wooden handles for shovels

IS 2897: Scope - Key Specifications & Tolerances

Scope:
IS 2897 covers general requirements for wooden tool handles, harmonized with international practices and Indian field conditions.

Key Tolerances (Clause 5.2)

Rounding Off (Clause 0.4)

• Final values (test/analysis) must be rounded per IS 2-1960.
• Number of significant digits in the rounded value = number in the specified value.

Marking (Clause 8.1.1)

• Handles may bear the ISI Certification Mark.
• ISI Mark ensures compliance with quality, inspection, and testing norms.

Units (SI Units)

This standard aligns with related IS codes for wooden tool handles and accessories, ensuring dimensional accuracy and quality assurance.

IS 2897 - Definitions & Key Specifications Summary

1. Definitions:

• As per Clause 2.0, definitions follow IS 620:1975 (General requirements for wooden tool handles).
• Final values (test/analysis) must be rounded as per IS 2:1960 (Rounding off rules), retaining the same significant digits as specified.

2. Marking:

• Handles may carry the ISI Certification Mark (Clause 8.1.1).
• ISI mark ensures compliance with quality via inspection and testing under ISI supervision.

3. Units & Symbols (SI Units):

4. Related IS Codes for Wooden Handles:

• IS 620-1975: General wooden tool handles
• IS 2892-1980: Handles for picks and beaters
• IS 2893-1980: Handles for adzes
• IS 4953-1973: Handles for hand hammers
• And others listed for specific tools.

Rounding Off Rule (IS 2:1960)

• Round off the final calculated or observed value to the number of significant figures as in the specified value.
• Example: If specified value = 12.3 (3 significant figures), round off test result to 3 significant figures.

flowchart TD
    A[Test/Analysis Result] --> B{Round off?}
    B -- Yes --> C[Apply IS 2:1960 rounding rules]
    B -- No --> D[Use exact value]
    C --> E[Final value with same significant figures as specified]

Summary: IS 2897 defers to IS

IS 2897 – Species of Timber: Key Points

• Reference Standard: Definitions per IS 620-1975 (Timber for handles).

• Moisture Content: Timber must be well seasoned, preferably air-seasoned, with moisture content between 8% and 15%.

• Quality Requirements: Timber should be free from:

  • Centre heart (pith)
  • Decay (rot)
  • Checks, shakes, splits (except hair splits)
  • Borer holes
  • Warp or any defects reducing strength or utility

• Species Selection: IS 2897 does not list specific species but refers to IS 620-1975, which typically recommends durable, tough hardwoods like:

  • Shisham (Dalbergia sissoo)
  • Teak (Tectona grandis)
  • Neem (Azadirachta indica)
  • Sal (Shorea robusta)

Typical Properties for Handle Timber (per IS 620-1975)

Summary Diagram: Timber Selection Criteria

graph TD
A[Timber for Handles] --> B[Moisture Content 8%-15%]
A --> C[Free from Defects]
C --> D[No Pith]
C --> E[No Rot or Decay]
C --> F[No Checks, Shakes, Splits]
C --> G[No Borer Holes]
A --> H[Preferred Species]
H --> I[Shisham]
H --> J[Teak]
H --> K[Neem]
H --> L[Sal]

Use well-seasoned, defect-free hardwood species with controlled moisture for durable, strong timber handles per IS 2897 & IS 620.

IS 2897: Manufacture and Workmanship - Key Points

1. Workmanship and Finish (Clause 7.1)

• Follow IS 620-1975 for general requirements on wooden tool handles.
• Permissible defects and finish quality are as per IS 620-1975.
• Additional tests, treatment, and sampling also follow IS 620-1975.

2. Dimensional Tolerances (Clause 5.2)

3. Marking (Clause 8.1.1)

• Handles may carry the ISI Certification Mark.
• ISI mark ensures compliance with quality, inspection, and testing standards under ISI supervision.

4. Rounding Off (Clause 0.4)

• Final values from tests must be rounded off per IS 2-1960.
• Retain significant figures equal to those specified in the standard.

Summary Table for Tolerances

| Feature                  | Tolerance         |
|--------------------------|-------------------|
| Head fit area            | +3 mm / -0 mm     |
| Other areas              | ± 2 mm            |
| Length                   | ± 5 mm            |

Additional Reference

• For detailed workmanship and defect criteria, refer to IS 620-1975 (General requirements for wooden tool handles).

flowchart TD
    A[Manufacture & Workmanship] --> B[Workmanship & Finish]
    B --> C[IS 620-1975 Compliance]
    A --> D[Dimensional Tolerances]
    D --> E[Head fit: +3/-0 mm]
    D --> F[Other places: ±2 mm]
    D --> G[Length: ±5 mm]
    A --> H[Marking]
    H --> I[ISI Certification Mark]

This ensures quality and dimensional accuracy in wooden tool handles per IS 2897.

