Helical Gears. Section Contents

Size: px

Start display at page:

Download "Helical Gears. Section Contents"

Melissa Carr
6 years ago
Views:

Section Contents CATALOG NUMER / DIMENSIONS... 64-65 SELECTION PROCEDURE... 66 HORSEPOWER & TORQUE RATINGS.

1 Section Contents CATALOG NUMER / DIMENSIONS SELECTION PROCEDURE HORSEPOWER & TORQUE RATINGS STOCK ALTERED / CUSTOM HELICAL GEARS HELICAL GEAR ENGINEERING INFORMATION P-1930-G 9/17 oston Gear

2 24 through 10 Transverse Diametral Pitch (Steel Hardened) 14-1/2 Normal Pressure Angle 45 Helix Angle These gears are hardened all over, except as noted. Teeth on all steel gears are polished. ALL DIMENSIONS IN INCHES ORDER Y CATALOG NUMER OR ITEM CODE FACE PITCH DIA. STANDARD TOLERANCES DIMENSION TOLERANCE ORE All ±.0005 REFERENCE PAGES Alterations 322 Horsepower Ratings 67 Lubrication 322 Materials 323 Selection Procedure 66 ORE KEYWAY NOTE: Normal Diametral Pitch is equal to the Transverse Diametral Pitch divided by the cosine of the Helix Angle. No. Style See RIGHT HAND LEFT HAND of Pitch Page Catalog Item Catalog Item Teeth Dia. ore Keyway 323 Number Code Number Code 24 Face: 8-15 Teeth = Teeth = * H2408R H2408L ** H2410R H2412R H2410L H2412L H2415R H2415L A H2418R H2418L H2420R H2420L H2424R H2424L H2430R H2430L H2436R H2436L H2448R H2448L H2460R H2460L H2472R H2472L Face: 8-15 Teeth = Teeth = H2008R H2008L ** H2010R H2010L H2012R H2012L H2015R H2015L A H2020R H2020L H2025R H2025L H2030R H2030L /16 x 3/32 H2040R H2050R H2040L H2050L H2060R H2060L Face = /16 x 1/32 H1612R H1612L H1616R H1616L H1620R H1620L A H1624R H1632R H1624L H1632L H1640R H1640L H1648R H1648L Face = H1212R H1212L H1215R H1215L A H1218R H1224R H1218L H1224L H1230R H1230L H1236R H1236L Face = /16 x 1/32 H1008R H1008L H1010R H1010L H1012R H1012L A H1015R H1015L H1020R H1020L /16 x 3/32 H1025R H1025L H1030R H1030L H1040R H1040L *1/16 wide x.04 deep slot cut on end of gear for drive pin, not key. **3/32 wide x.06 deep slot cut on end of gear for drive pin, not key. Teeth only hardened. 64 oston Gear P-1930-G 9/17

3 All gears with hubs have setscrew at 90 to keyway. Steel gears have teeth only hardened, except as noted. Teeth on all steel gears are polished. ALL DIMENSIONS IN INCHES ORDER Y CATALOG NUMER OR ITEM CODE Helical Gears 8 and 6 Transverse Diametral Pitch (ronze & Steel Hardened) 14-1/2 Normal Pressure Angle 45 Helix Angle Style No. Hub See RIGHT HAND LEFT HAND of Pitch Page Catalog Item Catalog Item Teeth Dia. ore Dia. Proj. Keyway 323 Number Code Number Code 8 Face without Hubs = with Hubs =.750 Overall Length = Face + Hub Proj. STEEL HARDENED H808R * H808L * H810R * H810L * H812R H812L A H816R H816L H820R H820L /16 x 3/32 H824R H824L H832R H832L HS808R* HS808L * HS810R * HS810L * /16 x 3/32 HS812R * HS812L * HS816R HS816L A HS820R HS820L /4 x 1/8 HS824R HS824L HS832R HS832L HS840R HS840L HS848R HS848L RONZE H808R H808L H810R H810L /16 x 3/32 A H812R H812L H816R H816L H820R H820L /4 x 1/8 H824R H824L H832R H832L H840R H840L H848R H848L Face without Hubs = with Hubs = Overall Length = Face + Hub Proj. STEEL HARDENED H608R H608L /16 x 3/32 H610R H610L A H612R H612L /4 x 1/8 H615R H615L H618R H618L H624R H624L HS608R HS608L /16 x 3/32 HS609R HS610R HS609L HS610L /4 x 1/8 HS612R HS612L HS615R HS615L A HS618R HS618L /16 x 5/32 HS620R HS620L HS624R HS624L HS630R HS630L HS636R HS636L RONZE /4 x 1/8 H612R H612L A H615R H615L H618R H618L /16 x 5/32 H620R H620L H624R H624L H630R H630L H636R H636L *Hardened all over. PITCH DIA. FACE REFERENCE PAGES HU PROJ. ORE STANDARD TOLERANCES DIMENSION TOLERANCE ORE All ±.0005 Alterations 322 Horsepower Ratings 67, 68 Lubrication 322 Materials 323 Selection Procedure 66 OVERALL LENGTH KEYWAY HU DIA. SETSCREW NOTE: Normal Diametral Pitch is equal to the Transverse Diametral Pitch divided by the cosine of the Helix Angle. P-1930-G 9/17 oston Gear

