MITER GEARS SPIRAL MITER GEARS BEVEL GEARS SPIRAL BEVEL GEARS SELECTION PROCEDURE...79 MITER GEARS...

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1 Miter & Bevel Gears Section ontents ATALOG NUMBER / IMENSIONS MITER GEARS SPIRAL MITER GEARS BEVEL GEARS SPIRAL BEVEL GEARS SELETION PROEURE...79 HORSEPOWER AN TORQUE RATINGS MITER GEARS BEVEL GEARS SPIRAL MITER GEARS SPIRAL BEVEL GEARS STOK ALTERE / USTOM MITER AN BEVEL GEARS MITER / BEVEL GEAR ENGINEERING INFORMATION P-1930-BG 2/18 Boston Gear

2 Miter Gears 48 through 20 iametral Pitch (Nylon, Brass, Stainless Steel & Steel Unhardened) 1:1 Ratio 20 Pressure Angle All gears have oniflex tooth form, except as noted. ISTANE PITH FAE REFERENE PAGES Alterations 322 Lubrication 322 Materials 323 STANAR TOLERANES * IMENSION TOLERANE *Brass and Steel only. ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE No. of Pitch M Hub atalog Item atalog Item atalog Item atalog Item Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode Number ode 48 MOLE STAINLESS STEEL NYLON BRASS STEEL UNHARENE GP G460Y GSS460Y GP4818Y G461Y GSS461Y L94Y GP4824Y GP3216Y G462Y GSS462Y L97Y GP3224Y G463Y GSS463Y L95Y L93Y GP2424Y G464Y L96Y GP2430Y G465Y GP2436Y G466Y L98Y *Mounting istance (M) must not be made less than dimension shown, see Page 316. Not oniflex tooth form. an be furnished with oniflex tooth on special order. Acetal. 70 Boston Gear P-1930-BG 2/18

3 Miter Gears 16 through 10 iametral Pitch (Nylon & Steel Unhardened & Hardened) 1:1 Ratio 20 Pressure Angle All gears have oniflex tooth form, except as noted. All hardened steel gears have teeth only hardened, except as noted, and are equipped with standard keyways and setscrews. PITH ISTANE KEYWAY FAE SETSREW STANAR TOLERANES * IMENSION TOLERANE *Steel only. ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE REFERENE PAGES Alterations 322 Horsepower Ratings 80, 81 Lubrication 322 Materials 323 Selection Procedure 79 No. of Pitch M Hub atalog Item atalog Item atalog Item Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode 16 MOLE STEEL STEEL NYLON UNHARENE HARENE L99Y GP1616Y L110Y HLK110Y ** L111Y L112Y GP1632Y L124Y L100Y L125Y L126Y L101Y HLK101Y ** L127Y L102Y HLK102Y L119Y L120Y L121Y HLK121Y L133Y L113Y L114Y HLK114Y L128Y L129Y HLK129Y L103Y HLK103Y L130Y HLK130Y L104Y HLK104Y L131Y HLK131Y *Mounting istance (M) must not be made less than dimension shown, see Page 316. Not oniflex tooth form. **Hardened all over. Nylon (Mineral Filled). P-1930-BG 2/18 Boston Gear

4 Miter Gears 8 through 4 iametral Pitch (Steel Unhardened, Hardened & ast Iron) 1:1 Ratio 20 Pressure Angle All gears have oniflex tooth form, except as noted. All hardened steel gears have teeth only hardened, except as noted, and are equipped with standard keyways and setscrews. All unhardened steel gears have no keyway and no setscrew. PITH ISTANE KEYWAY FAE REFERENE PAGES Alterations 322 Horsepower Ratings 80, 81 Lubrication 322 Materials 323 Selection Procedure 79 ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE STANAR TOLERANES IMENSION TOLERANE No. of Pitch M Hub atalog Item atalog Item atalog Item Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode 8 STEEL STEEL UNHARENE HARENE AST IRON L115Y HLK115Y L105Y-A L116Y HLK105YA HLK116Y L117Y HLK117Y L132Y L106Y HLK132Y HLK106Y OA828Y SETSREW L123Y HLK123Y OA832Y L118Y L107Y HLK118Y HLK107Y OA624Y L134Y L135Y OA630Y OA636Y L122Y HLK122Y L136Y OA525Y L108Y HLK108Y L137Y L109Y HLK109Y OA424Y ** L138Y *Mounting istance (M) must not be made less than dimension shown, see Page 316. Hub ia. 2 **Hub Proj. 72 Boston Gear P-1930-BG 2/18

