Boston Gear®

Brands

Boston Gear® (7521) Brands Boston+Gear%26reg%3B Boston Gear®

Manufacturer

Altra Industrial Motion (7521) Manufacturer Altra+Industrial+Motion Altra Industrial Motion

Category

AC Motors (6) Category AC+Motors AC Motors
Bars, Discs, Plates & Strips (85) Category Bars%2C+Discs%2C+Plates+%26+Strips Bars, Discs, Plates & Strips
Bearing Replacement Parts (3) Category Bearing+Replacement+Parts Bearing Replacement Parts
Bearing Rollers (26) Category Bearing+Rollers Bearing Rollers
Change Gears (471) Category Change+Gears Change Gears
Compressed Air Preparation Filters (8) Category Compressed+Air+Preparation+Filters Compressed Air Preparation Filters
Flange Mount Ball Bearing Units (145) Category Flange+Mount+Ball+Bearing+Units Flange Mount Ball Bearing Units
Gear Racks (53) Category Gear+Racks Gear Racks
Helical Gears (182) Category Helical+Gears Helical Gears
Helical Inline Drives (681) Category Helical+Inline+Drives Helical Inline Drives
Helical Offset Drives/Ratio Multipliers (45) Category Helical+Offset+Drives%2FRatio+Multipliers Helical Offset Drives/Ratio Multipliers
Helical Worm Right Angle Drives (276) Category Helical+Worm+Right+Angle+Drives Helical Worm Right Angle Drives
Internal Gears (37) Category Internal+Gears Internal Gears
Jaw Coupling Hubs (44) Category Jaw+Coupling+Hubs Jaw Coupling Hubs
Jaw Coupling Spiders & Elements (21) Category Jaw+Coupling+Spiders+%26+Elements Jaw Coupling Spiders & Elements
Jaw Shaft Couplings - Complete (21) Category Jaw+Shaft+Couplings+-+Complete Jaw Shaft Couplings - Complete
Non-Helical Worm Right Angle Drives (1970) Category Non-Helical+Worm+Right+Angle+Drives Non-Helical Worm Right Angle Drives
Pillow Block Ball Bearing Units (91) Category Pillow+Block+Ball+Bearing+Units Pillow Block Ball Bearing Units
Pillow Block Plain Sleeve Bearing Units (21) Category Pillow+Block+Plain+Sleeve+Bearing+Units Pillow Block Plain Sleeve Bearing Units
Pin & Block Universal Joints (44) Category Pin+%26+Block+Universal+Joints Pin & Block Universal Joints
Pinion Wires (51) Category Pinion+Wires Pinion Wires
Plain Sleeve & Flanged Bearings (812) Category Plain+Sleeve+%26+Flanged+Bearings Plain Sleeve & Flanged Bearings
Plain Thrust Bearing Washers (39) Category Plain+Thrust+Bearing+Washers Plain Thrust Bearing Washers
Plastic Bearings & Bushings (343) Category Plastic+Bearings+%26+Bushings Plastic Bearings & Bushings
Pneumatic Mufflers & Vents (3) Category Pneumatic+Mufflers+%26+Vents Pneumatic Mufflers & Vents
Shaft Mount/Torque Arm Offset Drives (115) Category Shaft+Mount%2FTorque+Arm+Offset+Drives Shaft Mount/Torque Arm Offset Drives
Spiral Bevel Gears & Pinions (24) Category Spiral+Bevel+Gears+%26+Pinions Spiral Bevel Gears & Pinions
Spiral Bevel Right Angle Drives (60) Category Spiral+Bevel+Right+Angle+Drives Spiral Bevel Right Angle Drives
Spiral Miter Gears (40) Category Spiral+Miter+Gears Spiral Miter Gears
Spur Gears (1093) Category Spur+Gears Spur Gears
Stem Pinions (27) Category Stem+Pinions Stem Pinions
Straight Bevel Gears & Pinions (114) Category Straight+Bevel+Gears+%26+Pinions Straight Bevel Gears & Pinions
Straight Miter Gears (95) Category Straight+Miter+Gears Straight Miter Gears
Worm Gears (351) Category Worm+Gears Worm Gears
Worms (124) Category Worms Worms

Base to Bore Centerline

Bolt Center-to-Center Length

Bolt Circle Diameter

2-1/2 in (4) Bolt Circle Diameter 2-1%2F2+in 2-1/2 in
2-13/16 in (2) Bolt Circle Diameter 2-13%2F16+in 2-13/16 in
3 in (6) Bolt Circle Diameter 3+in 3 in
3-9/16 in (8) Bolt Circle Diameter 3-9%2F16+in 3-9/16 in
3-15/16 in (5) Bolt Circle Diameter 3-15%2F16+in 3-15/16 in

