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PM cuts cost of hand sander's gear set
PM
........... this helical g e a r in used in h a n d sanding
This straight
bevel gear made by Pennsylvania Pressed Metals j o i n s .............
PM
cuts
sander's
cost gear
of hand set
SINTERING is u s e d to m a k e hand-sander gear sets that were previously m a c h i n e d from c u t steel. PM p r o d u c e s less costly gears with d i m e n s i o n a l control comparable to that o b t a i n e d by machining. Pennsylv a n i a Pressed Metals of Emporium, Pennsylvania, USA, h a s been p r o d u c i n g t h e p a r t s for
Cluster are
gear
parts
integrated
PRODUCTION via PM ENABLES one-piece cluster gears to be
five years a n d t u r n s t h e m o u t at a r a t e of 10 000 a year. The set includes one 83.5 g helical a n d one 293 g straightbevel gear m a d e from FX 1008 steel powder. PM m a n u f a c t u r e demanded that the company change the corner radii and c h a m f e r s of t h e original design to p r e v e n t deflection cracks a n d to keep tool life long. In t h e m a n u f a c t u r e of t h e helical gear, Pennsylvania c o r n -
m a d e t h a t have t i g h t e r tolerances t h a n m a c h i n i n g t h e p a r t from cut steel. The cut steel version also h a d to be m a d e f r o m two c o m p o n e n t s a t a
a set tools.
p a c t s t h e p o w d e r in a 20 t o n n e p r e s s i n t o a g r e e n p a r t of density 6.5 g / c m 3. The s t r a i g h t bevel gear green p a r t is comp a c t e d in a 200 t o n n e multi a c t i o n p r e s s to a d e n s i t y of 6.8 g / c m 3. After s i n t e r i n g a t l l 2 0 ° C in a n a t m o s p h e r e of n i t r o g e n a n d hydrogen, t h e s e d e n s i t i e s increase to a minim u m of 7.3 g / c m 3. Final p a r t p r o p e r t i e s include ultimate-tensile a n d y i e l d s t r e n g t h s of 640 N / m 2 a n d 435 N / m 2, respectively. A p p a r e n t h a r d n e s s a n d elongation are RB 90 a n d 3.5%.
higher cost. Pennsylvania Pressed Metals m a k e s 2500 a m o n t h of t h e gear for use in circular saws. PM p r o d u c t i o n h a s also resulted in gears t h a t are quieter in operation. The c o m p a n y uses a 200 t o n n e m u l t i - a c t i o n p r e s s to c o m p a c t FN 0208 powder into a green p a r t of density between 6.85 a n d 7.05 g / c m 2. Sintering is c a r r i e d o u t a t 1120°C in a nitrogen/hydrogen atmosphere t o give p a r t s w i t h a f i n a l density of between 6.8 a n d 7.2 g / c m 2. The gears have ultimatetensile a n d yield s t r e n g t h s of 895 N / m m 2. Elongation is 0.5% and Young's modulus is 131 000 N / m 2.
PM has allowed Pennsylvania Pressed Metals to m a k e this cluster g e a r in one piece.
MPR May lg~l 3
........... this helical g e a r in used in h a n d sanding
This straight
bevel gear made by Pennsylvania Pressed Metals j o i n s .............
PM
cuts
sander's
cost gear
of hand set
SINTERING is u s e d to m a k e hand-sander gear sets that were previously m a c h i n e d from c u t steel. PM p r o d u c e s less costly gears with d i m e n s i o n a l control comparable to that o b t a i n e d by machining. Pennsylv a n i a Pressed Metals of Emporium, Pennsylvania, USA, h a s been p r o d u c i n g t h e p a r t s for
Cluster are
gear
parts
integrated
PRODUCTION via PM ENABLES one-piece cluster gears to be
five years a n d t u r n s t h e m o u t at a r a t e of 10 000 a year. The set includes one 83.5 g helical a n d one 293 g straightbevel gear m a d e from FX 1008 steel powder. PM m a n u f a c t u r e demanded that the company change the corner radii and c h a m f e r s of t h e original design to p r e v e n t deflection cracks a n d to keep tool life long. In t h e m a n u f a c t u r e of t h e helical gear, Pennsylvania c o r n -
m a d e t h a t have t i g h t e r tolerances t h a n m a c h i n i n g t h e p a r t from cut steel. The cut steel version also h a d to be m a d e f r o m two c o m p o n e n t s a t a
a set tools.
p a c t s t h e p o w d e r in a 20 t o n n e p r e s s i n t o a g r e e n p a r t of density 6.5 g / c m 3. The s t r a i g h t bevel gear green p a r t is comp a c t e d in a 200 t o n n e multi a c t i o n p r e s s to a d e n s i t y of 6.8 g / c m 3. After s i n t e r i n g a t l l 2 0 ° C in a n a t m o s p h e r e of n i t r o g e n a n d hydrogen, t h e s e d e n s i t i e s increase to a minim u m of 7.3 g / c m 3. Final p a r t p r o p e r t i e s include ultimate-tensile a n d y i e l d s t r e n g t h s of 640 N / m 2 a n d 435 N / m 2, respectively. A p p a r e n t h a r d n e s s a n d elongation are RB 90 a n d 3.5%.
higher cost. Pennsylvania Pressed Metals m a k e s 2500 a m o n t h of t h e gear for use in circular saws. PM p r o d u c t i o n h a s also resulted in gears t h a t are quieter in operation. The c o m p a n y uses a 200 t o n n e m u l t i - a c t i o n p r e s s to c o m p a c t FN 0208 powder into a green p a r t of density between 6.85 a n d 7.05 g / c m 2. Sintering is c a r r i e d o u t a t 1120°C in a nitrogen/hydrogen atmosphere t o give p a r t s w i t h a f i n a l density of between 6.8 a n d 7.2 g / c m 2. The gears have ultimatetensile a n d yield s t r e n g t h s of 895 N / m m 2. Elongation is 0.5% and Young's modulus is 131 000 N / m 2.
PM has allowed Pennsylvania Pressed Metals to m a k e this cluster g e a r in one piece.
MPR May lg~l 3