1. Catalogs
  2. Harmonic Drive LLC
  3. HPF Hollow Shaft Gear Unit
cad

HPF Hollow Shaft Gear Unit

HPF Hollow Shaft Gear Unit
1 / 13 PagesView full catalog

HPF Hollow Shaft Gear Unit

Product catalog summary
Overview: The document provides comprehensive technical specifications and performance characteristics of the HPF Hollow Shaft Gear Unit and the HPG Series Input Shaft Gear Unit. These units are designed for high precision and reliability, featuring innovative designs to maintain low backlash and high torsional stiffness.
Specifications: The HPF Hollow Shaft Gear Unit is available in sizes 25 and 32, with a reduction ratio of 11:1. Peak torque is 100Nm for size 25 and 220Nm for size 32. The inside diameter of the hollow shaft is Ø25mm for size 25 and Ø30mm for size 32. The gear units maintain low backlash, less than 3 arc-min, throughout their lifespan.
Design Features: The gear units incorporate a cross roller bearing integrated with the output flange, providing high moment stiffness and load capacity. The hollow shaft design allows for the passage of cables, pipes, or shafts through the axis of rotation, enhancing design simplicity and reliability.
Performance and Ratings: A rating table details performance metrics such as rated torque at different speeds, limits for repeated peak torque, and maximum input speeds. The gear units are designed to operate efficiently under specified conditions, considering heat generation and environmental factors.
Backlash and Torsional Stiffness: The document explains the calculation of torsional stiffness and backlash, emphasizing the importance of maintaining low backlash for precision. The torsional stiffness curve is generated by applying torque in a specific sequence, and hysteresis loss is defined as the backlash of the HPF series.
Outline Dimensions: Detailed dimensions for the HPF-25 and HPF-32 models are provided, including mounting specifications and tolerance ranges, critical for ensuring proper installation and operation.
Conclusion: The HPF Hollow Shaft Gear Unit and HPG Series Input Shaft Gear Unit are engineered for high performance and precision, suitable for applications requiring reliable and consistent operation. The document provides comprehensive technical data to support the selection and application of these gear units.
Procedures: Detailed procedures for selecting suitable gear unit sizes, checking the life and static safety coefficient of bearings, and calculating average input speeds are provided. It emphasizes ensuring that maximum input speeds and torques are within specified limits.
Norms and Standards: Norms for calculating maximum load moment, axial, and radial loads are included, ensuring they do not exceed permissible limits. The document specifies how to calculate the life of bearings and check against specification requirements.
Recommendations: Recommendations include using innovative ring gear designs for consistent low backlash and ensuring high load capacity and precise positioning accuracy with cross roller bearings. The document advises on maintaining performance by checking maximum loads and life of bearings.
Technical Data and Calculations: Technical data sections provide formulas and tables for calculating average loads, input speeds, and bearing life. Specific formulas for dynamic and static load ratings, moment stiffness, and allowable loads are included.
Key Tables and Figures: Tables and figures detail specifications for input and output bearings, including basic dynamic and static load ratings, allowable moment, axial, and radial loads, and moment stiffness values, crucial for ensuring safe and efficient operation.
Specifications and Procedures: Specifications and procedures for calculating the life and load capacities of cross roller bearings are outlined. Proper lubrication is emphasized, especially at ultra-low speeds, to prevent bearing deterioration or increased load on the driving side.
Load Calculations: Detailed formulas and methods for calculating average radial load, average axial load, and average output rotational frequency are provided. Specific formulas for determining the life of the cross roller bearing during oscillating movements and for calculating dynamic equivalent radial loads are included.
Life Calculation: Life calculations are based on average loads, essential for ensuring the longevity of the bearings. The document specifies how to calculate the static safety coefficient and provides general values under normal operating conditions.
Load Status and Safety Coefficients: The importance of converting fluctuating radial and axial loads into average loads to check the life of the bearings is discussed. The static safety coefficient and load coefficients are crucial for determining permissible limits of static equivalent loads.
Recommendations: For operations involving small oscillating angles, the document warns about the difficulty in generating an oil film on the contact surface, which may lead to fretting. Users are advised to contact the manufacturer if such issues arise.
Tables and Figures: Several tables and figures provide detailed specifications and diagrams for understanding load influences and bearing specifications.
Input Shaft Bearing Specifications: Specifications for input shaft bearings include basic rated load, basic dynamic rated load, and basic static rated load. Allowable loads for different sizes are detailed, with specific notes on axial and radial load tolerances for HPG series bearings.
Load Calculations: Formulas to calculate maximum load moment, axial load, and radial load on the input shaft are provided, ensuring they do not exceed permissible limits. Instructions for calculating average moment load, average axial load, and average input rotational frequency are included.
Bearing Life Calculation: The procedure to calculate the life of the input side bearing using specific formulas and tables is outlined. Steps for checking maximum load and bearing life, emphasizing the conversion of fluctuating loads into average loads for accurate life assessment, are included.
Technical Data and References: References to various tables and figures are provided for detailed specifications and load influence diagrams. Several formulas and graphs assist in calculations and understanding load dynamics.
Company Information: The document concludes with contact information for Harmonic Drive Systems, Inc., including addresses and phone numbers for various offices worldwide.
See more