5 Spiral Miter Gears 18 through 5 iametral Pitch (Steel Unhardened & Hardened) 1:1 Ratio 20 Pressure Angle 35 Spiral Angle All hardened steel gears have teeth only hardened, except as noted, and are equipped with standard keyways and setscrews. ISTANE PITH FAE ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE No. of Pitch M Hub atalog Item atalog Item Teeth ia. Face Bore * ia. Proj. Number ode Number ode 18 STEEL STEEL UNHARENE HARENE STANAR TOLERANES IMENSION TOLERANE *Mounting istance (M) must not be made less than dimension shown, see Page 316. Hardened all over. REFERENE PAGES Alterations 322 Horsepower Ratings 83 Lubrication 322 Materials 323 Selection Procedure 79 LSA110Y-R HLSK110Y-R LSA110Y-L HLSK110Y-L LSA101Y-R HLSK101Y-R LSA101Y-L HLSK101Y-L LSA102Y-R HLSK102Y-R LSA102Y-L HLSK102Y-L LSA103Y-R HLSK103Y-R LSA103Y-L HLSK103Y-L LSA104Y-R HLSK104Y-R LSA104Y-L HLSK104Y-L LSA106Y-R HLSK106Y-R LSA106Y-L HLSK106Y-L LSA105YA-R HLSK105YA-R LSA105YA-L HLSK105YA-L LSA118Y-R HLSK118Y-R LSA118Y-L HLSK118Y-L LSA107Y-R HLSK107Y-R LSA107Y-L HLSK107Y-L LSA122Y-R HLSK122Y-R LSA122Y-L HLSK122Y-L P-1930-BG 2/18 Boston Gear

6 Bevel Gears 48 through 20 iametral Pitch (Brass, Stainless Steel & Steel Hardened & Unhardened) 20 Pressure Angle REFERENE PAGES Alterations 322 Lubrication 322 Materials 323 All gears have oniflex tooth form, except as noted. All hardened steel gears have teeth only hardened and are equipped with standard keyways and setscrews, except as noted. ISTANE PITH SETSREW PITH KEYWAY FAE STANAR TOLERANES IMENSION TOLERANE ISTANE ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE No. of Pitch M Hub atalog Item atalog Item Ratio Teeth ia. Face Bore * ia. Proj. Number ode Number ode 48 STAINLESS BRASS STEEL G479Y-G G479Y-P GSS479Y-G GSS479Y-P : G478Y-G G478Y-P GSS478Y-G GSS478Y-P G481Y-G G481Y-P GSS481Y-G GSS481Y-P : G486Y-G GSS486Y-G G486Y-P GSS486Y-P G485Y-G G485Y-P G487Y-G G487Y-P STEEL STEEL UNHARENE HARENE L147Y-G L147Y-P HL147Y-G HL147Y-P *Mounting istance (M) must not be made less than dimension shown, see Page 316. Not oniflex tooth form. an be furnished with oniflex tooth on special order. These gears have No. 47 (.0785) drilled hole in hub. No keyway or setscrew. 74 Boston Gear P-1930-BG 2/18

