Wooden handles for hand hammers-

IS 4953 Scope – Key Specifications and Tables

• Scope: Covers dimensions and tolerances for wooden handles of hand hammers.
• Reference Standards:
  • IS 841: 1983 (Steel hammers)
  • IS 6546: 1972 (Types of hammers)
  • IS 620: 1985 (Wooden handles general requirements)

Key Table: Dimensions of Wooden Handles (Clause 5.1 & Table 1)

(Refer to full table in IS 4953 for all sizes and hammer types)

Tolerances (Clause 6.2)

• Dimensions A, B, E, F: ±3 mm
• All other dimensions: ±2 mm

Marking (Clause 9.1)

• Handles must be legibly marked with manufacturer’s name/trademark and year of manufacture.

flowchart LR
    A[Wooden Handle Dimensions] --> B{Hammer Type}
    B --> C[Ball Pein]
    B --> D[Cross Pein]
    B --> E[Double Face Sledge]
    C --> F[Weight 100g to 1kg]
    D

IS 4953: Wooden Handles for Hand Hammers — Key References & Specifications

1. Dimensions (Clause 5.1 & Table 1)

• Lengths: 300 mm to 900 mm depending on hammer type and weight.
• Dimensions labeled A, B, C, D, E, F, G, H specify handle cross-section and grip sizes.
• Example for Engineer’s ball pein 100 g (Length 300 mm):
  • E = 10 mm, F = 15 mm, A = 15 mm, B = 20 mm, C = 10 mm, D = 15 mm, G = 57 mm, H = 57 mm

2. Tolerances (Clause 6.2)

• On dimensions A, B, E, F: ±3 mm
• On all other dimensions: ±2 mm

3. Related Indian Standards (Clause 2.1 & Annex A)

• IS 620:1985 — Wooden handles, general requirements
• IS 707:1976 — Timber technology glossary
• IS 841:1983 — Steel hammers specification
• IS 6546:1972 — Claw hammers specification

Summary Table Extract (Dimensions in mm)

This ensures proper

IS 4953: Definitions & Key Specifications for Wooden Handles of Hand Hammers

1. Definitions (Clause 3.1)

• Definitions follow IS 620:1985 (Wooden handles general requirements) and IS 707:1976 (Glossary of timber terms).

2. Dimensions of Wooden Handles (Clause 5.1 & Table 1)

• Handle dimensions vary by hammer type and weight.
• Key dimensions (in mm) include:
  • A, B, C, D, E, F, G, H
• Length varies typically from 300 mm to 900 mm depending on hammer weight/type.

(Refer to full Table 1 for detailed sizes)

3. Tolerances (Clause 6.2)

• On dimensions A, B, E, F: ±3 mm
• On all other dimensions: ±2 mm

4. Related Standards (Clause 2.1)

• IS 620:1985 — Wooden handles specification
• IS 707:1976 — Timber terminology
• IS 841:1983 — Steel hammers specification
• IS 6546:1972 — Claw hammers specification

Summary Diagram of Handle Dimensions (simplified):

flowchart LR
    HammerType["Hammer Type & Weight"]
    Length["Handle Length (300-900 mm)"]
    Dimensions["Dimensions (A, B, C, D, E, F, G, H)"]
    Tolerances["Tolerances ±2 to 3 mm"]
    Standards

IS 4953: Species of Timber for Hammer Handles

• Reference Standards:

  • IS 620:1985 (Wooden handles specification)
  • IS 707:1976 (Timber glossary)

• Species Selection (Clause 4.1):
  Handles must be made from timber species classified under Class 1, 2, or 3 in IS 620:1985, based on handle length.

• Timber Quality Requirements (Clause 4.2):

  • Moisture content ≤ 15% (preferably air-seasoned)
  • Grain inclination ≤ 1 in 20 (fairly straight-grained)
  • Free from:
    • Centre heart (pith)
    • Decay, rot, borer/insect attack
    • Brashness, checks, shakes (except minor hair cracks)
    • Splits, warp, objectionable knots, sapwood (except as permitted in IS 620)
  • No defects that reduce handle life or utility

Typical Timber Classes in IS 620:1985 (Summary)

(Refer IS 620 for detailed species and classification)

flowchart TD
    A[Select Timber Species] --> B{Length of Handle}
    B -->|≤350 mm| C[Class 1 Species]
    B -->|351-450 mm| D[Class 2 Species]
    B -->|>450 mm| E[Class 3 Species]
    C & D & E --> F[Check Moisture ≤ 15%]
    F --> G[Check Grain Inclination ≤ 1 in 20]
    G --> H[Inspect for Defects]
    H --> I[Accept or Reject Timber]

Summary: Use well-seasoned, defect-free timber from IS 620 classes matching handle length, ensuring durability and performance.

