G71,G72,G73,G74,G75,G76 & G92 Cycles Turning Programming Explanation Detail
1, G71-STOCK REMOVAL IN TURNING
G71U_R_
G71P_Q_U_W_F_
2, G72-STOCK REMOVAL IN FACING
G72 W_R_
G72P_Q_U_W_F_
3, G73-PATTERN REPEATING CYCLE
G73 U_W_R_
G73P_Q_U_W_F_
4, G74-PECK DRILLING CYCLE
G74R_
G74Z_Q_F_
5, G75-GROOVING CYCLE ON X AXIS
G75R_
G75X_Z_P_Q_R_F_
6, G76-MULTIPLE REPETITIVE PASS THREADING CYCLE
G76P___Q_R_
G76X_Z_R_P_Q_F_
7, G92-THREADING CYCLE
G92X_Z_R_F_
How to calculate minor diameter
Metric threads =0.61363%
Metric thread angle = 60°
Inch threads =0.649519%
Inch thread angle = 55°
Minor dia=major dia - ((0.6136×pitch)×2))
Thread height = (0.6136*2)
Example
M12*1.75
Minor dia =12-((0.6136*1.75)*2))Minor dia =12 - 2.1476
Minor dia =9.8524mm
Example
3/4 BSW 10 TPI
Major dia = 3/4*25.4=19.05mm
Pitch=25.4/10= 2.54mm
Minor dia =19.05 - ((0.6495*2.54)*2))
Minor dia =19.05 - 3.299
Minor dia =15.75mm
Thread height={0.6495*pitch}
{0.6495*2.54}
Thread heigh =1.6497mm
External Threading Mansion {1A,2A,3A}
Internal Threading Mansion {1B,2B,3B}
1, Loose thread {1A,1B}
2, medium thread {2A,2B}
3, tight threads. {3A,3B}
UNC=thread diameter with course pitch
UNF=thread diameter with fine pitch
UNEF=thread diameter with extra fine
BSPT=British standard pipe thread extra fine
6H
G,H = letter designation for
internal thread
g, h =letter designation for
External thread