Wooden handles for POWRAHS
1989 Edition

Overview of Scope & Essential Requirements for Wooden POWRAH Handles

• Scope: Defines specifications for wooden handles used with POWRAHS in accordance with IS 1759:1980, including timber selection, dimensions, tolerances, and quality benchmarks.

• Timber Species: As per IS 620:1985, detailing recommended timber types for handles prioritizing strength and durability.

• Dimensional Allowances (Clause 6.2):

  • Head fitting zone: +3 mm / -0 mm
  • Remaining sections: ±2 mm

• General Requirements: Compliance with IS 620:1985 standards for moisture content, grain alignment, finish quality.

• Rounding Off Protocol: Numerical values rounded per IS 2:1960 guidelines, preserving specified significant figures.

Dimensional Tolerances Summary

Related Standards

• IS 1759:1980 — POWRAHS Tool Specifications
• IS 620:1985 — General Wooden Handle Requirements
• IS 707:1976 — Timber Technology Terminology

flowchart TD
    A[Scope of IS 5942] --> B[Wooden Handles for POWRAHS]
    B --> C[Timber Species (IS 620)]
    B --> D[Dimensional Tolerances]
    D --> E[Head Fit: +3/-0 mm]
    D --> F[Other Areas: ±2 mm]
    B --> G[Quality per IS 620]
    B --> H[Rounding per IS 2]

This section ensures standardized quality and interchangeability for POWRAH wooden handles.

Key References Supporting IS 5942 for Wooden POWRAH Handles

• General requirements for wooden tool handles detailed in IS 620:1985, covering workmanship, acceptable defects, testing, treatment, moisture levels, and sampling.
• Handles must bear clear and permanent markings indicating the manufacturer’s name/trademark and production year.
• All measurements are expressed in millimeters.
• Permissible dimensional deviations (Clause 6.2):
  • Tool head interface: +3 mm / -0 mm
  • Other dimensions: ±2 mm
• Terminology defined as per IS 620:1985 and IS 707:1976.
• Compliance ensured through BIS quality control and inspection mechanisms.
• Rounding of results follows IS 2:1960 directives.

This standard undergoes periodic updates by BIS to maintain quality assurance.

flowchart LR
    A[IS 5942: Wooden Handles] --> B[IS 620:1985 - General Norms]
    A --> C[IS 707:1976 - Timber Terminology]
    A --> D[IS 1759:1980 - POWRAHS Tools]
    B --> E[Workmanship, Defects, Testing]
    B --> F[Sampling & Moisture Control]
    A --> G[Marking & Dimensional Standards]
    G --> H[Tolerances: +3/-0 mm (head), ±2 mm (others)]

Summary: IS 5942 refers extensively to IS 620 for detailed requirements, specifying tolerances and marking in line with BIS regulations.

Terminology and Definitions Under IS 5942

• Scope: Wooden handles intended for POWRAHS as per IS 1759:1980.
• Definitions: Adopted from IS 620:1985 (general wooden handle requirements) and IS 707:1976 (timber technology glossary).
• Timber Species: Updated list provided in clause 4 of IS 5942.
• Workmanship and Defects: Conformance to IS 620:1985 regarding finish, allowable defects, testing, treatment, and moisture parameters.
• Marking: Each handle must be clearly marked with the manufacturer’s name/trademark and year of manufacture.
• Sampling and Acceptance: Sampling procedures and conformity benchmarks as per IS 620:1985.
• Dimensional Units: All sizes specified in millimeters; geometry detailed in IS 5942’s Fig. 1.

Key Parameters from IS 620:1985

flowchart LR
    A[Timber Selection] --> B[Species Approval]
    B --> C[Shaping & Finishing]
    C --> D[Inspection for Defects]
    D --> E{Defects Acceptable?}
    E -- Yes --> F[Marking & Packaging]
    E -- No --> G[Rework or Reject]

For exact dimensions and formulas, consult IS 5942 Fig. 1 and IS 620 clauses.

IS 5942 (1989) — Timber Species Suitable for POWRAHS Wooden Handles

Core Requirements (Clause 4)

• Timber Type: Handles must utilize timber categorized under Class IV handles in IS 620:1985.
• Moisture Level: Use well-seasoned timber, preferably air-dried, with moisture content not exceeding 15%.
• Grain Orientation: Straight grain with a maximum inclination of 1 in 20.
• Prohibited Defects:
  • Presence of central pith
  • Any decay or rot
  • Infestation by insects or borers
  • Brittle (brash) wood
  • Checks and shakes, except minor hairline cracks
  • Splits and warping
  • Undesirable knots and sapwood (exceptions as per IS 620:1985)
  • Any other defect impairing longevity or utility

Representative Class IV Timber Species (from IS 620:1985)

flowchart TD
    A[Timber for Handles] --> B[Class IV Timber (IS 620)]
    B --> C[Moisture ≤ 15%]
    B --> D[Straight Grain ≤ 1:20]
    B --> E[No Prohibited Defects]
    E --> F[No Pith/Decay]
    E --> G[No Insect Damage]
    E --> H[No Brittle Wood/Checks]
    E --> I[No Splits or Warps]
    E --> J[No Objectionable Knots/Sapwood]

Refer to IS 620:1985 for comprehensive species listings and mechanical property details.

Manufacturing and Treatment Guidelines per IS 5942

Essential Criteria:

• Moisture Content: Wood blanks must be well-seasoned, ideally air-seasoned, with moisture not exceeding 15% (Clause 4.2).
• Grain: Should exhibit fairly straight grain with inclination less than or equal to 1 in 20.
• Prohibited Defects: No presence of pith, decay, insect damage, brittleness, checks (except minor hair cracks), splits, warping, or objectionable knots and sapwood as per IS 620:1985.
• Marking: Each handle requires legible marking of the manufacturer's name/trademark and year.

