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IS 8292:1992 is the Indian Standard (BIS) for evaluation of working quality of timber under different woodworking operations- method of test. This standard specifies the method for evaluating the working quality of timber species under six different woodworking operations like planing, sanding, and boring. It provides a standardized procedure for testing and a five-grade system for classifying defects, enabling comparison of workability between different timbers.
Evaluation of working quality of timber under different woodworking operations- Method of test
Standard Test Methods for Conducting Machining Tests of Wood and Wood-Base Materials
Provides a nearly identical suite of tests for evaluating the machining properties of solid wood, including planing, shaping, turning, boring, and sanding.
ISO 18156:2016International Organization for Standardization, International
MediumCurrent
Wood-based panels — Machining properties — Test method
Covers the evaluation of machining properties (sawing, routing, sanding), but is specific to wood-based panels, not solid timber.
BS 373:1957British Standards Institution, UK
LowWithdrawn
Methods of testing small clear specimens of timber
Provides methods for determining physical and mechanical properties, not machining, but is a foundational standard for timber testing often used in conjunction with machinability studies.
Key Differences
≠IS 8292 mandates testing at a single moisture content of 12%, whereas ASTM D1666 requires testing at both 6% and 12% to evaluate performance in both dry and standard conditions.
≠The specimen dimensions specified in IS 8292 are generally smaller than those in ASTM D1666. For example, the planing test specimen in IS 8292 is 20x75x600 mm, while in ASTM D1666 it is approximately 25x127x914 mm.
≠The final evaluation in IS 8292 is a qualitative 5-grade system (1-Excellent to 5-Very Poor) for each defect. ASTM D1666 uses a similar visual grading but reports results more quantitatively as the percentage of specimens that are considered 'good' or 'excellent'.
≠ASTM D1666 allows for more flexibility and variation in tooling for comparative tests, such as using multiple cutting angles (15°, 20°, 25°) in planing, while IS 8292 specifies a single fixed cutting angle (20°).
Key Similarities
≈Both standards share the fundamental objective of assessing the working quality of timber by evaluating the surface and form defects produced during various machining operations.
≈The suite of woodworking operations tested is nearly identical, covering planing, shaping, turning, mortising, boring, and sanding.
≈The types of defects evaluated are consistent across both standards, including key issues like torn grain, fuzzy grain, raised grain, and chip marks.
≈Both standards rely on standardized machine settings (such as cutterhead speed and feed rate) to ensure the repeatability and comparability of test results.
Parameter Comparison
Parameter
IS Value
International
Source
Moisture Content for Testing
12%
6% and 12%
ASTM D1666-17(2023)
Planing Test Specimen Size (D x W x L)
20 x 75 x 600 mm
25.4 x 127 x 914 mm (1 x 5 x 36 in.)
ASTM D1666-17(2023)
Planer Cutterhead Speed
3600 rpm
3600 rpm
ASTM D1666-17(2023)
Planer Cutting Angle
20 degrees
15, 20, or 25 degrees (20 is standard)
ASTM D1666-17(2023)
Turning Test Lathe Speed
3000 to 3200 rpm
3150 rpm
ASTM D1666-17(2023)
Boring Test Bit Type
Double-spur machine bit of 25 mm diameter
Spur-machine bit of 1 in. (25.4 mm) diameter
ASTM D1666-17(2023)
Sanding Test Specimen Size (D x W x L)
12 x 100 x 200 mm
12.7 x 102 x 203 mm (0.5 x 4 x 8 in.)
ASTM D1666-17(2023)
Primary Reporting Method
Qualitative Grade (1-5) for each defect
Percentage of defect-free specimens
ASTM D1666-17(2023)
⚠ Verify details from original standards before use
Key Values5
Quick Reference Values
Target moisture content for testing12 %
Number of grades for defects5
Rough specimen size7.5 x 12.5 x 100 cm
Finished specimen size6.25 x 11.25 x 90 cm
Number of woodworking operations evaluated6
Tables & Referenced Sections
Key Tables
Table 1 - Grading of Defects for Different Woodworking Operations
What woodworking operations are covered by this standard?+
Planing, sanding, shaping, turning, mortising, and boring (Clause 5).
How are the results graded?+
Defects are graded on a 5-point scale, from Grade 1 (Excellent/Defect-free) to Grade 5 (Very Poor/Unusable) based on their severity (Clause 7 & Table 1).
What is the standard size of the finished test specimen?+
The finished test specimen should be 6.25 x 11.25 x 90 cm (Clause 4.1).