wooden anvil blocks

IS 4650: Scope - Key Specifications and Tables

• Scope: Covers specifications for wooden anvil blocks used to support blacksmith's anvils of various weights.

• Timber Species: Only one timber species per block is preferred; mixed species allowed if similar weight class.

• Suitable Timber Species (Appendix A):

• Anvil Block Sizes (Clause 7.1):

• Material: Structural steel, wood screws, hex bolts as per relevant IS codes.

Summary Diagram of Anvil Block Selection

graph TD
    A[Select Anvil Weight] --> B{Weight Range}
    B -->|<=12 kg| C[Block Size 1]
    B -->|13-25 kg| D[Block Size 2]
    B -->|50-75 kg| E[Block Size 3]
    B -->|100-200 kg| F[Block Size 4]
    C --> G[Use single timber species]
    D --> G
    E --> G
    F --> G

Note: Refer IS 4650 for detailed dimensions and preservation methods.

Key Definitions & Specifications from IS 4650

1. Timber Species for Anvil Blocks (Appendix A, Clause 3.1.1):
Suitable timber species must be used for anvil blocks, preferably one species per block. Mixed timbers of similar weight class are allowed if necessary.

2. Anvil Block Sizes (Clause 7.1):
Blocks are sized according to the anvil weight:

3. Material & Components:

• Use MS band 40 x 5 mm thick for reinforcement.
• Dowel size: 25 mm diameter x 75 mm length.

Summary Diagram for Anvil Block Selection

flowchart TD
    A[Select Anvil Weight] --> B{Weight Range}
    B -->|<=12 kg| C[Block Size 1]
    B -->|13-25 kg| D[Block Size 2]
    B -->|50-75 kg| E[Block Size 3]
    B -->|100-200 kg| F[Block Size 4]

Note: Refer to IS 707-1958 for additional definitions related to timber and fasteners.

IS 4650: Materials - Key Points & Specifications

Timber Species (Clause 3.1.1, Appendix A)

Suitable timber for anvil blocks includes:

Only one timber species per block is preferred; mixed species allowed if weight classes match (Clause 4.2).

Anvil Block Sizes (Clause 7.1)

Other Material Specifications

• Structural Steel: Ordinary quality steel as per relevant IS standards.
• Fasteners: Wood screws, black hexagonal bolts (6-39 mm), and black hexagonal screws (6-24 mm).
• MS Band: 40 mm x 5 mm thick used for banding anvil blocks.

Summary Diagram of Material Selection

graph LR
A[Anvil Block] --> B[Timber Species]
A --> C[Structural Steel]
A --> D[Fasteners]
B --> E{Species List}
E -->|Examples| F[Dalbergia sissoo]
E --> G[Shorea robusta]
D --> H[Wood Screws]
D --> I[Hex Bolts & Screws]

Note: Refer to IS 4650 for detailed drawings and exact dimensions of dowels, bands, and staples.

IS 4650: Manufacture of Anvil Blocks — Key Points & Specifications

Timber Use (Clause 4.2)

• Use only one timber species per block if possible.
• Mixed timbers allowed if of similar weight class.

Metal Bands (Clause 4.4)

• Two metal bands fixed near top & bottom of block.
• Bands: MS Band 40 × 5 mm thick.
• Ends of tightened bands must be ≥ 15 mm apart.

Dowels

• Use 25 mm diameter × 75 mm long dowels for fastening.

Metal Components (Clause 4.5)

• All metal parts must be oil blackened before assembly.

Anvil Block Dimensions (Fig. 1 to 4)

Suitable Timber Species (Appendix A)

• Examples: Babul, Sissoo, Sal, Axlewood, Gurjan, Indian Oak, Laurel, Irul.
• Refer to full table for botanical and trade names.

Summary Diagram: Anvil Block Assembly

graph TD
    A[Timber Block] -->|Two MS Bands| B[Metal Bands (40x5 mm)]
    A -->|Dowels (25x75 mm)| C[Wooden Dowels]
    B --> D[Ends ≥ 15 mm apart]
    E[Metal Components] -->|Oil Blackened| B

Note: For detailed dimensions and specifications, refer to IS 4650 Clause 4 and Appendix A.

IS 4650: Workmanship and Finish - Key Points

• Metal Bands: Two mild steel (MS) bands of size 40 × 5 mm thick are fixed near the top and bottom of the anvil block. Ends of bands must be at least 15 mm apart when tightened (Clause 4.4).

• Dowels: Use 25 mm diameter × 75 mm long dowels for fixing (see Figs. 1 to 4 for details).

• Metal Components: All metal parts shall be oil blackened before assembly (Clause 4.5).

• Timber: Preferably use a single timber species per block. Mixed timbers of similar weight class are allowed (Clause 4.2).

• Suitable Timber Species: Refer Appendix A for species like Acacia arabica (Babul), Dalbergia sissoo (Sissoo), Shorea robusta (Sal), Xylia xylocarpa (Irul), etc.