IS 2897: Dimensions and Tolerances for Handles

Key Specifications (Clause 5.2)

Dimensions (Clause 5.1)

• Handles must conform to dimensions shown in Fig. 1 and Fig. 2 of IS 2897 (refer to the standard for exact sizes).

Additional Notes

• Surface treatment: Immediately after manufacture, dip handles in raw linseed oil for at least 5 minutes to reduce moisture changes (Clause 4.2).
• Rounding off: Final test values should be rounded as per IS 2:1960 to maintain consistency with specified values.

Summary Table

This ensures dimensional accuracy and durability of tool handles as per IS 2897.

IS 2897 does not explicitly provide detailed formulas or tables for performance tests within the provided context. However, based on standard practices and related IS codes (like IS 620-1975 for workmanship), here are key points and general guidelines:

Performance Tests Key Points:

• Rounding off results: Final test values must be rounded as per IS 2:1960, retaining the same significant figures as specified.
• Workmanship & defects: Refer to IS 620-1975 for permissible defects and workmanship standards.
• Marking: Handles must bear the ISI Certification Mark per Clause 8.1.1, ensuring compliance.
• Sampling & testing: Follow sampling methods and test procedures outlined in related IS codes for wooden handles.

General Testing Parameters (from common practice):

Rounding Off (IS 2:1960):

• Round final values to the same decimal places as the standard requirement.
• Example: If standard specifies 2 decimal places, test result 3.456 → 3.46.

flowchart TD
    A[Start Performance Test] --> B{Measure Parameter}
    B --> C[Round off as per IS 2:1960]
    C --> D{Check Against Specified Limit}
    D -->|Pass| E[Mark with ISI Certification]
    D -->|Fail| F[Reject or Re-test]
    E --> G[End]
    F --> G

For detailed test procedures, consult IS 620-1975 and related IS codes listed in the context.

IS 2897 - Other Requirements Summary

1. Rounding Off (Clause 0.4):

   • Final test/analysis values must be rounded as per IS 2:1960.
   • Retain the same number of significant digits as the specified value.

2. Tolerances (Clause 5.2):

   Location	Tolerance
   Head of the tool fits	+3 mm / -0 mm
   Other places	± 2 mm
   Length	± 5 mm

3. Marking (Clause 8.1.1):

   • Handles may bear the ISI Certification Mark ensuring compliance with quality and inspection standards.

4. Units:

   • Use SI Units as per IS standards (e.g., Length in meters, Force in Newtons, Stress in Pascals).

Key Notes:

• Compliance is verified by rounding rules (IS 2:1960).
• Tolerances ensure dimensional accuracy for fit and function.
• ISI Mark guarantees product quality under Indian Standards.

flowchart TD
    A[Test/Analysis Value] --> B[Rounding as per IS 2:1960]
    B --> C[Compare with Specified Value]
    D[Tolerances] --> E[Head Fit: +3/-0 mm]
    D --> F[Other Places: ±2 mm]
    D --> G[Length: ±5 mm]
    H[Marking] --> I[ISI Certification Mark]
    I --> J[Quality Assurance]

This concise overview covers the "Other Requirements" section of IS 2897.

IS 2897: Marking Specifications for Wooden Tool Handles

Clause 8.1: Marking Requirements

• Each handle shall be legibly and indelibly marked with:
  • Manufacturer's name, initials, or recognized trade-mark
  • Year of manufacture
• Clause 8.1.1: Handles may also bear the ISI Certification Mark, indicating compliance with IS standards and quality control.

Key Points on Marking

Tolerances for Dimensions (Clause 5.2)

Notes on ISI Certification Mark

• Use governed by Indian Standards Institution (Certification Marks) Act.
• ISI mark ensures:
  • Compliance with IS 2897 and related standards.
  • Continuous quality inspection and testing.

Summary Diagram: Marking Flow

flowchart TD
    A[Handle Production] --> B[Mark Manufacturer Info]
    B --> C[Mark Year of Manufacture]
    C --> D{Use ISI Mark?}
    D -->|Yes| E[Apply ISI Certification Mark]
    D -->|No| F[No ISI Mark]
    E --> G[Quality Assurance by ISI]
    F --> G

For detailed licensing and ISI mark usage, contact the Indian Standards Institution.