wooden handles for felling axes and hand axes

IS 2891: Scope & Key Specifications for Wooden Handles for Axes

• Scope: Covers specifications for wooden tool handles, specifically for axes (hand, felling trade, and estate patterns).
• General Requirements:
  • Handles must conform to dimensional details shown in Figures 1 to 3 (all dimensions in mm).
  • Wedge for securing the head must be glued and hammered tight.
• Rounding Off Results:
  • Test results rounded as per IS 2-1960.
  • Retain significant figures equal to those specified in the standard.
• Dimensions:
  • Detailed dimensions for different axe handle types are provided in Figures 1-3.
  • Typical dimensions include length, thickness, and wedge cut details.

Example dimension notes:

flowchart LR
    A[Wooden Axe Handle] --> B[Handle Dimensions (Fig.1-3)]
    B --> C[Length, Thickness, Wedge Cut]
    A --> D[Wedge]
    D --> E[Glue + Hammer Tight]
    A --> F[Testing]
    F --> G[Round off as per IS 2-1960]

For precise dimensions, refer to Figures 1-3 in IS 2891.

IS 2891 - References Summary

The code references several related Indian Standards for wooden tool handles and timber products, ensuring harmonization and comprehensive coverage:

Key Related IS Codes:

• IS 620-1975: General requirements for wooden tool handles.
• IS 2895-1965: Wooden handles for picks and beaters.
• IS 2896-1965: Wooden handles for woodworking chisels and gouges.
• IS 2899-1964: Wooden handles for adzes.
• IS 4953-1973: Wooden handles for hand hammers.
• IS 5942-1970: Wooden handles for POWRAHS.
• IS 6644-1972: Tinman's mallets and caulking mallets.
• IS 6676-1972: Bossing (plumber’s) mallets.
• IS 6729-1972: Wooden paddles.
• IS 7548-1975: Timber half wrought for sporting rifles.
• IS 7944-1975: Bamboo tent poles.

Important Specifications:

• Rounding off values: As per IS 2-1960, final test values are rounded to the same significant digits as specified.
• Treatment of green blanks (Clause 4.2):
  • Immerse in 40% PEG-1500 or 60% urea solution for ~24 hours.
  • Air or kiln season until desired moisture content is reached.

Contact & Regional Offices:

For standards and further details, contact the Bureau of Indian Standards (BIS) regional offices listed in the document.

flowchart TD
    A[Green Blanks] --> B[Treatment]
    B --> C[Immersion in PEG-1500 (40%) or Urea (60%) for 24 hrs]
    C --> D[Air or Kiln Seasoning]
    D --> E[Final Finishing of Handles]

This ensures dimensional stability and durability of wooden handles per IS 2891.

IS 2891 refers to specifications for timber handles, referencing IS 620-1975 for timber species classification.

Key Points on Species of Timber (from IS 620-1975):

• Class I Handles Timber Species (suitable for felling axe handles):
  • Teak (Tectona grandis)
  • Shisham (Dalbergia sissoo)
  • Mango (Mangifera indica)
  • Sal (Shorea robusta)
  • Other hardwoods with similar strength and toughness

Specifications for Handles (IS 2891):

• Handles must be made from Class I timber species per IS 620.
• Timber should be well-seasoned, straight-grained, and free from defects like knots or cracks.
• The timber must have adequate toughness and elasticity to withstand impact.

Summary Table: Typical Class I Timber Properties (IS 620)

flowchart LR
    A[IS 2891: Timber Handles] --> B[Refer IS 620-1975]
    B --> C[Class I Timber Species]
    C --> D[Teak, Shisham, Mango, Sal]
    D --> E[Properties: High strength, toughness]
    E --> F[Manufacture Handles]

Note: Always verify timber species availability and quality per local standards and supplier certifications.

IS 2891 - Material Requirements for Wooden Tool Handles

Key Specifications:

• Tolerances on Handle Diameter (Clause 6.2):

  • At tool head fit: +3 mm / -0 mm
  • Elsewhere on handle: ± 2 mm

• Treatment of Green Blanks (Clause 4.2):

  • Convert blanks close to final shape, allowing oversize for shrinkage.
  • Immerse in:
    • 40% (w/w) Polyethylene Glycol (PEG)-1500 solution for ~24 hours, or
    • 60% (w/w) Urea solution for ~24 hours.
  • Follow with air or kiln seasoning until desired moisture content is reached.
  • Final finishing after seasoning.