Table: Metal Band Positioning (Example for Anvil Block No. 4)

Summary Diagram (Metal Band Fixing Concept)

graph LR
A[Top of Block] -->|MS Band 40x5 mm| B[Metal Band]
B -->|Ends 15 mm apart| C[Band Ends]
D[Bottom of Block] -->|MS Band 40x5 mm| B
E[25 mm x 75 mm Dowels] --> F[Fixing Blocks]

Note: Follow IS 4650 for detailed figures and dimensions for different anvil weights.

IS 4650: Dimensions and Sizes of Anvil Blocks

Key Specifications:

• Timber Species: Use a single timber species per block; mixed species allowed only if weights are similar (Clause 4.2).
• Materials: Structural steel (ordinary quality), wood screws, black hex bolts (6-39 mm), nuts, and hex screws (6-24 mm) specified.
• MS Band: 40 mm wide x 5 mm thick used for reinforcement.

Dimensions:

• Blocks conform to figures 1 to 4 (all dimensions in mm).
• Dowels: 25 mm diameter x 75 mm long.

Anvil Block Sizes (Clause 7.1):

Notes:

• Refer to figures 1-4 for detailed block dimensions.
• Preservation methods covered under Clause 8.
• For definitions and terms, refer to IS 707-1958.

flowchart TD
    A[Anvil Block Size] --> B{Weight of Anvil (kg)}
    B -->|12| C[Size 1]
    B -->|25| D[Size 2]
    B -->|50,63,75| E[Size 3]
    B -->|100-200| F[Size 4]

This summary ensures compliance with IS 4650 for manufacturing and sizing of anvil blocks.

IS 4650: Sizes and Specifications for Anvil Blocks

1. Sizes of Anvil Blocks (Clause 7.1)

2. Construction & Materials (Clauses 4.2 to 4.5)

• Timber: Use one species per block; mixed timbers allowed only if similar weight class.
• Block Construction:
  • Size 1: Single piece.
  • Sizes 2, 3, 4: 1 or 2-piece construction.
  • For 2-piece: joined heart-face to heart-face with two 25 mm diameter × 75 mm long dowels glued firmly.
• Metal Bands:
  • Two MS bands, 40 mm wide × 5 mm thick, fixed near top & bottom.
  • Ends of bands must be at least 15 mm apart when tightened.
• Metal Components: Oil-blackened before assembly.

3. Key Dimensions for Size 4 Blocks

4. Typical Details

• Dowel: 25 mm diameter × 75 mm long cylindrical dowel.
• MS Band: 40 × 5 mm thick.

Summary Diagram of Anvil Block Assembly

graph TD
    A[Timber Block (1 or 2 pieces)]
    B[Two 25mm Dia × 75mm Dowels (if 2-piece)]
    C[MS Band 40x5 mm (Top)]
    D[MS Band 40x5 mm (Bottom)]
    E[Oil Blackened Metal Components]

    A --> B
    A --> C
    A --> D
    C --> E
    D --> E
``

IS 4650: Preservation of Anvil Blocks - Key Points

1. Suitable Timber Species for Anvil Blocks (Appendix A, Clause 3.1.1):

2. Preservation Treatment:

• Use creosote or anthracene oil as wood preservatives (per relevant IS specifications).
• Proper impregnation ensures durability against decay and insect attack.
• Follow ISI guidelines for application and quality control.

3. Marking and Certification (Clause 9.2):

• Anvil blocks may carry the ISI Certification Mark, ensuring compliance with IS standards.
• Certification guarantees inspection, testing, and quality control during production.

Summary Table: Anvil Block Sizes & Weights (Clause 7.1)

Preservation Process Flow (Mermaid Diagram)

flowchart TD
    A[Select Suitable Timber Species] --> B[Apply Wood Preservative (Creosote/Anthracene Oil)]
    B --> C[Drying & Conditioning]
    C --> D[Marking & Certification (ISI Mark)]
    D --> E[Use in Anvil Block Fabrication]

Note: Always refer to IS 465

IS 4650: Marking of Anvil Blocks — Key Points & Specifications

Clause 9.2: Marking Requirements

• Anvil blocks may be marked with the ISI Certification Mark.
• ISI Mark ensures compliance with quality, inspection, testing, and production standards.
• Use of ISI Mark is regulated under the Indian Standards Institution (Certification Marks) Act.

Timber Species Suitable for Anvil Blocks (Appendix A, Clause 3.1.1)

Additional Specifications:

• Single species per block preferred, but mixed timbers of similar weight class are allowed (Clause 4.2).
• Blocks must be durable and suitable for impact absorption.
• Marking should include ISI Certification Mark if licensed.

Summary Diagram of Marking Process:

flowchart TD
    A[Anvil Block Manufactured] --> B{Single or Mixed Timber?}
    B -->|Single| C[Use Specified Timber Species]
    B -->|Mixed| D[Use Timbers of Similar Weight Class]
    C --> E[Apply Marking]
    D --> E
    E --> F{ISI Certification License?}
    F -->|Yes| G[Mark with ISI Certification Mark]
    F -->|No| H[Mark as per Manufacturer's Identification]

For detailed design and manufacturing dimensions, refer to IS 4650 figures and tables.