Dimensions and tolerances for hot-rolled track shoe sections, Part 2: Section TS-H1

IS 10182 Part 2 — Scope Summary & Key Specifications

Scope (Clause 2.1)

• Defines dimensional parameters and tolerances for track shoe sections.
• Specifies letter symbols representing dimensions (see Fig. 1 & Table 1).

Key Dimensions & Tolerances (Table 1)

Radii (mm)

Material Guidelines (Appendix A)

• Material recommendations are informative, not mandatory.
• Chemical composition tolerances (product analysis):

Summary Diagram of Key Dimensions

graph TD
    Lt[Total Length (Lt)]
    La[Grouser Axis Length (La)]
    twt[Thickness Grouser Top (twt)]
    twb[Thickness Grouser Bottom (tw

IS 10182 Part 2 — Symbols & Designations: Key Details

1. Symbols (Clause 2.1, Table 2)

2. Dimensional Tolerances (Clause 4.1, Table 1)

• Unspecified tolerances = ± 0.8 mm
• Example: Hw = 78.0 mm with +1/-3 mm tolerance

3. Chemical Composition Variations (Clause 2.2, Table A-2)

Summary Table (Dimensions & Tolerances)

IS 10182 Part 2 (1985) — Designation and Specifications for Shoe Section TS-H1

Designation

• Shoe Section: TS-H1 (Clause 3.1)

Key Specifications

• Mass per unit length: 57.4 kg/m
• Steel density: 7.85 kg/dm³ (Clause 5.1)

Dimensions & Tolerances

• Detailed dimensions are provided in Fig. 1 (TS-H1 shoe section) of the standard.
• Tolerances are specified to ensure interchangeability and performance under extreme service conditions.

Material Recommendations

• Given in Appendix A (informative, not mandatory).
• Based on manufacturer experience for durability and wear resistance.

Summary Table:

flowchart TD
    A[Shoe Section TS-H1] --> B[Mass = 57.4 kg/m]
    A --> C[Dimensions per Fig. 1]
    A --> D[Material Guidelines (Appendix A)]
    B --> E[Steel Density = 7.85 kg/dm³]
    D --> F[Wear resistance & durability]

For exact dimensions, refer to Fig. 1 of IS 10182 Part 2.

IS 10182 Part 2: Dimensions and Tolerances for Hot Rolled Track Shoe Sections

Key Dimensions & Tolerances (from Table 1)

Notes:

• Unspecified tolerances default to ± 0.8 mm.
• Hw (height of web) has asymmetric tolerance (+1, -3 mm) due to manufacturing considerations.
• Radii (R1 to R11) are critical for fitting and stress distribution; tolerances ensure proper assembly.

Summary:

• Use Table 1 as the primary reference for all dimensional checks.
• Apply ± 0.8 mm tolerance for dimensions not explicitly given.
• Pay special attention to Lt, La, twt, twb, tp, Hw due to larger or asymmetric tolerances.

flowchart TD
    A[Start: Design Dimensions] --> B{Dimension in Table 1?}
    B -- Yes --> C[Apply specified tolerance]
    B -- No --> D[Apply

Mass Requirements as per IS 10182 Part 2

• Mass per unit length:
  [ m = 57.4 \text{ kg/m} ] based on steel density (\rho = 7.85 \text{ kg/dm}^3).

• Tolerance on mass:
  [ \pm 2.5% \text{ on mass per metre length} ]

• Key Dimensions and Tolerances (mm):

• Density used for mass calculation:
  [ \rho = 7.85 \text{ kg/dm}^3 ]

Summary formula for mass per unit length:

[ m = \rho \times A ]

Where:

• (m) = mass per unit length (kg/m)
• (\rho) = density of steel (7.85 kg/dm³)
• (A) = cross-sectional area (dm²)

Visual aid: Section dimensions and tolerances

graph LR
A[Lt = 258 ± 3.5 mm] --> B[La = 189.5 ± 1.5 mm]
B --> C[twt = 26 ± 1.5 mm]
B --> D[twb = 39 ± 1 mm]
C --> E[tp = 19 ± 0.8 mm]
D --> F[Hw = 78 +1/-3 mm]

This ensures precise mass

IS 10182 Part 2: Material Requirements Summary

1. Dimensional Specifications (Clause 2.1, Table 1)

Refer to Table 1 for full dimensional details and tolerances.

2. Chemical Composition (Clause 2.2, Tables A-2.1 & A-2.2)

Note: Boron factor should be between 1.8 and 2.2.

3. Additional Notes

• Material guidelines in Appendix A are recommendatory, not mandatory.
• Product analysis is performed on finished products, with permissible variations as above.
• Residual elements should be controlled within specified max limits.

This ensures material quality and dimensional accuracy for track shoe sections per IS 10182

IS 10182 Part 2: Rolling Tolerances Summary

Key Specifications (Clause 7.0 & Table 1)

Measurement Method:

• Rolling tolerances are measured as per Fig. 2 (not shown here), ensuring dimensional accuracy during manufacturing.

