Wood carving chisel sweep No. 4 Kirschen 31740

Wood carving chisel models in the Kirschen 31740 family cut curved flutes, ornament and fine relief in hardwood. The blade is hardened to 61 HRC and ground at a 17° bevel. That combination holds a working edge through oak, walnut and similar dense timbers. The blade profile is straight in length, with sweep No. 4 under the European classification. Total length measures 245 mm and blade height 25 mm.

The handle is turned from white oak with an octagonal cross-section. Eight flats stop the tool rolling on the bench. They also let the carver feel edge orientation while rotating the chisel. Ten blade widths run from 2 mm to 20 mm. Narrow sizes suit thin lines and tight corners. Wider sizes clear broader grooves in fewer passes. Forging and heat treatment follow traditional German production methods.

Wood carving chisel sweep No. 4: build and cutting geometry

Steel, hardness and bevel

Heat treatment brings the blade to 61 HRC. That level supports hardwood work without making the edge brittle. The 17° bevel is set at the factory and arrives ready to hone. A shallow bevel reduces the push force needed on each cut. Sweep No. 4 gives a moderate curve, which suits flowing lines rather than deep gouging.

• Blade hardness: 61 HRC
• Factory bevel angle: 17°
• Sweep No. 4 under European carving classification
• Blade straight along its length, not bent or spoon-shaped
• Blade height: 25 mm
• Total length: 245 mm

Carvers can restore the edge on a natural Arkansas stone or a comparable fine abrasive. Keeping the original 17° angle preserves the intended cutting behaviour. The uniform 25 mm blade height means every width in the family handles alike. Only the cutting edge dimension changes between models, so a set behaves consistently.

Handle and tool control

The octagonal white oak handle takes mallet and hand pressure during carving. Flats give a tactile reference point for the cutting edge position. This matters when the chisel is turned repeatedly to follow a curve. The 245 mm total length balances reach against close control. Weight increases with blade width, which helps steady the larger sizes.

• Handle material: white oak
• Handle section: octagonal, eight flats
• Anti-roll shape for bench storage
• Length balanced for two-hand guidance
• Suitable for mallet-assisted and hand-pushed cuts

Ten widths from 2 mm to 20 mm let a workshop match the tool to the line being cut. Fine widths trace hair detail and lettering serifs. Mid widths shape leaves, scrolls and drapery folds. The widest versions remove background waste faster. A leather tool roll keeps edges protected between jobs.

Common applications

Relief carving in oak, walnut and other hardwoods is the main use. The sweep No. 4 profile shapes curved grooves, petals, scroll volutes and moulding details. Furniture restorers use narrow widths to recut worn ornament. Instrument makers and pattern makers apply the chisel to shallow concave surfaces. Sign carvers work incised lettering with the smaller sizes. Model makers and sculpture studios use the wider blades to rough out curves before finishing. The tool also serves training workshops where consistent bevel geometry matters.

Catalogue reference data

The 31740 range lists ten blade widths: 2, 4, 6, 8, 10, 12, 14, 16, 18 and 20 mm. Catalogue weights span 57 g for the 2 mm model up to 124 g for the 18 mm model. Blade height stays at 25 mm and total length at 245 mm across all widths. Each item carries its own article number derived from the family code plus the blade width.

Edges leave the factory ground at 17° and hardened to 61 HRC. Store blades separately or in a pocketed roll to avoid chipping. Resharpen before the edge rounds over, since light honing restores performance faster than full regrinding.