• Rounding Off Test Results (Clause 7):

  • Round off values per IS 2-1960.
  • Retain significant figures equal to the specified value.

Summary Table for Diameter Tolerances:

Additional Notes:

• Material must be properly seasoned to avoid shrinkage or warping.
• Use PEG or urea treatment to stabilize wood moisture content before finishing.
• Final dimensions must respect tolerance limits for proper tool fit and performance.

flowchart LR
    A[Green Blank] --> B[Treatment: PEG or Urea Soak (24 hrs)]
    B --> C[Air/Kiln Seasoning]
    C --> D[Final Finishing]
    D --> E[Handle with Specified Tolerances]

This ensures durability and compliance with IS 2891 for wooden tool handles.

IS 2891: Treatment of Wooden Handles - Key Points

1. Treatment of Green Blanks (Clause 4.2)

• Size preparation: Convert green blanks close to final handle shape, allowing oversize for shrinkage and finishing.
• Chemical treatment: Immerse immediately in:
  • 40% (w/w) Polyethylene Glycol (PEG-1500) solution or
  • 60% (w/w) Urea solution
• Duration: Approximately 24 hours.
• Post-treatment: Air- or kiln-season until desired moisture content is reached.
• Finishing: Done after seasoning.

2. Post-Manufacture Treatment (Clause 5.2)

• Dip handles in raw linseed oil at room temperature immediately after manufacture to stabilize moisture content.

3. Dimensions and Tolerances (Clause 6.1)

• Handles must conform to dimensions shown in Fig. 1 to 3 (wooden axes handles).
• Wedges should be glued and hammered tight (saw cut for wedge specified).

Summary Table for Treatment

flowchart TD
    A[Green Blanks Prepared] --> B[Immersion in 40% PEG or 60% Urea (24 hrs)]
    B --> C[Air/Kiln Seasoning]
    C --> D[Final Finishing]
    D --> E[Post-manufacture Dip in Raw Linseed Oil]

This process ensures durability, moisture stability, and dimensional accuracy of wooden handles per IS 2891.

IS 2891: Dimensions and Tolerances for Wooden Handles

Key Specifications:

• Clause 6.1 (Dimensions): Handles must conform to dimensions shown in Figures 1 to 3:

  • Fig. 1: Wooden handle for hand axes
  • Fig. 2: Wooden handle for felling axes (trade pattern)
  • Fig. 3: Wooden handle for felling axes (estate pattern)

• Clause 6.2 (Tolerances on Diameter):

  • At tool head fitting: +3 mm / -0 mm
  • Elsewhere: ±2 mm

Additional Notes:

• Wedge: Should be dipped in glue and hammered tight into the saw cut.
• Post-manufacture treatment: Dip handles in raw linseed oil at room temperature to stabilize moisture content (Clause 5.2).

Summary Table of Tolerances

Visual Reference (Simplified)

graph LR
A[Handle] --> B[Head fitting area]
A --> C[Other areas]
B -- Tolerance +3/-0 mm --> D[Diameter]
C -- Tolerance ±2 mm --> D

This ensures proper fit and durability per IS 2891 standards.

IS 2891: Workmanship and Finish - Key Points

• Reference Standard: Workmanship, permissible defects, treatment, and sampling follow IS 620-1975.

• Treatment:

  • Immediately after manufacture, handles should be dipped in raw linseed oil at room temperature to retard moisture content changes.

• Dimensional Tolerances (Clause 6.2):

  Location	Tolerance
  Tool head fitting area	+3 mm / -0 mm
  Other places	± 2 mm

• Rounding Off (Clause 0.5):

  • Test results must be rounded off per IS 2-1960.
  • Retain the same number of significant digits as specified values.

Summary Diagram: Dimensional Tolerances on Handle

graph LR
A[Handle Diameter] --> B[Head Fitting Area: +3mm / -0mm]
A --> C[Other Areas: ±2mm]

This ensures proper fit and quality control in manufacturing per IS 2891 standards.

IS 2891 Testing Requirements: Key Points

• Rounding of Test Results:
  As per IS 2-1960, test results must be rounded off to the same number of significant figures as specified in the standard. This ensures consistency in reporting.

• Test Requirements Inclusion:
  The revised IS 2891 includes specific test requirements for axes (tools), focusing on mechanical properties and dimensional tolerances.

