Product Name: Hand Threading Tool Assembly (1/4″) – Part No. 05108865

Description:
This component is a manual hand threading tool assembly specifically designed for cutting threads onto 1/4 inch (0.25) high-pressure stainless steel tubing ends in waterjet cutting systems . According to the official parts diagram for High Pressure Threading Tools (Table 12-37), this assembly is listed as Item 1 for the .25 (1/4 inch) size and is rated for 60,000 psi (approximately 4,137 bar) high-pressure connections .

The hand threading tool functions as a precision mechanical device that cuts the required UNF-LH (Unified Fine - Left Hand) threads onto tubing ends that have already been coned. Threading is performed after the tubing has been properly coned with a coning tool . The tool features a guide bushing that provides proper centering of the tubing, and its bronze material eliminates any marring of the tubing during the threading operation . The tool uses a replaceable threading die (P/N 05108899) that cuts 1/4-28 UNF-LH threads .

The tool is designed for use with a tube vise (P/N 05108782) that securely holds the tubing during operation . The assembly is a standard OEM maintenance tool used for fabricating custom-length high-pressure lines and replacing damaged tubing sections.

Applications:

• Cutting UNF-LH threads on 1/4 inch high-pressure tubing ends for waterjet systems

• Essential for fabricating custom-length high-pressure lines for system repairs and modifications

• Suitable for preparing tubing for systems operating at pressures up to 60,000 psi (4,137 bar)

• Used in field service, maintenance, and workshop environments for offline tubing preparation

• Compatible with standard waterjet systems from KMT, AccuStream, Flow, OMAX, BFT, WSI, and others

Features:

• Precision Guide Bushing: Bronze guide bushing centers the tubing and prevents marring of the tube surface during threading 

• Replaceable Threading Die: Uses a 1/4-28 UNF-LH threading die (P/N 05108899) that can be replaced when worn 

• Thread Dimensions: Cuts 1/4-28 UNF-LH (Unified Fine - Left Hand) threads with a maximum length (L) of 0.56 inches (14.2 mm) 

• Ergonomic Handle Design: Allows for steady pressure application with counter-clockwise rotation

• Durable Construction: Made from hardened tool steel components designed to withstand repeated use

• Chip Clearance Capability: Designed to allow reverse direction turns to break off and remove chips during threading 

Maintenance:

Usage Guidelines:

• Sequence (Critical): Tubing must be coned with a coning tool prior to threading. Threading cannot be performed on unconed tubing ends 

• Proper Setup: Secure the coned tubing in a tube vise (P/N 05108782). Use a vise with soft jaws to avoid damaging the tubing. No more than the recommended extension length should extend beyond the face of the vise. For 1/4″ tubing, the recommended extension length is 1.25-1.50 inches (31.8-38.1 mm) 

• Use Cutting Oil (Critical): Apply a liberal amount of medium-weight cutting oil with high sulfur content to the end of the tube and the threading die. Apply lubricant frequently and liberally throughout the operation 

• Proper Cutting Technique: Grip the handles firmly, apply steady pressure, and turn the tool counter-clockwise. Approximately every half turn, reverse direction to break off and remove chips 

• Continue to Proper Length: Continue threading until the proper thread length is reached. For 1/4″ HP tubing, the maximum thread length (L) is 0.56 inches (14.2 mm) 

• Complete Operation: When the proper thread length is reached, remove the tool from the end of the tubing

Inspection & Care:

• Clean After Use: Clean machining chips from the die and body of the tool before threading the next tube 

• Inspect Die for Wear: Regularly inspect the threading die for dullness or damage. If the die requires excessive force, produces rough threads, or fails to cut clean threads, replace it immediately

• Die Replacement: When the die becomes worn, replace it with a new OEM threading die (P/N 05108899). Ensure that when installing a new die, the lettering on the die faces down towards the guide bushing to ensure proper orientation of the leading thread 

• Inspect Guide Bushing: Check the bronze guide bushing for wear. A worn bushing will not properly center the tubing

• Check Extension Length: Ensure proper tubing extension length (1.25-1.50 inches) before starting

• Storage: Store the complete tool set in a clean, dry, protective case to prevent damage to precision components

• Full Depressurization (Critical): This tool is for preparing new or replacement tubing offline. Never use it on a pressurized system. Always follow lockout/tagout procedures and ensure the waterjet system is fully depressurized before any maintenance

Cross-Reference Information:

• OEM Part Number: 05108865

• Table Reference: Table 12-37, High Pressure Threading Tools (Item 1) 

• Pressure Rating: 60,000 psi (60K) high-pressure connections 

• Size: .25 (1/4 inch)

• Replacement Threading Die: 05108899 

• Associated Components: Tube Vise (05108782), Retainer (05108741) 

• Thread Specification: 1/4-28 UNF-LH 

• Maximum Thread Length (L): 0.56 inches (14.2 mm) 

• Engagement Allowance: 0.49 inches (12.4 mm) for 1/4″ HP tubing 

• Recommended Extension Length: 1.25-1.50 inches (31.8-38.1 mm) 

• Recommended Cutting Oil: Medium-weight cutting oil with high sulfur content