Specification of pulaski tool for forest fire

IS 12853: Scope & Key Specifications Summary

• Scope: Specifies requirements for Pulaski tools used in forest fire fighting—primarily for clearing brush, small logs, and digging fire control lines.

• Material Conformity (Clause 9.1.2.4):

  • In absence of manufacturer’s certificate, one item per consignment must be individually tested for compliance.

• Marking (Clause 8.1):

  • Tools must bear nominal mass, manufacturer’s initials, and trade-mark.

• Dimensions & Tolerances (Clause 4.1):

  • As per Fig. 1 (refer IS 12853 for detailed dimensional specs).

• Quality Assurance:

  • Use of Standard Mark governed by BIS Act, ensuring continuous inspection and quality control.

Key Points for Compliance

Notes on Usage

• Ensure latest amendments are checked for updates.
• Follow IS 2:1960 for rounding off test results.
• Contact BIS for licensing and copyright details.

flowchart LR
    A[Manufacturing] --> B[Marking (Mass, Initials, Trademark)]
    B --> C[Quality Inspection]
    C --> D{Manufacturer's Certificate?}
    D -- Yes --> E[Accept Consignment]
    D -- No --> F[Test 1 Item Per Consignment]
    F --> G{Pass Test?}
    G -- Yes --> E
    G -- No --> H[Reject Consignment]

For detailed dimensions and tolerances, refer to Fig. 1 of IS 12853.

IS 12853 - Referenced Standards: Key Points & Specifications

1. Manufacturer's Certificate & Sampling (Clause 9.1.2.4):

• If no manufacturer certificate is available, one item per consignment must be individually tested to verify compliance with specifications.

2. Use of Standard Mark:

• Governed by BIS Act, 1986.
• Indicates compliance with Indian Standards under BIS supervision.
• Continuous quality checks by BIS ensure conformity.

3. Revision & Amendments:

• Indian Standards are periodically reviewed and amended.
• Users must ensure they have the latest edition or amendments.

4. BIS Contact & Regional Offices:

• Central Office: Manak Bhavan, New Delhi
• Regional Offices: Eastern (Calcutta), Northern (Chandigarh), Southern (Madras), Western (Mumbai)
• Branches across major cities for support.

Summary Table: Sampling & Certification

Notes on Implementation:

• Always verify material conformity with manufacturer’s certificate or by testing samples.
• Use the Standard Mark as assurance of product quality.
• Refer to IS 2:1960 for rounding off test results.

flowchart LR
    A[Material Consignment] --> B{Certificate from Manufacturer?}
    B -- Yes --> C[Accept Material]
    B -- No --> D[Sample One Item]
    D --> E[Test for Specification Compliance]
    E --> F{Pass?}
    F -- Yes --> C
    F -- No --> G[Reject Material]

This ensures compliance with IS 12853 requirements for materials and quality control.

IS 12853: Material Requirements Summary

1. Material Composition (Clause 3.1)

• Pulaski head steel: Fully-killed, plain carbon steel with:
  • Carbon: 0.72% to 0.93%
  • Manganese: 0.30% to 0.90%
  • Sulphur: ≤ 0.05%
• Hardness (Rockwell C scale):
  • Axe bit: 54 to 58 (extends 30 ± 5 mm from cutting edge)
  • Hoe end: 50 to 55 (extends 50 ± 5 mm from sharpened edge)
  • General steel hardness: ≤ 30

2. Sampling and Testing (Clause 9.1.2)

• Sampling size per lot (Table 1):

• Tests:
  • Visual inspection for requirements in clauses 3, 7, and 8.
  • Mass and performance tests: 1 sample per property.
  • Each sample must pass for lot conformity.

3. Manufacturer Certification (Clause 9.1.2.4)

• If no manufacturer certificate is available, test one item from each consignment individually.

This ensures material quality, mechanical properties, and consistent production under BIS supervision.

IS 12853: Dimensions and Tolerances for Pulaski Head

• Clause 4.1: Dimensions and tolerances are specified in Fig. 1 of the standard (not provided here). All dimensions are in millimeters.

• Surface Finish (Clause 7.1):

  • Head (except cutting edge): Average roughness ≤ 3 μm
  • Cutting edge: Average roughness ≤ 75 μm

• Material & Hardness (Clause 3.1):

  • Carbon: 0.72–0.93%
  • Manganese: 0.30–0.90%
  • Sulphur: ≤ 0.05%
  • Bit hardness (axe end): 54–58 HRC, extending 30 ± 5 mm from cutting edge
  • Hoe end hardness: 50–55 HRC, extending 50 ± 5 mm from edge
  • Rest of steel: ≤ 30 HRC

• Quality Control (Clause 9.1.2.4):

  • One item per consignment tested if manufacturer's certificate absent.

Typical Dimensions (from IS standards for Pulaski, approximate):

Summary Diagram (Conceptual Pulaski Head)

graph LR
A[Bit (Axe end)] --> B[Eye (Handle attachment)]
B --> C[Hoe end]
A -. Hardness 54-58 HRC .-> A
C -. Hardness 50-55 HRC .-> C
B -. Steel hardness ≤ 30 HRC .-> B

Note: Refer to Fig. 1 in IS 12853 for exact dimensions and tolerances. The above provides a concise overview of key dimensional and hardness requirements.

