mason's mallets

Scope of IS 6642 (Mason's Mallets)

• Purpose: Specifies requirements for wooden mallet heads used by masons.

• Timber Species: Clause 3.1(a) lists suitable timber species for mallet heads, including:

  Botanical Name	Trade Name
  Acacia nilotica	Babul
  Albizia lebbeck	Kokko
  Chloroxylon swietenia	Satinwood
  Dalbergia sissoo	Sissoo
  Shorea robusta	Sal
  Tectona grandis	Teak
  Xylia xylocarpa	Irul
  ...	...

• Units: The standard uses SI units (metre, kilogram, second, etc.) for all measurements.

• Sampling & Conformity: Sampling and conformity criteria follow Appendix G of IS 620-1985.

• Definitions: Refer IS 707-1968 for timber-related terminology.

Key Notes:

• Use durable, hard timber species listed for mallet heads.
• Follow SI units strictly for measurements.
• Sampling and quality checks per IS 620-1985 Appendix G.

flowchart LR
    A[IS 6642 Scope] --> B[Timber Species List]
    A --> C[SI Units for Measurement]
    A --> D[Sampling & Conformity (IS 620-1985)]
    A --> E[Definitions (IS 707-1968)]

This ensures mallets meet durability and quality standards for masonry work.

IS 6642 - Key References & Specifications

1. Timber Species for Mallet Heads (Clause 3.1 (a))

• Commonly used species include:
  • Acacia nilotica (babul)
  • Albizia lebbeck (kokko)
  • Dalbergia sissoo (sissoo)
  • Tectona grandis (teak)
  • Shorea robusta (sal)
  • Plus 28 species listed for durability and strength.

2. Units and Symbols (SI Units)

• 1 N = 1 kg·m/s²
• 1 Pa = 1 N/m²

3. Related Indian Standards

• IS 707-1968: Definitions for timber and timber products.
• IS 620-1985 (Appendix G): Sampling and conformity for mason's mallets.
• IS 6642 references general requirements for wooden tool handles.

Summary Diagram: Mallet Head Timber Selection Process

flowchart TD
    A[Select Timber Species] --> B{Check IS 6642 List}
    B -->|Yes| C[Use Recommended Species]
    B -->|No| D[Reject or Verify Properties]
    C --> E[Check Dimensions & Quality]
    E --> F[Manufacture Mallet Head]

Note: Refer to IS 6642 for detailed specifications on dimensions, quality, and sampling procedures.

IS 6642 - Definitions & Key Specifications Summary

1. Definitions:

• Refer to IS 707:1968 for timber and timber product terminology.
• Rounding off numerical values follows IS 2:1960 rules.
• The standard includes updated timber species based on research.

2. Timber Species for Mallet Heads (Clause 3.1(a)):

(Full list includes 28 species suitable for mallet heads.)

3. Units & Symbols (SI Units):

Key Notes:

• Use IS 707 for detailed timber definitions.
• Rounding off values per IS 2:1960 ensures consistency.
• Timber species listed are recommended for mallet heads due to strength and durability.

flowchart TD
    A[IS 6642 Definitions] --> B[Refer IS 707:1968]
   

IS 6642: Materials and Manufacture - Key Points

1. Timber Species for Mallet Heads (Clause 3.1 (a))

Preferred species for mallet heads include:

These species are selected for durability, hardness, and shock resistance.

2. Manufacturing Tolerances (Clause 5.2)

• Head fit tolerance: ±3 mm
• Other parts: Normal manufacturing tolerances apply.

3. Workmanship and Finish (Clause 6)

• Mallet heads and handles should be smoothly finished, free from defects like knots or cracks.
• Proper joining to ensure durability.

4. Units and Definitions

• Force: 1 N = 1 kg·m/s²
• Pressure/Stress: 1 Pa = 1 N/m²

Summary Table: Timber Properties (Typical)

graph LR
A[Selected Timber Species] --> B[Manufacturing]
B --> C[Tolerances: ±3 mm head fit]
B --> D[Workmanship & Finish]
D --> E[Smooth surface, no defects]

Note: Refer to IS 620

IS 6642: Dimensions and Tolerances for Wooden Mallets

Key Specifications:

• Dimensions: As per Fig. 1 (typical mallet dimensions not provided here, refer to IS 6642 Fig.1 for exact sizes).
• Tolerances:
  • Where the head fits on handle: +3 mm
  • Other places (normal manufacturing): As per Clause 5.2 (exact values not fully provided here, but typically ±1 to 3 mm depending on part)
• Workmanship: Handle must be snugly fitted to the head (Clause 4.3).

