Whatever tool you choose, you must know:

　　What is the material to be processed? What machine is used for machining? Finish machining or rough machining? Is there any drawing requirements? What is the pressing method? How much is the cutting edge? The blade model?

　　1、 External turning tool:

　　What is the required main deflection angle of the tool? Is there any drawing requirement? What is the material to be processed? Is there any hardness requirement?

　　2、 Inner hole turning tool:

　　How big is the diameter? How deep is the hole? How big is the inner diameter of the tool sleeve? Is there any interference in the inner hole?

　　3、 Grooving knife:

　　What is the cutting depth? What is the groove width? Is it the outer round groove or the inner hole groove cutter? **** what is the machining diameter and the minimum machining diameter? (special question of the end groove cutter)

　　4、 Cutter:

　　What is the cutting diameter? What is the required slot width?

　　5、 Thread turning tool:

　　Front and back hand of thread turning tool? External thread or internal thread? Metric system or British system? What is the pitch?

　　Knife clip

　　Milling cutters: (taking machining center as an example)

　　What is the connection mode between tool and machine tool? Btntcatisor8dinehskmt

　　1. Bit clamping type:

　　Elastic collet type or three jaw centering type? How large is the tool installed? How much is the ER?

　　What is the handle size of taper handle? What is the length?

　　2. Clamping milling cutters:

　　What is the size of the milling cutter to be clamped? Should it be strong or standard or high-speed?

　　What is the size of taper shank? What is the size of threaded hole?

　　3. Installation of thread taps:

　　Rigid tapping or flexible tapping? What size tap?

　　4. Clamping surface milling cutter head type:

　　What is the diameter of the cutterhead? What is the internal circle of the cutterhead? Is there a length requirement for metric or English holes?

　　5. boring knife:

　　A. rough boring cutter

　　Module type or integrated type? What is the required processing range? Processing length? Is extension bar required?

　　B. precision boring tool

　　Is it modular or integrated? What is the machining accuracy? What is the machining length? Is it required to add extension bar to increase the machining range?

　　6. tool set:

　　Should it be tabular or digital display or projection? What is the measurement range? What is the measurement accuracy?

　　Tool class

　　1、 Milling cutter:

　　1. Integral milling cutter

　　Is the end milling cutter made of high speed steel or hard alloy? What is the hardness of processing? What is the length requirement? How many blades? Ball head or flat head? How many degrees is the shank? What is the thread? What kind of coating? How many degrees is the helix angle raised?

　　2. Blade type milling cutter

　　1) Spindle type milling cutter

　　What is the required diameter? Is there any requirement for blade angle? How long is the machining length?

　　2) knives;

　　What is the diameter? What is the angle of the blade required? Is it required to finish or rough? Is it required to clean the angle of the tool?

　　2、 Bit:

　　1) Straight shank drill

　　Is the drill required to be high-speed rigid or hard alloy? What is the machining diameter? What is the machining depth? Is there any requirement for the cutting edge?

　　2) Taper shank bit

　　What is the original tool sleeve? What is the machining diameter? What is the required machining depth? Is there any requirement for the cutting edge?

　　3、 Taps:

　　1) Screw tap

　　Do you want a left-hand or right-hand tap? What is the required thread size? Is it metric or British? What is the processing accuracy? What is the material to be processed? What is the national standard for the handle?

　　2) Straight slot tap

　　What is the material of processing? Hand attack or machine attack?

　　4、 Chamfering tool:

　　What is the range of chamfer required? What is the angle?

　　5、 Reamer:

　　1) Straight shank reamer

　　What is the depth of machining? What is the precision of machining? What is the diameter of machining?

　　2) Taper shank reamer

　　What is the original taper sleeve? What is the processing depth? What is the processing precision? What is the processing diameter?