Notes:

• Dimensions without specified tolerances are controlled by fit and function.
• Steel grade and other material specifics are in Appendix A.
• Tolerances ensure interchangeability and proper fit of track shoe sections.

Practical Use:

• Use these tolerances to verify manufacturing precision.
• Critical for quality control in rolling mill operations.

flowchart LR
    A[Raw Steel] --> B[Rolling Process]
    B --> C{Dimension Check}
    C -->|Within Tolerance| D[Accept]
    C -->|Out of Tolerance| E[Rework or Reject]

For detailed dimensional checks, refer to Table 1 dimensions and tolerances above.

IS 10182 Part 2 - Length of Shoe Sections (TS-H1 Type)

• Clause 8.1: Length of shoe sections is not fixed by the code; it is mutually agreed between purchaser and supplier.
• Designation: TS-H1 (Clause 3.1)
• Mass per unit length: 57.4 kg/m (Clause 5.1), based on steel density 7.85 kg/dm³.
• Dimensions & Tolerances: Detailed in the standard's Fig. 1 (TS-H1 shoe section), specifying cross-sectional dimensions and manufacturing tolerances.
• Application: Designed for extreme service conditions in earthmoving equipment, subjected to heavy wear.

Practical Notes:

• Since length is variable, typical lengths range from 200 mm to 600 mm, depending on equipment.
• Use mass per unit length to estimate weight:
  [ \text{Weight} = 57.4 \times \text{Length (m)} \quad \text{(kg)} ]

Summary Table

flowchart LR
    A[Purchaser] -->|Agrees Length| B[Supplier]
    B --> C[Manufacture TS-H1 Shoe Section]
    C --> D[Mass = 57.4 kg/m × Length]
    D --> E[Use in Earthmoving Equipment]

In brief: IS 10182 Part 2 does not fix shoe length; it must be agreed. Use mass/unit length 57.4 kg/m for weight calculations. Refer to Fig.1 for detailed section dimensions.

IS 10182 Part 2: Surface and Material Defects Key Points

1. Surface Defects (Clause 9.4)

• Defects like linear scars, insertions, roll scars, surface roughness, scale scars, jaw scars causing notches:
  • Not permitted on grouser fillet radii R6 and R7.
  • Permitted elsewhere up to 1 mm depth without grinding.

2. Material Defects (Clause 9.3)

• Piping and laminations are not permitted.
• Hairline cracks:
  • Not allowed on grouser fillet (R6, R7).
  • Elsewhere, cracks ≤1 mm depth may be removed by grinding.

3. Decarburization (Clause 3.4)

• Maximum decarburized depth: 0.75 mm per surface.
• Carbon-free layer is not permitted.

Additional Specifications:

• Surface quality provisions are exceptions; purchaser and supplier must mutually agree on permissible defects.
• Surface defects must not impair final heat-treated component performance.

Visual Summary:

graph TD
A[Surface Defects] --> B{Location}
B -->|Grouser fillet R6, R7| C[No defects allowed]
B -->|Other areas| D[Defects ≤ 1 mm depth allowed]
E[Material Defects] --> F[Piping & Laminations: Not allowed]
E --> G[Hairline cracks]
G -->|Grouser fillet| H[Not allowed]
G -->|Other areas| I[≤ 1 mm depth allowed with grinding]
J[Decarburization] --> K[Max depth 0.75 mm]
K --> L[No carbon-free layer]

For detailed microscopic methods on grain size and inclusion content, refer to IS 10182 Part 2 (1985) annexures.

IS 10182 Part 2 - Recommended Material for TS-H1 Section

Key Specifications:

• Section: TS-H1 Hot Rolled Track Shoe
• Mass per unit length: 57.4 kg/m
• Density of steel: 7.85 kg/dm³ (7,850 kg/m³)

Material Recommendations (Appendix A):

• The material guidelines are informative, not mandatory.
• Based on manufacturer and user experience in India.
• Typical steel grade: Mild steel or carbon steel with mechanical properties suitable for track shoe sections (e.g., yield strength ~250 MPa).

Dimensional Reference:

• Refer to Fig. 1 in IS 10182 Part 2 for exact profile and dimensional tolerances.

Calculations:

[ \text{Volume per meter} = \frac{\text{Mass per meter}}{\text{Density}} = \frac{57.4 \text{ kg/m}}{7850 \text{ kg/m}^3} = 7.31 \times 10^{-3} \text{ m}^3/\text{m} = 7310 \text{ mm}^2 ]

This cross-sectional area (~7310 mm²) corresponds to the hot rolled TS-H1 profile.

Summary Table:

flowchart LR
    A[Steel Density] --> B[Calculate Cross-sectional Area]
    B --> C[Mass per unit length = 57.4 kg/m]
    C --> D[Design TS-H1 Section Profile]
    D --> E[Manufacturing & Quality Checks]

Note: Always verify dimensional tolerances and material properties as per latest IS 10182 updates or manufacturer specs.