Catalog excerpts

HPF Hollow Shaft Gear Unit-1

HPF Hollow Shaft Gear Unit HPF Hollow Shaft Gear Unit 2 Peak torque Standard: <3 arc-min Low Backlash for Life Innovative ring gear automatically adjusts for backlash, ensuring consistent, low backlash for the life of the gearhead. The ring gear design automatically provides the optimum backlash in the planetary gear train and maintains the same low backlash for the life of the gearhead. High Load Capacity Output Bearing A Cross Roller bearing is integrated with the output flange to provide high moment stiffness, high load capacity and precise positioning accuracy. Based on Harmonic Planetary® gearhead design concept, the hollow shaft planetary features the same superior performance and specifications as the HPG line. The large hollow shaft allows cables, pipes, or shafts to pass directly through the axis of rotation, simplifying the design and improving reliability. CONTENTS Rating Table, Performance……………………….2 Backlash and Torsional Stiffness ………………..3 Outline Dimensions………………………………4 Product Sizing & Selection……………………..5-6 Model Name Hollow Shaft Design Revision Reduction Ratio Output Configuration F0: Flange output Input Configuration Options None Standard item : SP : Special specification U1: Hollow shaft type Gearhead Construction Output rotational direction Angular bearing Input side oil seal Input Shaft Gear Unit Input Shaft Gear Unit Output side oil seal Mounting bolt hole Mounting pilot Cross roller bearing Input Shaft Gear Unit Input Shaft Gear Unit Hollow Shaft Gear Unit Hollow Shaft Gear Unit Hollow Shaft Gear Unit Hollow Shaft Gear Unit Inside diameter of the hollow shaft Input rota

 Open the catalog to page 1
HPF Hollow Shaft Gear Unit-2

Unit Type Hollow Shaft Gear Unit Unit HPF Hollow Shaft Gear HPF Rating Table HPF series (Hollow Shaft Type) The HPF hollow shaft planetary gear features a large hollow shaft that allows cables, shafts, ball screws or lasers to pass directly through the axis of rotation. Size Limit for Repeated Peak Torque *3 Limit for Momentary Torque *4 Max. Average Input Speed *5 Input Moment of Inertia Unit Type HPG series (Input Shaft Type) Rated torque is based on L10 life of 20,000 hours when input speed is 2000 rpm Rated torque is based on L10 life of 20,000 hours when input speed is 3000 rpm The limit...

