spots.

Can an opening be sawn in the middle of a board? Yes. Drill a starting hole inside the opening and insert the blade tip through the hole, so the edge does not need to be broken.

How tight a curve can the saw cut? The width of the blade limits how tight the curve can be. For tight curves, saw relief cuts outside the curve so that the material comes away in pieces and the blade does not bind.

What is the difference between a keyhole saw and a tenon saw? The narrow, unstiffened blade of the keyhole saw turns in the kerf for curved cuts, whereas the Schwan tenon saw 250 mm, with wooden handle is stiffened and cuts a straight kerf.

Is the saw suitable for plasterboard? Yes. Openings for electrical boxes in plasterboard are a typical use for a keyhole saw; wear a respirator because of the dust.

Why does the blade bind when sawing? The most common cause is a flexing or unsupported board that pinches the kerf closed. Support the workpiece on both sides of the cutting line.

Where is the saw made? In Germany.

Recycling instructions:

Separate a keyhole saw that is no longer in use into its parts: the blade goes to metal collection, the wooden handle to wood waste or energy recovery waste. Protect the teeth before disposal, for example with cardboard. Packaging cardboard goes to cardboard collection and plastic film to plastic collection.