7 Bevel Gears 16 through 12 iametral Pitch (Steel Unhardened, Hardened & ast Iron) 20 Pressure Angle All gears have oniflex tooth form. All Hardened steel gears have teeth only hardened and are equipped with standard keyways and setscrews. ISTANE PITH PITH STANAR TOLERANES IMENSION TOLERANE FAE ISTANE REFERENE PAGES Alterations 322 Horsepower Ratings 82 Lubrication 322 Materials 323 Selection Procedure 79 ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE No. of Pitch M Hub atalog Item atalog Item atalog Item Ratio Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode 16 STEEL STEEL AST IRON GEARS UNHARENE HARENE STEEL PINIONS 1-1/ L146Y-G L146Y-P HL146Y-G HL146Y-P L148Y-G HL148Y-G L148Y-P HL148Y-P L149Y-G HL149Y-G L149Y-P HL149Y-P : PA3316Y-G PA3316Y-P : PA4416Y-G PA4416Y-P : PA6616Y-G PA6616Y-P L150Y-G HL150Y-G HL150Y-P L150Y-P / L151Y-G HL151Y-G L151Y-P HL151Y-P L152BY-G L152BY-P L152Y-G HL152Y-G HL152Y-P L152Y-P *Mounting istance (M) must not be made less than dimension shown, see Page 316. P-1930-BG 2/18 Boston Gear

8 Bevel Gears 12 and 10 iametral Pitch (Steel Unhardened, Hardened & ast Iron) 20 Pressure Angle All gears have oniflex tooth form. All Hardened steel gears have teeth only hardened and are equipped with standard keyways and setscrews. REFERENE PAGES Alterations 322 Horsepower Ratings 82 Lubrication 322 Materials 323 Selection Procedure 79 ISTANE PITH PITH FAE STANAR TOLERANES IMENSION TOLERANE ISTANE ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE No. of Pitch M Hub atalog Item atalog Item atalog Item Ratio Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode 12 STEEL STEEL AST IRON GEARS UNHARENE HARENE STEEL PINIONS PA3212Y-G PA3212Y-P PA4212Y-G PA4212Y-P : PA45312Y-G PA45312Y-P : PA6412Y-G PA6412Y-P : PA6612Y-G PA6612Y-P / L153Y-G HL153Y-G L153Y-P HL153Y-P L155Y-G L155Y-P HL155Y-G HL155Y-P PA5210Y-G PA5210Y-P : L157Y-G L157Y-P PA6310Y-G PA6310Y-P : PA6410Y-G PA6410Y-P : PA9610Y-G PA9610Y-P *Mounting istance (M) must not be made less than dimension shown, see Page Boston Gear P-1930-BG 2/18

9 Bevel Gears 8 through 4 iametral Pitch (Steel Unhardened, Hardened & ast Iron) 20 Pressure Angle All gears have oniflex tooth form. All Hardened steel gears have teeth only hardened and are equipped with standard keyways and setscrews. ISTANE PITH SETSREW PITH KEYWAY FAE ISTANE STANAR TOLERANES IMENSION TOLERANE ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE REFERENE PAGES Alterations 322 Horsepower Ratings 82 Lubrication 322 Materials 323 Selection Procedure 79 No. of Pitch M Hub atalog Item atalog Item atalog Item Ratio Teeth ia. Face Bore * ia. Proj. Number ode Number ode Number ode 8 STEEL STEEL AST IRON GEARS UNHARENE HARENE STEEL PINIONS L156Y-G HL156Y-G L156Y-P HL156Y-P PA528Y-G PA528Y-P : PA638Y-G PA638Y-P : PA848Y-G PA848Y-P PA948Y-G PA948Y-P L158Y-G L158Y-P HL158Y-G HL158Y-P PA626Y-G PA626Y-P PA726Y-G PA726Y-P PA826Y-G PA826-Y-P : PA7536Y-G PA7536Y-P PA625Y-G PA625Y-P : PA935Y-G PA935Y-P PA824Y-G PA824Y-P *Mounting istance (M) must not be made less than dimension shown, see Page 316. P-1930-BG 2/18 Boston Gear