Timber Species for Mallet Heads (Clause 3.1a):

Common hardwoods such as:

• Acacia nilotica (babul)
• Albizia spp. (kokko, kala siris, safed siris)
• Dalbergia sissoo (sissoo)
• Shorea robusta (sal)
• Tectona grandis (teak)
• Others listed in Clause 3.1(a).

Units:

• Length in millimeters (mm) or meters (m)
• Force in newtons (N)
• Stress in pascals (Pa)

Summary Table: Tolerances

Practical Notes:

• Ensure snug fit of handle and head to avoid loosening.
• Use specified timber species for durability.
• Follow IS 6642 Fig. 1 for exact mallet dimensions.

flowchart LR
    A[Mallet Head] -->|Fits on| B[Handle]
    B -->|Snug fit| A
    A & B --> C[Overall Dimensions]
    C --> D[Tolerances +3 mm at head fit]
    C --> E[Normal manuf. tolerances elsewhere]

For detailed dimensions, refer to IS 6642 Fig. 1 and full Clause 5.1.

IS 6642: Workmanship and Finish for Mason's Mallets

Key Specifications (Clause 6)

• Surface Finish: Mallet shall be properly shaped and smoothly finished all over.
• Jointing: Brazing or welding of bands must be clean and sound.
• Tolerances (Clause 5.2):
  • Head fit tolerance: ±3 mm
  • Other places: Normal manufacturing tolerances apply.

Timber Species for Mallet Heads (Clause 3.1)

(Refer to Clause 3.1 for full list)

Summary Table: Tolerances for Mason's Mallet

Additional Notes

• Finish quality ensures durability and user comfort.
• Proper brazing/welding prevents band loosening.
• Sampling and conformity per IS 620:1985 Appendix G.

flowchart TD
    A[Mallet Head] -->|Fit Tolerance ±3mm| B[Head Band]
    B --> C{Joint Quality}
    C -->|Clean & Sound| D[Accept]
    C -->|Defective| E[Reject]

For detailed dimensions and sampling, refer to IS 6642 and IS 620-1985.

IS 6642 - Testing of Mason's Mallets: Key Points

• Sampling Method:
  Refer to Appendix G of IS 620:1985 for drawing representative samples and conformity criteria of mason's mallets.

• Rounding Off Values:
  Follow IS 2:1960 for rounding off test results to the same significant figures as specified values.

• Timber Species:
  Use species listed in Clause 3.1(a) for mallet heads, e.g., Acacia nilotica, Tectona grandis, Dalbergia sissoo, etc.

• Units:
  Use SI units as per the standard (e.g., Length in meters, Force in Newtons, Stress in Pascals).

Summary Table: Sampling & Testing Reference

Additional Notes:

• Testing typically involves mechanical strength, durability, and dimensional checks.
• Use timber species with adequate hardness and toughness for mallet heads.
• Ensure consistent test procedures for repeatability.

flowchart LR
    A[Select Timber Species] --> B[Sample Drawing (IS 620:1985)]
    B --> C[Testing Procedure]
    C --> D[Result Calculation]
    D --> E[Rounding off (IS 2:1960)]
    E --> F[Conformity Decision]

This concise framework ensures compliance with IS 6642 testing requirements.

IS 6642: Preservation and Treatment of Timber - Key Points

The provided context lacks direct formulas or treatment specifications. Based on standard timber preservation practices aligned with IS codes and general engineering knowledge:

Key Specifications for Timber Preservation

• Timber Species for Tool Handles & Mallet Heads (Clause 3.1(a)):

  • Includes durable species like Acacia nilotica, Albizia lebbeck, Dalbergia sissoo, Tectona grandis (teak), Shorea robusta (sal), etc.

• Preservation Methods (General IS practice):

  • Pressure Treatment: Using preservatives like CCA (Chromated Copper Arsenate), creosote under pressure for deep penetration.
  • Surface Treatment: Application of preservatives by brushing, dipping, or spraying.
  • Seasoning: Proper drying to moisture content ~12-15% before treatment.

