This standard outlines the specifications for wooden handles used in various types of axes including hand and felling axes, detailing timber selection, dimensions, tolerances, finishing, treatment, testing, and marking protocols. It ensures the handles meet criteria for strength, durability, and safety for use in forestry and related applications across India.
Overview
This standard outlines the specifications for wooden handles used in various types of axes including hand and felling axes, detailing timber selection, dimensions, tolerances, finishing, treatment, testing, and marking protocols. It ensures the handles meet criteria for strength, durability, and safety for use in forestry and related applications across India.
Audience
Contents
Structure
This section defines the range of wooden handles covered, including hand axes, felling axes of trade and estate patterns. It specifies that handles must adhere to precise dimensions illustrated in Figures 1-3 (all measurements in millimeters). The wedge securing the axe head must be glued and firmly hammered. Test results are to be rounded according to IS 2-1960 guidelines, maintaining the number of significant digits specified. Detailed dimensional requirements for each handle type are provided, ensuring proper fit and function.
IS 2891 cross-references multiple Indian Standards related to wooden tool handles and timber products, ensuring a comprehensive framework. Notable referenced codes include IS 620-1975 for general handle requirements and IS 2895-1965 to IS 7944-1975 covering related handle types and timber products. Treatment of green wood blanks involves immersion in 40% PEG-1500 or 60% urea solutions for about 24 hours followed by air or kiln seasoning to achieve optimal moisture content for durability and dimensional stability.
Handles must be fabricated from Class I timber species as per IS 620-1975, which includes durable hardwoods such as teak, shisham, mango, and sal. The timber should be well-seasoned, straight-grained, and free from defects like knots, cracks, or decay. These species offer the necessary toughness and elasticity to withstand the stresses involved in axe use.
The standard mandates diameter tolerances of +3 mm / -0 mm at the tool head fitting and ±2 mm elsewhere along the handle. Green blanks should be shaped close to final dimensions with allowance for shrinkage, then immersed in chemical solutions for moisture stabilization and seasoned to the required moisture content. Final finishing ensures the handle meets dimensional and quality requirements.
Green handle blanks undergo chemical treatment by soaking in either 40% PEG-1500 or 60% urea solutions for approximately 24 hours, followed by air or kiln seasoning until moisture content reaches between 8% and 15%. Post-manufacture, handles are dipped in raw linseed oil at room temperature to stabilize moisture content, minimize shrinkage, and prevent cracking. Wedges used to secure axe heads should be glued and hammered tightly for a secure fit.
Handles must conform to dimensions detailed in Figures 1 to 3 for hand axes and felling axes in both trade and estate patterns. Diameter tolerances at the head fitting are constrained to +3 mm / -0 mm and ±2 mm for other sections. Proper wedge fitting and finishing treatments are integral to ensuring handle performance and longevity.
Workmanship requirements and allowable defects follow IS 620-1975. Handles should be free from major defects and finished smoothly. Raw linseed oil dipping immediately after manufacture aids in controlling moisture variation. Dimensional tolerances must be strictly observed to guarantee quality and safety.
Testing includes impact resistance, dimensional verification, and visual inspection to ensure the handles can withstand service stresses. Results are rounded as per IS 2-1960 to maintain consistency. Handles undergo a 10-blow continuous impact test with a dummy axe head to simulate working conditions, ensuring toughness and reliability.
Sampling is performed randomly from production batches according to IS 620-1975 protocols. Acceptance or rejection depends on the number of defective samples relative to defined acceptance quality levels. Test results are rounded in compliance with IS 2-1960 to ensure uniformity in evaluation.
Each handle must bear clear and permanent markings including the manufacturer's name or trademark, timber species, manufacturing year, and axe type code (e.g., AH for hand axe). Optionally, the ISI certification mark may be applied to indicate conformity with Indian Standards. This labeling ensures traceability and assures users of the handle's compliance and suitability.
Green wooden blanks are sized near to their final dimensions with allowances for shrinkage, then soaked for about 24 hours in 40% PEG-1500 or 60% urea solutions. Following chemical treatment, blanks are air or kiln seasoned until moisture content reaches 8-15%. This process minimizes internal stresses, preventing checks, splits, and warping during drying. Final finishing is performed after seasoning to prepare handles for assembly.
Frequently Asked
IS 2891 advises using timber species classified under IS 620-1975, specifically Class I species such as teak, shisham, mango, and sal for felling axe handles due to their superior toughness and strength. For hand axe handles, timber from Class III species may be used. These classifications ensure handles possess adequate durability, shock resistance, and safety during use.
The dimensions for felling axe handles, including trade and estate patterns, are detailed in Figures 2 and 3 of IS 2891, specifying length, thickness, and width in millimeters. Diameter tolerance at the tool head fitting is +3 mm / -0 mm, while other areas have ±2 mm tolerance. Handles must be shaped from Class I timber per IS 620:1975, with wedges glued and hammered tightly to ensure secure assembly.
To prevent cracking and splitting, handles should be dipped in raw linseed oil at room temperature immediately after manufacture to stabilize moisture content. Additionally, green blanks must be chemically treated by immersion in 40% PEG-1500 or 60% urea solutions for approximately 24 hours, followed by air or kiln seasoning to achieve a moisture content between 8% and 15%. These measures reduce internal stresses and enhance handle durability.
Wooden axe handles must pass impact testing, wherein they are fitted with a dummy head and struck 10 times on a hardwood surface to verify toughness and shock resistance. Dimensional checks and visual inspections for defects are also conducted. Test results are rounded as per IS 2-1960. These tests ensure handles meet strength, durability, and safety standards outlined in IS 2891.
Handles must bear clear, permanent markings including the manufacturer's name or trademark, timber species, year of manufacture, and an axe type code such as AH (hand axe), AF (felling axe), AFEP (felling estate pattern), or AFTP (felling trade pattern). The ISI certification mark may also be applied to indicate conformity with Indian Standards and quality inspections, ensuring traceability and proper usage.
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