10 Spiral Bevel Gears 30 through 8 iametral Pitch (Steel Unhardened & Hardened) 20 Pressure Angle 35 Spiral Angle All Hardened steel gears have teeth only hardened and are equipped with standard keyways and setscrews, except as noted. All pinions are left hand. REFERENE PAGES Alterations 322 Horsepower Ratings 83 Lubrication 322 Materials 323 Selection Procedure 79 ISTANE ALL IMENSIONS IN INHES ORER BY ATALOG NUMBER OR ITEM OE STANAR TOLERANES IMENSION TOLERANE No. of Pitch M Hub atalog Item atalog Item Ratio Teeth ia. Face Bore * ia. Proj. Number ode Number ode 30 STEEL STEEL UNHARENE HARENE SS302-G SS302-P SH302-G SH302-P SS192-G SS192-P SH192-G SH192-P SS142-G SS142-P SH142-G SH142-P SS142-1G SS142-1P SH142-1G SH142-1P SS102-G SS102-P SH102-G SH102-P SS82-G SS82-P SH82-G SH82-P PITH PITH FAE ISTANE *Mounting istance (M) must not be made less than dimension shown, see Page 316. No keyway or setscrew. 78 Boston Gear P-1930-BG 2/18

11 Miter & Bevel Gears Boston stock miter and bevel gears are designed for transmission of power and/or motion between intersecting shafts at a right angle (90 ). Miter gears are a special type of bevel gear designed to operate as pairs being identical in number of teeth and pitch (1 to 1 ratio only). Other Boston stock bevel gear sets are available with ratios from 1-1/ to 6:1. All Boston standard stock bevels and miters are manufactured with a 20 pressure angle. These bevel gears are made in accordance with AGMA specifications for a long and short addendum system for gears and pinions, which serves to reduce the amount of pinion tooth undercut and to nearly equalize the strength and durability of the gear and pinion. Boston straight tooth bevel and miter gears have generated teeth with oniflex tooth form, unless otherwise specified. INTERHANGE Stock miter and bevel gears having identical diametral pitch, number of teeth and mounting distance (and spiral angle for spiral bevels) are interchangeable. SPIRAL VS. STRAIGHT TOOTH Boston standard stock straight bevel gears can be used for all applications requiring transmission of power and motion between intersecting shafts. Boston standard stock spiral bevel gears have an overlapping tooth action which results in a smoother gear action, lower noise, and higher load capacity than a straight bevel of equal size. Trademark of the Gleason Works. Selection Procedure Approximate horsepower ratings for selected sizes (number of teeth) at various operating speeds (RPM) are given for Boston standard stock Bevel and Miter gears. For straight tooth Miter gears, refer to Pages 80, 81. For straight tooth Bevel gears, refer to Page 82. For spiral tooth Miter gears, refer to Page 83. For spiral tooth Bevel gears, refer to Page 83. All ratings are based on normal operating conditions, that is: properly mounted and lubricated, carrying a smooth load for not more than 10 hours (Service Factor = 1.0). Refer to Table 1 for service factors in other service conditions. 1. etermine service factor. a. Using Application lassification hart I, pages determine service factor or b. With knowledge of operating conditions and load classification, select service factor from Table etermine esign Horsepower. esign HP = Application Load x Service Factor (Table 1) 3. Select a gear set with horsepower capacity equal to (or greater than) design horsepower determined in Step 2. TABLE 1 Service Factor Operating onditions.8 Uniform not more than 15 minutes in 2 hours. 1.0 Moderate Shock not more than 15 minutes in 2 hours. Uniform not more than 10 hours per day. Moderate Shock not more than 10 hours per day. Uniform more than 10 hours per day Heavy Shock not more than 15 minutes in 2 hours. Moderate Shock more than 10 hours per day Heavy Shock not more than 10 hours per day. 2.0 Heavy Shock more than 10 hours per day. Heavy shock loads and/or severe wear conditions may require the use of higher service factors. onsultation with factory is recommended in these applications. P-1930-BG 2/18 Boston Gear