 Open the catalog to page 2
HPF Hollow Shaft Gear Unit-3

Unit Type Hollow Shaft Gear Unit Unit HPF Hollow Shaft Gear HPF Backlash and Torsional Stiffness Size Reduction Ratio Torsional stiffness Backlash (Hysteresis Loss) ● Calculation formula θ=D+ Total torsion angle Torsion angle on one side at output torque x 0.15 torque Load torque Output torque x 0.15 torque (=TRX0.15) Torsional stiffness Hysteresis loss = Backlash TR: Rated output torque A/B: Torsional stiffness D: Torsion on one side at TRX0.15 Input Shaft Gear Unit Input Shaft Gear Unit Hollow Shaft Gear Unit Hollow Shaft Gear Unit Input Shaft Gear Unit Hollow Shaft Gear Unit The method to...

 Open the catalog to page 3
HPF Hollow Shaft Gear Unit-4

Unit Type Hollow Shaft Gear Unit Unit HPF Hollow Shaft Gear HPF HPF series (Hollow Shaft Type) Only primary dimensions are shown in the drawings below. Refer to the confirmation drawing for detailed dimensions. For the specifications of the input side bearing of the hollow shaft gear unit, refer to page 133. Output (Low speed side) (Use caution regarding bolt length and interference) Input (High speed side) Unit Type (For mounting output load) (Note) The dimension tolerances that are not specified vary depending on the manufacturing method. Please check the confirmation drawing or contact us for...

 Open the catalog to page 4
HPF Hollow Shaft Gear Unit-5

Unit Type Hollow Shaft Gear Unit Unit HPF Hollow Shaft Gear HPF Product Sizing & Selection HPF series (Hollow Shaft Type) To fully utilize the excellent performance of the HPF HarmonicPlanetary® gearheads, check your operating conditions and, using the flowchart, select the appropriate size gear for your application. In general, a servo system rarely operates at a continuous load and speed. The input speed, load torque change and a comparatively large torque is applied during start and stop. Unexpected impact torques may also be applied. HPG series (Input Shaft Type) Unit Type Check your operating...

 Open the catalog to page 5
HPF Hollow Shaft Gear Unit-6

HPF series (Hollow Shaft Type) Unit Type Hollow Shaft Gear Unit Unit HPF Hollow Shaft Gear HPF Example of model number Selection Value of each load torque pattern. When impact torque is applied Calculate the average output speed based on the load torque pattern: no av (rpm) no av= Make a preliminary model selection with the following conditions. T av = 30.2 Nm ≦ 48 Nm. (HPF-25A-11 is tentatively selected based on the average load torque (see the rating table on page 95) of size 25 and reduction ratio of 11.) Determine a reduction ratio (R) from the maximum output speed (no max) and maximum input...

 Open the catalog to page 6
HPF Hollow Shaft Gear Unit-7

Planetary Gear Units HPF Series - Hollow Shaft

 Open the catalog to page 7
HPF Hollow Shaft Gear Unit-8

Technical Data Technical Data Technical Data Technical Information / Handling Explanation Input Output Bearing SpecificationsChecking Procedure Bearing Specifications and and Checking Procedure A precision cross roller life of supports the external load (output flange). Check the maximum load and bearingthe bearing on the input side if the reducer is an HPG input shaft unit or an HPF hollow Check the maximum load, moment load, life of the bearing and static safety coefficient to maximize performance. shaft unit. HPG Checking procedure Checking procedure (1) Checking maximum the maximum load moment...

 Open the catalog to page 8
HPF Hollow Shaft Gear Unit-9

Technical Technical Data Technical Data How to calculate the maximum load moment load Technical Information / Handling Explanation Input Bearing Specifications and Checking Procedure HPGP HPG CSG-GH HPF Check the maximum load and life of the bearing on the input side if the reducer is an HPG input shaft unit or an HPF hollow max shaft unit. Calculate: Maximum load moment load (Mi max) Maximum load axial load (Fai max) N (kgf) Max. radial load Fr max Maximum load radial load (Fri max) (2) Checking the life Offset amount Calculate: R Average moment load (Mi av) Average axial load (Fai av) Average...

 Open the catalog to page 9
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.