• Tolerance on Handle Length:
  Some permissible tolerances are allowed on handle lengths to accommodate manufacturing variations without compromising performance.

General Testing Guidelines (Typical for IS 2891 axes):

Notes:

• Tests ensure axes meet strength, durability, and safety criteria.
• Follow IS 2 for rounding test results.
• Always refer to the latest IS 2891 edition for detailed test procedures.

flowchart LR
    A[Start: Axis Sample] --> B{Perform Tests}
    B --> C[Hardness Test]
    B --> D[Impact Test]
    B --> E[Dimensional Check]
    B --> F[Visual Inspection]
    C --> G{Pass?}
    D --> G
    E --> G
    F --> G
    G -->|Yes| H[Accept Sample]
    G -->|No| I[Reject Sample]

This summarizes the testing framework per IS 2891 with emphasis on rounding, tolerances, and test types.

IS 2891 refers to handles, with sampling and conformity linked to IS 620-1975.

Key Points on Sampling and Conformity (from IS 620-1975):

• Sampling Method: Representative samples must be drawn randomly from batches to ensure uniformity.
• Criteria for Conformity:
  • Samples are tested for workmanship, finish, and permissible defects.
  • Acceptance or rejection is based on the number of defective samples compared to acceptance quality levels (AQL).
• Workmanship & Finish:
  • Permissible defects are defined and samples exceeding limits lead to batch rejection.
• Rounding Off Results (IS 2-1960):
  • Test results are rounded to the same decimal places as the specified values.
  • Ensures consistency in reporting and decision-making.

Summary Table for Sampling (Typical AQL Concept):

Note: Refer IS 620-1975 for exact sampling plans.

flowchart TD
    A[Batch of Handles] --> B[Random Sampling]
    B --> C{Test Samples}
    C -->|Defects ≤ Acceptance Number| D[Batch Accepted]
    C -->|Defects > Acceptance Number| E[Batch Rejected]

References:

• IS 2891 (Handles)
• IS 620-1975 (Sampling & Defects)
• IS 2-1960 (Rounding Off)

IS 2891 - Marking Specifications for Axe Handles

Key Marking Requirements (Clause 10.1)

• Each handle must be legibly and indelibly marked with:
  • Manufacturer's name, initials, or recognized trademark
  • Name of timber species
  • Year of manufacture
  • Type of axe (using the codes below)

Additional Marking (Clause 10.1.1)

• The handle may also carry the ISI Certification Mark, indicating compliance with ISI quality and inspection standards.

Notes:

• Marking must be clear and permanent.
• Rounding of test results should follow IS : 2-1960 guidelines for significant figures.

flowchart TD
    A[Handle] --> B{Marking}
    B --> C[Manufacturer's name/trademark]
    B --> D[Timber species]
    B --> E[Year of manufacture]
    B --> F[Axe type code]
    B --> G[Optional: ISI Certification Mark]

This ensures traceability, quality, and standard compliance of axe handles per IS 2891.

IS 2891: Treatment of Green Blanks – Key Points

Treatment Procedure (Appendix A, Clause 4.2)

• Size Preparation: Convert green blanks close to final handle shape and dimensions, allowing oversize for shrinkage and finishing.
• Chemical Soaking:
  • Immerse immediately in either:
    • 40% (w/w) Polyethylene Glycol (PEG)-1500 solution, or
    • 60% (w/w) Urea solution
  • Duration: ~24 hours.
• Post-Treatment Seasoning: Air- or kiln-season blanks until desired moisture content (8-15%) is reached.
• Final Finishing: Done after seasoning.

Moisture Content Requirements (Clause 4.1)

• Moisture content between 8% and 15%.
• Blanks must be free from pith, decay, checks, splits (except hair splits), borer holes, warp, and other defects per IS 620-1975.

Summary Table: Treatment of Green Blanks

This treatment prevents cracking and splitting by stabilizing moisture gradients during drying.

flowchart TD
    A[Green Blanks] --> B[Size to near final dimensions]
    B --> C[Immerse in 40% PEG-1500 or 60% Urea (24 hrs)]
    C --> D[Air or kiln seasoning to 8-15% moisture]
    D --> E[Final finishing of handles]

References: IS 2891 Clause 4.2 & Appendix A, IS 620-1975 for defects and moisture limits.