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IS 4423:1999 is the Indian Standard (BIS) for hand-sawing of timber - guide. This standard provides guidance on the techniques, equipment selection, and safety measures for the hand-sawing of timber. It covers various types of hand saws and best practices to achieve accurate cuts while minimizing timber wastage and operator fatigue.
BS 3159-1:1990BSI (British Standards Institution), UK
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Woodworking saws - Part 1: Specification for hand saws
Specifies the manufacturing requirements for handsaws (the tool), not the process of sawing timber.
ISO 18218:2015ISO (International Organization for Standardization)
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Saws for woodworking — Terminology and definitions
Provides standardized terminology for saws, which is used within the IS guide, but is not a procedural guide itself.
BS 1186-2:2008BSI (British Standards Institution), UK
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Timber for and workmanship in joinery - Part 2: Specification for workmanship
Specifies the required quality and tolerances for finished joinery, which is an outcome of good sawing practice.
Key Differences
≠The primary difference is scope: IS 4423 is a procedural 'how-to' guide for the manual process of hand-sawing, whereas equivalent international standards are typically product specifications for the saw itself (e.g., BS 3159-1) or workmanship quality standards for the finished product (e.g., BS 1186-2).
≠IS 4423 includes detailed sections on saw maintenance, such as sharpening (filing) and setting of teeth. International product standards specify the 'as-manufactured' condition and do not typically provide guidance on user maintenance.
≠The Indian standard is highly prescriptive, providing specific instructions and diagrams for sawing techniques. In contrast, modern international workmanship standards tend to be performance-based, specifying the required outcome (e.g., dimensional accuracy, surface finish) rather than the method used.
≠IS 4423 is exclusively focused on manual hand-sawing, reflecting a specific context of construction practice. Most international woodworking standards are tool-agnostic or have a stronger focus on machine-based processing which is more common in many international markets.
Key Similarities
≈The fundamental classification of saw types (e.g., rip saw, cross-cut saw, tenon saw) and their intended use (sawing with the grain vs. across the grain) is consistent with international terminology and practice, as defined in standards like ISO 18218.
≈The underlying principles for achieving a good cut—ensuring the timber is properly supported, marking lines accurately, and maintaining a correct sawing angle—are universally recognized and are implicit in both the IS guide and international workmanship standards.
≈Basic saw tooth geometry concepts, such as rake angle, bevel angle, and the purpose of 'set' to create a kerf wider than the blade, are common technical principles shared between the IS guide and specifications in standards like BS 3159-1.
Parameter Comparison
Parameter
IS Value
International
Source
Teeth for Rip Saw (Teeth per 25mm)
4 to 6 (coarse); 8 (fine)
Approx. 4.5 to 7 TPI (Teeth Per Inch), which is ~5 to 7 teeth per 25mm.
BS 3159-1:1990
Teeth for Cross-cut Saw (Teeth per 25mm)
8 to 10
Approx. 8 to 12 TPI (Teeth Per Inch), which is ~8 to 12 teeth per 25mm.
BS 3159-1:1990
Tooth Set (as a factor of blade thickness)
Set width should be 1.5 times blade thickness for softwood; 1.33 times for hardwood.
Total set over the points of the teeth shall not exceed 1.5 times the blade thickness.
BS 3159-1:1990
Rake Angle (Cross-cut Saw)
The front of the tooth should have a slope of about 15° from the perpendicular.
Tooth profile geometry specified for manufacturers includes a rake angle, typically between -10° and -20°.
General Saw Manufacturing Practice / BS 3159-1:1990
Rake Angle (Rip Saw)
The front of the tooth should be filed square to the blade (0° rake).
Tooth profile specified for rip saws is typically 0° to 8°.
General Saw Manufacturing Practice / BS 3159-1:1990
Blade Hardness
Not specified in this guide.
Specified as a range, typically 45 HRC to 52 HRC for the blade body.
BS 3159-1:1990
⚠ Verify details from original standards before use
Key Values2
Quick Reference Values
recommended angle for cross cutting45 degrees to the face
recommended angle for rip sawing60 degrees to the face