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PM reduces cost of manufacturing clutch gear by 50%
Clutches inside disabled-persons" vehicles use this helical planetary gear made by Porite of Taiwan. The gear is seen here from both sides.
PM reduces cost of
manufacturing clutch gear by 50% TAIWANESE firm P o r i t e h a s r e d u c e d by 50% t h e cost of m a k i n g a 61 m m d i a m e t e r p l a n e t a r y helical gear used in t h e c l u t c h of a v e h i c l e for disabled people. The c o m p a n y sinters 10 000 a year of t h e p a r t from its 8 7 0 1 3 8 g r a d e steel
powder. Previously m a c h i n i n g a n d milling were used. The alloy p o w d e r used in t h e 11 m m t h i c k g e a r i n c l u d e s copper, iron a n d carbon. 10%
of c o p p e r is infiltrated into t h e steel to give t h e final p a r t a h a r d n e s s of HRB 75 a n d a density of 7.2 g / c m 3. The p a r t ' s i n n e r d i a m e t e r is 23 mm.
PM l e s s c o s t l y than m i l l i n g in manufacture of gear PM IS a b o u t 66% less costly t h a n milling in t h e .manufacture of a sewing m a c h i n e pattern selector release gear. Porite m a k e s 50 000 a year of the sintered components using alloy powder containing iron, copper and carbon. The c h a n g e to PM n e e d e d t h e a d d i t i o n of a small groove to ease c o m p a c t i o n of t h e gear's 35 teeth. Post-sintering operat i o n s o n t h e 10 ram t h i c k p a r t include turning, drilling, t a p p i n g a n d reaming. S t e a m t r e a t m e n t is u s e d to give i t a r e s i s t a n c e t o torque. Inside a n d outside d i a m e t e r s are 6 n u n a n d 32 man a n d t h e p a r t h a s a
The reverse side of the pattern selector gear.
2
MPR May 1993
Porite makes this part for sewing machines at 66% less than the manufacturing cost of milling.
PM reduces cost of
manufacturing clutch gear by 50% TAIWANESE firm P o r i t e h a s r e d u c e d by 50% t h e cost of m a k i n g a 61 m m d i a m e t e r p l a n e t a r y helical gear used in t h e c l u t c h of a v e h i c l e for disabled people. The c o m p a n y sinters 10 000 a year of t h e p a r t from its 8 7 0 1 3 8 g r a d e steel
powder. Previously m a c h i n i n g a n d milling were used. The alloy p o w d e r used in t h e 11 m m t h i c k g e a r i n c l u d e s copper, iron a n d carbon. 10%
of c o p p e r is infiltrated into t h e steel to give t h e final p a r t a h a r d n e s s of HRB 75 a n d a density of 7.2 g / c m 3. The p a r t ' s i n n e r d i a m e t e r is 23 mm.
PM l e s s c o s t l y than m i l l i n g in manufacture of gear PM IS a b o u t 66% less costly t h a n milling in t h e .manufacture of a sewing m a c h i n e pattern selector release gear. Porite m a k e s 50 000 a year of the sintered components using alloy powder containing iron, copper and carbon. The c h a n g e to PM n e e d e d t h e a d d i t i o n of a small groove to ease c o m p a c t i o n of t h e gear's 35 teeth. Post-sintering operat i o n s o n t h e 10 ram t h i c k p a r t include turning, drilling, t a p p i n g a n d reaming. S t e a m t r e a t m e n t is u s e d to give i t a r e s i s t a n c e t o torque. Inside a n d outside d i a m e t e r s are 6 n u n a n d 32 man a n d t h e p a r t h a s a
The reverse side of the pattern selector gear.
2
MPR May 1993
Porite makes this part for sewing machines at 66% less than the manufacturing cost of milling.