12 Miter Gears Steel & Iron Straight Tooth (1:1 Ratio) L-Series Unhardened Steel HLK Series Hardened Steel (Teeth only) OA Series ast Iron APPROXIMATE HP & TORQUE* RATINGS FOR LASS I SERVIE (Service Factor = 1.0) atalog 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM Number Pitch HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque L110Y L111Y L101Y L125Y L126Y HLK110Y L112Y L102Y L127Y L119Y L120Y L121Y L133Y HLK101Y L113Y HLK102Y L103Y L128Y L129Y L114Y HLK121Y L130Y L104Y L131Y HLK103Y HLK129Y OA828Y L105Y-A L115Y L116Y HLK114Y OA832Y HLK104Y HLK130Y HLK131Y Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating. NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only. *Torque (Lb. Ins.) Output Rating HP (Input) 80 Boston Gear P-1930-BG 2/18

13 Miter Gears Steel & Iron Straight Tooth (1:1 Ratio) L-Series Unhardened Steel HLK Series Hardened Steel (Teeth only) OA Series ast Iron APPROXIMATE HP & TORQUE* RATINGS FOR LASS I SERVIE (Service Factor = 1.0) atalog 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM Number Pitch HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque L106Y L117Y L132Y OA624Y L123Y HLK105YA HLK115Y HLK116Y L107Y L118Y OA630Y OA525Y L134Y L135Y HLK106Y HLK117Y HLK132Y OA636Y HLK123Y L108Y L122Y L136Y HLK107Y HLK118Y OA424Y OA540Y L109Y L137Y L138Y HLK108Y HLK122Y HLK109Y Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating. NOTE: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only. *Torque (Lb. Ins.) Output Rating HP (Input) P-1930-BG 2/18 Boston Gear

14 Bevel Gears Steel & Iron Straight Tooth L-Series/PA Series Pinions Unhardened Steel PA Series ast Iron HL Series Hardened Steel (Teeth Only) APPROXIMATE HP & TORQUE* RATINGS FOR LASS I SERVIE (Service Factor = 1.0) atalog 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM Number Pitch Ratio HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque L146Y HL146Y L151Y / HL151Y L153Y HL153Y L148Y HL148Y L149Y L150Y HL150Y HL149Y PA3212Y PA4212Y L152Y PA5210Y HL152Y L155Y PA528Y L156Y HL155Y PA626Y PA625Y PA726Y L158Y PA826Y HL156Y PA824Y HL158Y PA3316Y PA45312Y PA6310Y PA638Y 8 3: L157Y PA7536Y PA935Y PA4416Y PA6412Y PA6410Y 10 4: PA848Y PA948Y PA6616Y 16 6: PA6612Y Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating. *Torque (Lb. Ins.) Output Rating HP (Input) RPM of Pinion 82 Boston Gear P-1930-BG 2/18

15 Steel Spiral Miter & Bevel Gears Steel Spiral Miter Gears (1:1 Ratio) LSA Series Unhardened Steel HLSK Series Hardened Steel (Teeth Only) APPROXIMATE HP & TORQUE* RATINGS FOR LASS I SERVIE (Service Factor = 1.0) atalog 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM Number Pitch HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque LSA110Y LSA101Y LSA102Y HLSK110Y HLSK101Y LSA103Y HLSK102Y LSA104Y LSA105YA HLSK103Y LSA106Y LSA107Y LSA118Y HLSK104Y HLSK105YA LSA122Y HLSK106Y HLSK107Y HLSK118Y HLSK122Y APPROXIMATE HP & TORQUE* RATINGS FOR LASS I SERVIE (Service Factor = 1.0) atalog 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM Number Pitch HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque HP Torque SS SH SS SS SH SS SH SH SS SS SH SH Ratings are based on strength calculation. Basic Static Strength Rating, or for hand operation of above gears is approximately 3 times the 100 RPM rating. *Torque (Lb. Ins.) Output Rating HP (Input) Note: Ratings to right of heavy line are not recommended, as pitch line velocity exceeds 1000 feet per minute. Use for interpolation purposes only. **Ratings reflect Gear and Pinion sets. Pinion RPM Steel Spiral Bevel Gears** ( Ratio) SS-Series Unhardened Steel SH Series Hardened Steel (Teeth Only) P-1930-BG 2/18 Boston Gear

16 Notes 84 Boston Gear P-1930-BG 2/18

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