Kyocera SINL1616S-16 – Internal Threading Toolholder (THC04104)

The Kyocera SINL1616S-16 (Item no. THC04104) is a precision internal threading toolholder engineered for indexable threading inserts. Designed for use in bores with a minimum diameter of approximately 16 mm, this left-hand solid bar toolholder offers robust rigidity and accurate thread cutting, making it ideal for internal thread creation in a wide range of materials.

Its precision ground shank and head geometry provide stable insert seating and repeatable machining performance. The SINL style is built for reliability and long service life in demanding internal threading applications.

Key Features & Benefits

• Solid internal threading toolholder designed for SINL-style threading.
• Suitable for internal threading in holes with a minimum diameter of ~16 mm.
• Precision ground shank and head deliver stable cutting and improved surface finish.
• Left-hand cutting orientation — typical for internal threading operations.
• Compatible with standard internal threading inserts (e.g., 16IL200ISO style). 
• Solid one-piece toolholder construction for long tool life.

Technical Specifications

• Item No: THC04104
• Model: SINL1616S-16
• Application: Internal threading
• Minimum Bore Diameter: ~16 mm
• Cutting Direction: Left-hand 
• Compatible Inserts: 16IL-style threading inserts 
• Shank Type: Solid bar
• Internal Coolant: No internal coolant