Treatment Procedure (Clause 5.2):

• After inspection, approved handles must be immersed in hot raw linseed oil at approximately 90°C for 1 hour.
• Following soaking, handles should be allowed to drain and then wiped dry with a clean cloth.

Treatment Process Summary

flowchart TD
    A[Inspection] --> B[Soak in hot linseed oil (90°C) for 1 hour]
    B --> C[Drain handles]
    C --> D[Wipe dry with cloth]
    D --> E[Apply markings]

This treatment enhances the handle’s resistance to moisture, wear, and extends service life.

Dimensions and Allowable Deviations for Wooden Handles (IS 5942)

Specifications:

• Dimensions: Detailed in Fig. 1 of IS 5942 (refer to the standard document for precise measurements).
• Units: All dimensions are specified in millimeters (mm).

Permissible Tolerances (Clause 6.2):

Additional Notes:

• Post-inspection, handles must undergo hot linseed oil soaking (~90°C) for 1 hour (Clause 5.2).
• Markings must include manufacturer's identity and production year.
• Quality aspects like workmanship and allowable defects conform with IS 620:1985.

Summary Table

graph TD
    A[Wooden Handle] --> B[Dimensions per Fig. 1]
    A --> C[Tolerances]
    C --> D[Head Fit: +3/-0 mm]
    C --> E[Other Areas: ±2 mm]
    A --> F[Post-Inspection Treatment]
    F --> G[Soak in hot linseed oil (90°C) for 1 hour]
    A --> H[Marking]
    H --> I[Manufacturer ID & Year]

Refer to IS 5942 Fig. 1 for exact dimensional details and IS 620 for quality assurance.

Summary of Other Key Requirements in IS 5942

Dimensional Tolerances (Clause 6.2)

• Tool head fit: +3 mm / -0 mm
• All other locations: ±2 mm

Workmanship and Surface Finish (Clause 4.2)

• Compliance with IS 620:1985 for workmanship quality
• Permitted defects as outlined additionally in IS 5942
• Testing, treatment, and moisture content standards
• Sampling and acceptance criteria

Marking Requirements

• Handles must bear clear and permanent markings including:
  • Manufacturer’s name, initials, or trademark
  • Year of manufacture

Measurement Units

• All sizes expressed in millimeters (mm)

Related Standards

• IS 620:1985 — General requirements for wooden tool handles
• IS 1759:1980 — Specifications for POWRAHS
• IS 707:1976 — Glossary of timber technology terms

Notes:

• Handles are subject to BIS quality control and inspection protocols.
• Use of Standard Mark is regulated under the Bureau of Indian Standards Act, 1986.

flowchart LR
    A[IS 5942: Other Requirements] --> B[Tolerances]
    B --> B1[Tool head fit: +3/-0 mm]
    B --> B2[Other areas: ±2 mm]
    A --> C[Workmanship & Finish]
    C --> C1[Compliance with IS 620:1985]
    A --> D[Marking]
    D --> D1[Manufacturer & Year]
    A --> E[Units]
    E --> E1[Dimensions in mm]

Refer to IS 620:1985 for tests, defect limits, and sampling details.

Marking Criteria for Wooden Handles as per IS 5942

Specification (Clause 4.2):

• Every handle shall be distinctly and permanently marked with:
  • Manufacturer’s name, initials, or registered trademark
  • The year of manufacture
• Markings serve to ensure traceability and maintain quality standards.

Additional Details:

• Markings must be clear and durable.
• Dimensions related to handles are expressed in millimetres (mm).
• Handles should adhere to workmanship, defect tolerance, and moisture content standards of IS 620:1985.
• Sampling and conformity criteria also follow IS 620:1985.

Permissible Tolerances (Clause 6.2):

Post-Inspection Treatment (Clause 5.2):

• Handles approved after inspection must be soaked in hot raw linseed oil (~90°C) for 1 hour.
• Subsequently drained and wiped dry.

Marking Specifications Summary

flowchart TD
    A[Manufacture Handle] --> B[Apply Manufacturer & Year Marking]
    B --> C[Inspection & Sampling (IS 620:1985)]
    C --> D{Accepted?}
    D -- Yes --> E[Soak in Hot Linseed Oil (90°C, 1 hr)]
    E --> F[Drying & Dispatch]
    D -- No --> G[Reject or Rectify]

This ensures compliance with IS 5942 for marking, quality, and durability.

Sampling and Acceptance Guidelines for POWRAH Handles (IS 5942)

• Sampling and conformity are governed by IS 620:1985, which outlines general criteria for wooden tool handles.

• Key Points from IS 620:1985:

  • Representative samples are extracted from production batches.
  • Conformity criteria include workmanship, acceptable defects, moisture content, and treatment adherence.
  • Each handle must bear clear, indelible marks with manufacturer’s identity and year.

• Dimensional Tolerances (IS 5942 Clause 6.2):

  • Tool head fit: +3 mm / -0 mm
  • Other areas: ±2 mm

• Workmanship and Finish: Must meet IS 620:1985 standards, including defect limits and testing.

Tolerance Summary Table

Marking Requirements

• Manufacturer’s name, initials, or trademark
• Year of manufacture
• Markings must be permanent and legible

Note:

For detailed sampling plans, acceptance thresholds, and testing methods, consult IS 620:1985 directly.

flowchart LR
    A[Production Batch] --> B[Sample Selection]
    B --> C{Testing}
    C -->|Pass| D[Batch Accepted]
    C -->|Fail| E[Batch Rejected or Reworked]

This protocol guarantees quality control and adherence to Indian Standards.