Thread Repair Kits, BSW 1" - 1,5D

• Thread repair of damaged or worn-out BSW 1" × 8 internal threads
• Thread armour plating for materials with low shear strength (e.g. aluminium, castings, soft steels)
• Recovery of rejected or scrapped components
• Creation of new, strong and long-lasting internal threads
• Ideal for maintenance, installation and small series production
• Wire thread inserts according to DIN 8140, tolerance ISO 2 (6H), Type S – free running, stainless steel

• Flexible application through inserts and system tools
• High availability for standard and special dimensions
• Suitable for hand tapping
• Higher thread load capacity after repair due to improved thread geometry
• Temperature and corrosion resistant stainless-steel inserts
• Cost-effective alternative to replacing components
• Functional and durable storage case

1. Preparation: Clean the damaged thread and remove chips, paint or coating residues.
2. Check core hole: Ensure the correct STI core diameter. Drill if needed (drill not included).
3. Cut STI thread: Use the STI-Short Machine Tap BSW 1" × 8 and apply cutting oil. Keep the tool aligned.
4. Prepare insert: Mount the insert on the Inserting tool No. 23 and adjust the stop ring.
5. Install insert: Screw the insert into the STI thread until flush or slightly below surface level.
6. Break tang: Remove the driving tang cleanly using a suitable tool.
7. Final check: Test the repaired thread with a suitable BSW 1" × 8 bolt.

Full technical details can be found in the Technical Information V-COIL Thread Repair (PDF) .

• Thread size: BSW 1" × 8
• Repair length: 1.5D
• Thread standard: British Standard Whitworth
• Insert type: Type S – free running
• Insert material: Stainless steel
• Standard: DIN 8140, ISO 2 (6H)
• STI Tap: STI-Short Machine Tap, Form D, HSS-G
• Inserting tool: No. 23
• Packaging: Plastic case
• Article number: 04152
• Technical PDF: V-COIL Thread Repair – Technical Information

• 1× STI-Short Machine Tap, Form D, HSS-G, BSW 1" × 8 (03213)
• 1× Inserting tool with locking ring, No. 23 (08023)
• 4× Wire thread inserts – Type S – free running – BSW 1" × 8 – 1.5D (08355)

Where is BSW 1" × 8 typically used?
Mostly in machinery, industrial equipment and older British designs.

Can I repair blind and through holes?
Yes. Just ensure the insert length fits and the tang can be removed properly.

Is the repaired thread as strong as the original?
Often stronger — stainless-steel wire inserts significantly increase thread load capacity.

Do I need special machines?
No, the kit is suitable for hand use. Proper alignment and lubrication are key.

Are other thread sizes available?
Yes, V-COIL offers metric, BSW, BSF, UNC, UNF and special repair kits.