4 oston standard stock helical gears are made with a 45 helix angle to transmit motion and/or power between non-intersecting shafts that are parallel or at 90 to each other. They are stocked both right and left-handed. For parallel shaft operation, helical gears having opposite hand helix angles are required, while for shafts at 90 the same hand helix must be used. For parallel shaft applications, helical gears provide overlapping tooth contact. This results in a smoother, quieter operation and higher horsepower capacity than afforded by spur gears of comparable size. For 90 shaft applications, the tooth contact area is very small which considerably limits the load capacity. Horsepower ratings are not tabulated in this catalog, for 90 applications. oston helical gears are top hobbed, resulting in extremely close concentricity between the pitch diameter and the outside diameter. Selection Procedure Approximate horsepower and torque ratings for selected sizes (numbers of teeth) at various operating speeds (RPM) are given for hardened steel helical gears. The ratings are based on the beam strength of the gear tooth. These ratings are for parallel shaft applications under normal operating conditions, that is: properly mounted and lubricated, carrying a smooth load for not more than 10 hours per day or a moderate shock load not more than 15 minutes in two hours (Service Factor 1.0). Refer to Table 1, below, for other types of service. Ratings for gear sizes or speeds not listed may be interpolated from the values indicated. Pitchline velocities are limited as reflected by the lack of ratings for larger numbers of teeth at higher RPM s in the selection chart. Application in this area is not recommended. Ref. Parallel shafts are approximately 98% efficient 90 shafts are approximately 50% efficient Horsepower ratings for bronze gears are approximately 33% of these ratings. 1. Determine service factor. a. Using Application Classification Chart I, pages determine service factor or b. With knowledge of operating conditions and load classification, select service factor from Table Determine Design Horsepower. Design HP = Application Load Service Factor (Table 1) 3. Select pinion with horsepower capacity equal to (or greater than) design horsepower determined in Step 2. Reference Rating Pages 67, Select a driven gear with a catalog rating equal to (or greater than) the horsepower determined in Step 2. Service Factor TALE 1 Operating Conditions.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. Consultation with factory is recommended in these applications. 66 oston Gear P-1930-G 9/17

5 Approximate Horsepower and Torque* Ratings For Class I Service (Service Factor = 1.0) No. 25 RPM 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM 3600 RPM Teeth H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque 24 DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL.500 FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL.750 FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL.875 FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL.750 FACE Ratings are based on strength calculation. asic 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 exceed 1500 Feet per Minute and should be used for interpolation purposes only. *Torque Rating (Lb. Ins.) P-1930-G 9/17 oston Gear

6 Approximate Horsepower and Torque* Ratings For Class I Service (Service Factor = 1.0) No. 25 RPM 50 RPM 100 RPM 200 RPM 300 RPM 600 RPM 900 RPM 1200 RPM 1800 RPM 3600 RPM Teeth H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. Torque H.P. 8 DIAMETRAL PITCH NORMAL DIAMETRAL PITCH HARDENED STEEL FACE DIAMETRAL PITCH NORMAL DIAMETRAL PITCH RONZE.750 FACE DIAMETRAL PITCH 8.48 NORMAL DIAMETRAL PITCH HARDENED STEEL FACE DIAMETRAL PITCH 8.48 NORMAL DIAMETRAL PITCH HARDENED STEEL FACE DIAMETRAL PITCH 8.48 NORMAL DIAMETRAL PITCH RONZE FACE Torque Ratings are based on strength calculation. asic 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 exceed 1500 Feet per Minute and should be used for interpolation purposes only. *Torque Rating (Lb. Ins.) 68 oston Gear P-1930-G 9/17

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

MITER GEARS SPIRAL MITER GEARS BEVEL GEARS SPIRAL BEVEL GEARS SELECTION PROCEDURE...79 MITER GEARS... Miter & Bevel Gears Section ontents ATALOG NUMBER / IMENSIONS MITER GEARS... 70-72 SPIRAL MITER GEARS... 73 BEVEL GEARS... 74-77 SPIRAL BEVEL GEARS... 78 SELETION PROEURE...79 HORSEPOWER AN TORQUE RATINGS