Общий каталог FANAR 2021 - страница 302

Technical information i 5.5. Thread forming Troubleshooting Problem Solution Incomplete form of thread Reduce the drill diameter for tapping hole or apply the drill diameter according to the selection Table for forming taps page 270. Overdone form of thread, too small minor diameter Increase the drill diameter for tapping hole or apply the drill diameter according to the selection Table for forming taps page 270. Poor quality of thread surface, yanked off material from surface of thread - Improve lubrication: Use forming taps with oil grooves - Increase amount of coolant/lubricant - Use oil for lubricant - Use coated forming tap Tool breaks - Increase tapping hole diameter - Increased amount of coolant/lubricant - Apply cover coating preventing sticking of material being processed - Check compliance of workpiece with recommendations regarding its plasticity and hardness 12 299