IS 4953 - Manufacture of Wooden Handles: Key Points

1. Handle Manufacture (Clauses 5.1 & 5.2)

• Handles are made from selected blanks shaped as per Fig. 1 and sized per Table 1.
• After inspection, accepted handles must be soaked in hot raw linseed oil (~90°C) for 1 hour, drained, then wiped dry.

2. Dimensions & Tolerances (Clause 6.1)

• Handles must conform to dimensions in Table 1, matching hammer types per IS 841:1983 and IS 6546:1972.

3. Table 1: Dimensions of Wooden Handles for Hand Hammers

IS 4953: Dimensions & Tolerances for Wooden Handles of Hand Hammers

1. Permissible Tolerances (Clause 6.2)

• On dimensions A, B, E, F (see Fig. 1):
  ±3 mm
• All other dimensions:
  ±2 mm

2. Key Dimensions (Clause 5.1 & Table 6.1)

Refer to Table 6.1 for complete dimensions based on hammer type and weight.

3. Additional Requirements

• Handles must be soaked in hot (~90℃) raw linseed oil for 1 hour post-inspection (Clause 5.2).
• Dimensions must conform strictly to Table 1 and Fig. 1 sketches.

4. Summary Diagram

graph LR
A[Dimension A] -->|±3 mm| Handle
B[Dimension B] -->|±3 mm| Handle
E[Dimension E] -->|±3 mm| Handle
F[Dimension F] -->|±3 mm| Handle

IS 4953 - Other Requirements Summary

1. Permissible Tolerances (Clause 6.2)

• Dimensions A, B, E, F (Fig. 1):
  +3 mm (selected tolerance)
• All other dimensions:
  ± 2 mm

2. Wooden Handle Dimensions for Hand Hammers (Clause 5.1, Table 6.1)

Refer IS 841:1983 & IS 6546:1972 for detailed hammer types.

3. Referenced Standards (Clause 2.1)

• IS 620:1985 - Wooden Handles Specification

IS 4953: Sampling and Criteria for Conformity

• Sampling Method: As per IS 620:1985 — representative samples must be drawn following the prescribed statistical sampling plans to ensure unbiased quality checks.

• Dimensional Tolerances (Clause 6.2):

  • On dimensions A, B, E, F (Fig. 1): ±3 mm
  • All other dimensions: ±2 mm

• Criteria for Conformity:

  • Samples must meet dimensional tolerances.
  • Marking (Clause 9.1): Each handle shall be legibly marked with manufacturer’s name/trademark and year of manufacture.

• Standard Mark Use:

  • Indicates compliance with IS 4953 under BIS supervision.
  • Continuous quality control and inspection by BIS.

Summary Table: Dimensional Tolerances

Key Reference:

• IS 620:1985 — Sampling procedures and acceptance criteria for batch conformity.

flowchart LR
    A[Batch of Handles] --> B[Sampling as per IS 620]
    B --> C{Check Dimensions}
    C -->|Within Tolerance| D[Accept Batch]
    C -->|Outside Tolerance| E[Reject/Retest Batch]
    D --> F[Mark Handles as per Clause 9.1]

This ensures product quality and compliance with IS 4953.

IS 4953 - Marking (Clause 9.1)

Key Specifications for Marking:

• Marking Requirements:
  Each handle shall be legibly and indelibly marked with:

  • Manufacturer's name, initials, or recognized trademark
  • Year of manufacture

• Standard Mark Usage:

  • Governed by the Bureau of Indian Standards Act, 1986
  • Indicates compliance with IS 4953 under BIS inspection and quality control
  • Continuous conformity checks by BIS

• Licensing:

  • Manufacturers must obtain a license from BIS to use the Standard Mark
  • Details available from BIS regional offices

Summary Table for Marking Requirements

Additional Notes:

• Marking must withstand handling and environmental exposure.
• Refer to IS 620:1985 for sampling and conformity criteria.
• BIS offices handle licensing and copyright permissions.

flowchart LR
    A[Manufacturer] --> B[Mark Handle]
    B --> C{Marking Content}
    C --> D[Name/Initials/Trademark]
    C --> E[Year of Manufacture]
    B --> F[Legible & Indelible]
    F --> G[Complies with IS 4953]
    G --> H[BIS Licensing & Inspection]

For further details, contact BIS regional offices as per IS 4953 Annex.