IS 12853: Mass Requirements for Pulaski Head

• Mass Specification (Clause 5.1):
  The Pulaski head mass = 1.70 ± 0.06 kg

• Material & Hardness (Clause 3.1):

  • Steel: Fully-killed plain carbon steel
  • Carbon: 0.72% to 0.93%
  • Manganese: 0.30% to 0.90%
  • Sulphur: ≤ 0.05%
  • Bit hardness (axe end): 54–58 HRC, extending 30 ± 5 mm from cutting edge
  • Hoe end hardness: 50–55 HRC, extending 50 ± 5 mm from sharpened edge
  • General steel hardness: ≤ 30 HRC

• Marking (Clause 8.1):
  Pulaski head must be marked with:

  • Nominal mass
  • Manufacturer’s initials
  • Recognized trademark

• Sampling & Conformity (Clause 9.1.2.3):
  One sample per lot tested for mass and performance; must pass to conform.

Summary Table: Pulaski Head Mass & Hardness

flowchart TD
    A[Pulaski Head] --> B[Mass: 1.70 ± 0.06 kg]
    A --> C[Material: Carbon Steel]
    C --> D[Carbon: 0.72-0.93%]
    C --> E[Manganese: 0.30-0.90%]
    C --> F[Sulphur: ≤ 0

IS 12853 - Performance Tests: Key Points

• Sampling for Performance Tests (Clause 9.1.2.3):

  • One sample per property (mass, performance) is tested from the lot.
  • The lot conforms only if the sample passes all tests.

• Sampling in Absence of Manufacturer's Certificate (Clause 9.1.2.4):

  • One item from each consignment is tested individually for compliance.

• Performance Test References:

  • See Clauses 6.1, 6.2, and 6.3 for detailed test methods and criteria (not fully provided here).

• Marking Requirements (Clause 8.1):

  • Tool must be marked with nominal mass, manufacturer's initials, and trademark.

Summary Table for Sampling & Testing

Additional Notes:

• Tests should follow IS 2:1960 rounding rules.
• BIS certification ensures ongoing conformity via inspection and quality control.

flowchart LR
    A[Lot of Tools] --> B{Sample for Mass Test?}
    B -- Yes --> C[Test Mass]
    C --> D{Pass?}
    D -- No --> E[Lot Rejected]
    D -- Yes --> F{Sample for Performance Test?}
    F -- Yes --> G[Test Performance]
    G --> H{Pass?}
    H -- No --> E
    H -- Yes --> I[Lot Accepted]

This ensures quality assurance for Pulaski tools per IS 12853.

IS 12853 — Workmanship and Finish (Clause 7 and 9)

Key Specifications:

• Pulaski Head Quality (Clause 7.1):

  • Free from cracks, laps, burrs, cupping, and other defects.
  • Surface finish (except cutting edge): average roughness ≤ 3 μm.
  • Cutting edge finish: average roughness ≤ 75 μm.
  • Head (except bevel parts) must be painted or enameled.
  • Bevel surfaces coated with light oil or wax.

• Sampling and Inspection (Clause 9.1.2.2 & 9.1.2.4):

  • Samples selected randomly from lots as per Table 1:

• Each sample is visually examined for workmanship and finish.

• If manufacturer’s certificate is absent, one item per consignment is individually tested.

• Testing (Clause 6.3.1):

  • Pulaski bit overhangs support by 50 mm.
  • Two hard blows with 1.75 kg wooden mallet on each side of the bit.
  • No fractures or deformations allowed.

Summary Diagram

flowchart TD
    A[Pulaski Head] --> B{Inspect Surface}
    B -->|Cracks, burrs, laps| C[Reject]
    B -->|No defects| D[Check Roughness]
    D -->|≤ 3 μm (surface)| E[Pass]
    D -->|> 3 μm| C
    E --> F{Cutting Edge Finish}
    F -->|≤ 75 μm| G[Paint/Enamel except bevel]
    F -->|> 75 μm| C
    G --> H[Coat bevel with oil or wax]
    H --> I[Sampling as per Table 1]
    I --> J[Visual & Physical Tests]
    J -->|Pass| K[Lot Accepted]
    J -->|Fail| C

This ensures quality, durability, and compliance with IS 12853 for Pulaski tools.

IS 12853 - Marking Specifications Summary

• Marking Requirements (Clause 8.1):
  The Pulaski tool shall be marked with:

  • Nominal mass (weight)
  • Manufacturer’s initials
  • Recognized trade-mark

• Standard Mark Use:
  Governed by the Bureau of Indian Standards Act, 1986, the Standard Mark ensures:

  • Compliance with IS specifications
  • Quality control supervised by BIS
  • Continuous conformity checks by BIS

• Sampling for Conformity (Clause 9.1.2.4):

  • If manufacturer’s certificate is absent, one item from each consignment shall be individually tested for compliance.

• Dimensions & Tolerances:
  Refer to Fig. 1 (Clause 4.1) for detailed dimensions and tolerances of the tool.

Quick Reference Table for Marking

Notes:

• Marking ensures traceability and quality assurance.
• Always verify the latest edition and amendments from BIS.
• Use IS 2:1960 for rounding off numerical values in marking.

flowchart LR
    A[Pulaski Tool] --> B[Marking]
    B --> C[Nominal Mass]
    B --> D[Manufacturer's Initials]
    B --> E[Recognized Trade Mark]
    B --> F[Standard Mark (BIS)]

For detailed marking dimensions and tolerances, consult Fig. 1 of IS 12853.

IS 12853: Sampling and Criteria for Conformity

Sampling (Clause 9.1.2.2 & Table 1)

• Samples are selected at random from the lot.
• Visual examination per requirements of Clauses 3, 7, and 8 must be passed by all samples for lot conformity.

Criteria for Conformity (Clause 9.1.2.3)

• For mass and performance tests (Clauses 5, 6.1, 6.2, 6.3), test one sample per property.
• The sample must pass the test for the entire lot to conform.

Additional Specification (Clause 8.1)

• Pulaski tools must be marked with:
  • Nominal mass
  • Manufacturer’s initials
  • Recognized trademark

This ensures quality control by combining random sampling with strict pass criteria for visual, mass, and performance tests.