Balax 12312-91C Thread Forming Tap 10-32 Unf Bottoming Ticn

Product Description

The BALAX 12312-91C is a bottoming-style thread forming tap designed for right-hand, blind-hole threading in steel applications. Built from powdered metal high-speed steel (PM-HSS) and coated with titanium carbonitride (TiCN), this tap delivers extended tool life and reduced friction in demanding tapping operations. It is sized for 10-32 UNF threads with a 2B class of fit and an H5 thread limit, producing precise internal threads without cutting chips. The bottoming chamfer - 2.5 chamfered threads - allows threading close to the bottom of a blind hole. Overall length is 2.375 inches with a thread length of 0.6 inches and a tapping depth of 0.875 inches.

This tap is suited for use in steel workpieces in both production and maintenance environments. Thread forming taps are preferred in ductile metals where chipless threading reduces the risk of tap breakage and eliminates chip evacuation concerns. The BXSTEEL series designation confirms its optimization for steel material applications. It is commonly used in machine shops, manufacturing lines, and field repair work where 10-32 UNF fastener threads are required in blind holes. Licensed machinists, tool-and-die professionals, and maintenance mechanics are the primary users.

Key Features

• Powdered metal high-speed steel construction for superior wear resistance over conventional HSS
• TiCN coating reduces friction and extends tool life in steel tapping operations
• Bottoming chamfer (2.5P) threads close to the base of blind holes
• Chipless thread forming process eliminates chip evacuation in blind holes
• H5 thread limit ensures consistent 2B class of fit tolerance
• Single oil groove supports lubrication delivery during the tapping cycle

Compatibility

Designed for blind-hole threading in steel workpieces requiring 10-32 UNF internal threads with a 2B class of fit. Material application is rated for steel per the BXSTEEL series specification.

Installation Notes

Thread forming taps must be used with a suitable tapping fluid or cutting oil matched to the workpiece material - dry tapping is not recommended. Ensure the tap is driven with a calibrated torque handle or tapping attachment to avoid overload and breakage. Power down any machine tool and secure the workpiece firmly before setup. Follow applicable shop safety standards and manufacturer speed-and-feed recommendations for PM-HSS taps in steel.