Typical Formulas (General)

• Retention of preservative (kg/m³):
  [ \text{Retention} = \frac{\text{Amount of preservative absorbed (kg)}}{\text{Volume of timber (m}^3)} ]

• Volume of timber (m³):
  [ V = L \times B \times H ] where L = length, B = breadth, H = height (all in meters).

Units (from IS 6642)

Summary Diagram: Timber Preservation Process

flowchart LR
    A[Select Suitable Timber Species] --> B[Seasoning (Drying)]
    B --> C[Preservative Application]
    C --> D{Method}
    D -->|Pressure Treatment| E[Deep Penetration]
    D -->|Surface Treatment| F[Brushing/Dipping/Spraying]
    E --> G[Drying & Storage]
    F --> G

Note: For detailed preservative retention values, treatment duration, and chemical concentrations, refer to IS 401 (preservative treatment of

IS 6642 - Packing of Mason's Mallets

Key Specification (Clause 9.1)

• Packing: Mallets must be securely tied and packed in gunny cloth.
• Packaged in convenient lots for easy handling during transit.

Timber Species for Mallet Heads (Clause 3.1(a))

Preferred species include:

• Acacia nilotica (babul)
• Albizia lebbeck (kokko)
• Chloroxylon swietenia (satinwood)
• Dalbergia sissoo (sissoo)
• Tectona grandis (teak)
• ...and others listed in Clause 3.1(a).

Additional Notes

• Use durable, seasoned hardwood for mallet heads.
• Handles should conform to IS standards for wooden tool handles.
• Sampling and conformity criteria follow IS 620:1985 Appendix G.

Summary Table: Packing Requirements

flowchart LR
    A[Mallets] --> B[Securely tied]
    B --> C[Packed in Gunny Cloth]
    C --> D[Grouped in Convenient Lots]
    D --> E[Easy Handling in Transit]

For detailed sampling and conformity, refer IS 620:1985 Appendix G.

IS 6642: Sampling and Criteria for Conformity

• Sampling Method:
  As per Clause 10.1, the sampling of mason's mallets shall follow the procedure prescribed in Appendix G of IS 620-1985. This involves drawing representative samples ensuring randomness and representativeness.

• Criteria for Conformity:
  The sampled mallets must meet the specifications laid out in IS 6642 and IS 620-1985, including dimensions, material quality, and workmanship.

• Timber Species for Mallet Heads (Clause 3.1(a)):
  Key species include:

  • Acacia nilotica (babul)
  • Albizia lebbeck (kokko)
  • Chloroxylon swietenia (satinwood)
  • Dalbergia sissoo (sissoo)
  • Shorea robusta (sal)
  • Tectona grandis (teak)
  • Xylia xylocarpa (irul)
    (Refer to full list in Clause 3.1(a))

Sampling Plan (General Reference from IS 620-1985 Appendix G)

• Acceptance Number (c): Maximum number of defective items allowed in the sample for the lot to be accepted.

Key Points:

• Sampling ensures quality control without testing every item.
• Conformity criteria include dimensional checks, material species, and workmanship.
• Use SI units for all measurements (e.g., length in meters, mass in kg).

flowchart TD
    A[Lot of Mason's Mallets] --> B[Draw Representative Sample (Appendix G, IS 620-1985)]
    B --> C{Check Conformity}
    C -->|Pass| D[Accept Lot]
    C -->|Fail| E[Reject Lot]

For detailed sampling procedures and acceptance criteria, refer

IS 6642: Marking of Mason's Mallets

Clause 11.1.1 specifies that mallets may be marked with the ISI Certification Mark, ensuring compliance with the Indian Standards under strict inspection and quality control by ISI.

Key Points on Marking:

• ISI Certification Mark: Indicates the product meets IS 6642 requirements.
• Usage governed by: Indian Standards Institution (Certification Marks) Act.
• Marking assures:
  • Compliance with the standard.
  • Continuous quality surveillance by ISI.
• Manufacturers need: Licensing from ISI for mark usage.

Additional Relevant Info:

• Sampling & conformity: Refer IS 620:1985 Appendix G for sampling methods and conformity criteria.
• Timber species for mallet heads (Clause 3.1(a)) include:
  • Acacia nilotica (Babul)
  • Dalbergia sissoo (Sissoo)
  • Tectona grandis (Teak)
  • Chloroxylon swietenia (Satinwood), etc.

Summary Table: Marking Requirements

This marking ensures traceability and quality assurance for mason's mallets per IS 6642.