Balax 17787-010 M3.5x0.60 Thread Forming Tap Bottoming

Product Description

The BALAX 17787-010 is a thread forming tap designed for cutting M3.5x0.60 metric coarse internal threads in blind hole applications. Unlike cut taps, this forming tap displaces material rather than cutting chips, producing stronger threads with a burnished finish. It is manufactured from high-speed steel with a bright, uncoated finish and features a bottoming chamfer with 1.5 chamfered threads, allowing threads to be formed close to the bottom of a blind hole. The overall length is 2 inches, and the tapping depth reaches 0.6875 inches. This tap is suited for use in ductile metals and is installed by machinists and toolroom technicians on manual or CNC equipment.

This tap is intended for blind hole threading in metric applications requiring an M3.5x0.60 thread form to a 6H class of fit with a D7 thread limit. The bottoming chamfer makes it appropriate for finish-threading operations where a previously started tap has already established the thread lead. It is part of the BALAX BXMOTL series, which covers metric thread forming taps for precision manufacturing environments including aerospace, automotive, and general machining applications.

Key Features

• Thread forming design displaces material rather than cutting chips, producing stronger threads
• Bottoming chamfer with 1.5 chamfered threads for threading close to the bottom of blind holes
• M3.5x0.60 metric coarse thread form, right-hand direction, 6H class of fit
• D7 thread limit for consistent fit in precision metric applications
• High-speed steel construction with bright, uncoated finish
• No oil grooves, no coolant-through - suited for use with surface-applied cutting fluid

Compatibility

Designed as a bottoming thread forming tap for M3.5x0.60 metric coarse blind hole applications requiring a 6H class of fit and D7 thread limit, consistent with BXMOTL series tooling specifications.

Installation Notes

This tap is installed by machinists using a tap wrench, tapping head, or CNC rigid tapping cycle. Power down or disengage the spindle before manually handling the tool. Apply appropriate cutting fluid to the tap and workpiece before forming threads, as no internal coolant delivery is available on this tap. Ensure the pilot hole diameter is correct for thread forming before starting, as forming taps require a larger pilot hole than cut taps for the same thread size.