Bore Diameter

Bore Size

Coupling Size

FC12 (7) Coupling Size FC12 FC12
FC15 (9) Coupling Size FC15 FC15
FC20 (11) Coupling Size FC20 FC20
FC25 (10) Coupling Size FC25 FC25
FC30 (10) Coupling Size FC30 FC30
FC38 (10) Coupling Size FC38 FC38
FC45 (8) Coupling Size FC45 FC45

Diameter

Diametral Pitch

Direction of Rotation

Left Hand (166) Direction of Rotation Left+Hand Left Hand
Right Hand (610) Direction of Rotation Right+Hand Right Hand

Enclosure Type

Open Drip-Proof (1) Enclosure Type Open+Drip-Proof Open Drip-Proof
Totally Enclosed Fan Cooled (3) Enclosure Type Totally+Enclosed+Fan+Cooled Totally Enclosed Fan Cooled

Face Width

Flange Diameter

Flange Mounting Type

2-Bolt (45) Flange Mounting Type 2-Bolt 2-Bolt
3-Bolt (25) Flange Mounting Type 3-Bolt 3-Bolt
4-Bolt (60) Flange Mounting Type 4-Bolt 4-Bolt
4-Bolt Piloted (15) Flange Mounting Type 4-Bolt+Piloted 4-Bolt Piloted

Frame

56C (3) Frame 56C 56C
182TC/184TC (1) Frame 182TC%2F184TC 182TC/184TC

Frequency Rating

60 Hz (4) Frequency Rating 60+Hz 60 Hz

Gear Ratio

Gear Type

Bevel (57) Gear Type Bevel Bevel
Bevel Pinion (57) Gear Type Bevel+Pinion Bevel Pinion

Horsepower

Hub Diameter

1 in (4) Hub Diameter 1+in 1 in
1-1/4 in (6) Hub Diameter 1-1%2F4+in 1-1/4 in
1-3/4 in (8) Hub Diameter 1-3%2F4+in 1-3/4 in
2-1/4 in (7) Hub Diameter 2-1%2F4+in 2-1/4 in
2-3/4 in (7) Hub Diameter 2-3%2F4+in 2-3/4 in
3-1/2 in (7) Hub Diameter 3-1%2F2+in 3-1/2 in
4 in (5) Hub Diameter 4+in 4 in

Input Type

Inside Diameter

Lead Angle

Length

9/16 in (6) Length 9%2F16+in 9/16 in
5/8 in (2) Length 5%2F8+in 5/8 in
7/8 in (2) Length 7%2F8+in 7/8 in
1 in (10) Length 1+in 1 in
1-1/4 in (2) Length 1-1%2F4+in 1-1/4 in
1-1/2 in (2) Length 1-1%2F2+in 1-1/2 in
1-3/4 in (1) Length 1-3%2F4+in 1-3/4 in
2 in (1) Length 2+in 2 in

Length Through Bore

27/32 in (3) Length Through Bore 27%2F32+in 27/32 in
1-1/32 in (5) Length Through Bore 1-1%2F32+in 1-1/32 in
1-4/16 in (7) Length Through Bore 1-4%2F16+in 1-4/16 in
1-19/32 in (6) Length Through Bore 1-19%2F32+in 1-19/32 in
2-5/32 in (6) Length Through Bore 2-5%2F32+in 2-5/32 in
2-5/8 in (6) Length Through Bore 2-5%2F8+in 2-5/8 in
3 in (4) Length Through Bore 3+in 3 in

Material

Maximum Speed

100 rpm (1) Maximum Speed 100+rpm 100 rpm
300 rpm (1) Maximum Speed 300+rpm 300 rpm
690 rpm (1) Maximum Speed 690+rpm 690 rpm
870 rpm (1) Maximum Speed 870+rpm 870 rpm
1150 rpm (1) Maximum Speed 1150+rpm 1150 rpm
1750 rpm (6) Maximum Speed 1750+rpm 1750 rpm
2000 rpm (44) Maximum Speed 2000+rpm 2000 rpm
3450 rpm (31) Maximum Speed 3450+rpm 3450 rpm

Mounting Type

F-1 (4) Mounting Type F-1 F-1

Number of Teeth

Number of Threads

1 (232) Number of Threads 1 1
2 (136) Number of Threads 2 2
4 (107) Number of Threads 4 4

Output Maximum Speed

Output Type

Hollow Bore Shaft (60) Output Type Hollow+Bore+Shaft Hollow Bore Shaft
Hollow Shaft (424) Output Type Hollow+Shaft Hollow Shaft
Projecting Shaft (98) Output Type Projecting+Shaft Projecting Shaft
Removable Projection Shaft (1) Output Type Removable+Projection+Shaft Removable Projection Shaft
Solid Projecting Shaft (1999) Output Type Solid+Projecting+Shaft Solid Projecting Shaft
Solid Shaft (478) Output Type Solid+Shaft Solid Shaft

Outside Diameter

Overall Height

Overall Length

Overall Length/Diameter

Phase

1 (1) Phase 1 1
3 (3) Phase 3 3

Pitch Diameter

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