German SIFA tools SIFA models SIFA prices

SIFA tools refer to implements used in woodworking. They generally have sharp cutting edges, so safety must be prioritized during use. Frequent sharpening is required, especially for plane blades and chisels; keeping them sharp ensures ease of use and quality workmanship, as implied by the saying "sharpening the axe does not delay the woodcutting." Woodworking tools are categorized into power tools, pneumatic tools, and hand tools. Power tools are divided by function into multi-function tools (multi-purpose tools) and single-function tools (such as electric planers, jigsaws, circular saws, sanders, and engravers); pneumatic tools include polishers and nail guns; hand tools are divided into measuring tools, hand saws, woodworking planes, wood files, hand chisels, and sandpaper.

SIFA tool types

1) Frame saw. Also known as a buck saw, it consists of an H-shaped wooden frame, twisted rope with toggle, and saw blade. The ends of the saw blade are fixed to the frame with knobs, which can also be used to adjust the blade angle. After tightening the twisted rope, the blade is tensioned and ready for use. Frame saws are classified into coarse, medium, and fine types based on blade length and tooth pitch. Coarse saw blades are 650–750mm long, with a tooth pitch of 4–5mm; coarse saws are mainly used for sawing thicker lumber. Medium saw blades are 550–650mm long, with a tooth pitch of 3–4mm; medium saws are mainly used for sawing thin lumber or cutting tenons. Fine saw blades are 450–500mm long, with a tooth pitch of 2–3mm; fine saws are mainly used for sawing finer wood and cutting tenon shoulders. 2) Knife saw. A knife saw mainly consists of a saw edge and a handle, and can be classified into single-sided, double-sided, and backed knife saws. Single-sided knife saws have a blade length of 350mm, with teeth on one side; depending on the tooth function, they are divided into rip cuts and crosscuts. Double-sided knife saws have a blade length of 300mm, with teeth on both sides; typically, one side is for rip cutting and the other for crosscutting. Backed knife saws have a blade plate length of 250–300mm; the back of the blade is reinforced with a steel strip, and the teeth are finer, available in rip and crosscut versions. 3) Groove saw. A groove saw consists of a handle and a saw blade, with the blade being approximately 200mm long. Groove saws are mainly used for cutting grooves in wood. 4) Panel saw. Also known as a hand saw, it consists of a handle and a saw blade, with the blade being approximately 250–750mm long and a tooth pitch of 3–4mm; panel saws are mainly used for sawing wider boards. 5) Keyhole saw. The blade is narrow and long, with a pointed tip, and a length of approximately 300–400mm. Keyhole saws are mainly used for sawing narrow holes and slots. 6) Compass saw. Also known as a bow saw, its construction is similar to that of a frame saw, but the blade is narrower (approximately 10mm), mainly used for sawing arcs and curves. 7) Wire saw. Also known as a bow saw, it is made by bending a bamboo strip into a bow shape, with wire stretched between the ends; serrated edges are cut into the wire to perform the cutting. The wire is approximately 200–600mm long, and the saw bow is 800–900mm long. Wire saws are mainly used for sawing complex curves and cutting holes.

SIFA tool usage

1) Rip cutting method: When sawing, place the wood on a bench, step on the wood with your right foot, and align it perpendicular to the cutting line. Stand straight with your left foot at a 60° angle to the cutting line. Keep your right hand perpendicular to your right knee, and position your body at approximately a 45° angle to the cutting line. Lean forward slightly and move naturally, but avoid leaning left or lunging right. When sawing, hold the saw with your right hand and place your left thumb against the blade for positioning. Gently pull and push the saw a few times with your right hand (pull first, then push) to start the kerf, then remove your left hand from the blade edge. When the teeth have penetrated the wood by about 5mm, use your left hand to assist your right hand in lifting and pushing the frame saw. Lift the saw lightly, raising the hand slightly; push the saw with more force, applying simultaneous effort from the wrist, elbow, shoulder, and waist in a rhythmic manner. This ensures the blade follows the cutting line. Otherwise, the edge of the wood after rip cutting will be bent or uneven, or the cut surface will be inconsistent. 2) Crosscutting method: When sawing, place the wood on a bench. Stand to the left rear of the wood, hold the wood with your left hand, hold the saw with your right hand, and step on the wood with your left foot. The sawing motion is the same as for rip cutting. When using a frame saw, the lower end of the blade should tilt forward. For rip sawing, the upper end of the blade tilts backward at an angle of approximately 75°–90° (relative to the wood surface); for crosscutting, the blade tilts backward at an angle of approximately 30°–45°. Always ensure the blade follows the line without deviation. The cut must be straight; avoid swaying the blade left and right, which causes skewing. When the wood is nearly severed, stabilize the offcut with your left hand, slow down the sawing speed, and cut completely through. Do not leave any material to break off or snap by hand, as this can damage the blade and cause the wood to split along the grain, affecting quality.

SIFA tool maintenance

1) Tooth setting: The set is adjusted using a tooth setter. When setting the teeth, engage the slot of the tooth setter with the saw teeth and apply force to bend them left or right; the degree of set must meet the requirements for the kerf width. 2) Filing: When filing the saw teeth, clamp the saw blade in a vise so that the teeth are exposed. Depending on the size of the teeth, use a triangular steel file 100–200 mm in length to file each tooth sequentially from right to left. Apply uniform pressure with both hands; hold one face of the file vertically and flush against the lower cutting edge of the tooth, while the other face rests against the upper edge of the adjacent tooth. If the tooth set is found to be irregular, place the saw blade flat on a steel plate and use a wooden mallet to flatten all the teeth, then perform resetting and refiling. Additionally, maintain the saw frame; if damage is found to ropes, nuts, knobs, or wooden mortise-and-tenon joints, adjust or repair them promptly.

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