See Chapter 15 of the text You will design the main components of a single reduction spur gear type speed reducer , similar to the one in Section 15 5 Submit your project as a Formal Report Speed Reducer Specifications Pinion and gear must transmit 25 HP Pinion speed is 2000 RPM and gear speed is 500 RPM The gear ratio is 4 1 Design Requirements Design a pinion and gear to transmit 25 HP with a pinion speed of 2000 RPM and a gear speed of 500 RPM The gear ratio is 4 1 Design for strength and pitting resistance to achieve approximately 20,000 hours of life with a reliability of at least 99 9 Design two shafts, one for the pinion and one for the gear Provide positive axial location for the gears on the shaft The input shaft must be designed to extend beyond the housing to enable the motor shaft to be coupled to it The output shaft must accommodate a coupling that mates with the drive shaft of the saw Use a design reliability of 99 9 Specify four commercially available rolling contact bearings, two for each shaft The L 10 design life should be 20,000 hours Project Deliverables Introduction In one well written paragraph, summarize the function of this single reduction spur gear type speed reducer , inspired by Section 15 5 in the text For the pinion and gear, provide the following data in one table Use proper units Diametral Pitch Number of teeth on pinion Number of teeth on gear Diameter of pinion in Diameter of gear in Center distance in Face width in Tangential force lbf Required bending stress number for pinion psi Required contact stress number for pinion psi Material of construction Drawings of pinion and gear are not required For the shafts, provide the following data and figures Input shaft geometry, loads, shearing force, bending moment, and torque diagrams in one figure (See Figure 15 4 in the text ) Output shaft geometry, loads, shearing force, bending moment, and torque diagrams in one figure (See Figure 15 4 in the text ) In one data table, specify the following for both the input shaft and the output shaft Support reactions bearing forces lbf Maximum bending moment lbf in Maximum torque lbf in Material of construction Design factor Minimum allowable shaft diameters in Provide an engineering drawing of the input shaft See Figure 15 6 and 15 7 in the text You do not have to include keyway detail, since key design is not part of this project For the bearings, provide the following in one data table Input shaft design life rev Input shaft required basic dynamic load rating lbf Input shaft specified bearings Output shaft design life rev Output shaft required basic dynamic load rating lbf Output shaft specified bearings Summary In one well written paragraph per subject, summarize the work done to specify the pinion gear system, complete the initial design of the input and output shafts, and specify the rolling contact bearings Answer the following questions as well Why is it so important to apply thepropersafety design factor in the design stage, and how does this affect society If you were an engineer working for a company and you noticed a co worker made a mistake on a drawing that could impact the safety of the design, what would you do Appendix Include the following A screenshot of every completed spreadsheet used in this project Label each screenshot so as to describe the purpose of the calculations An example of every calculation performed by hand on this project Label each calculation to describe its purpose Neat, handwritten work is acceptable here Proper display of units is required

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See Chapter 15 of the text.You will design the main components of a single-reduction spur gear-type speed reducer , similar to the one in Section

See Chapter 15 of the text.You will design the main components of a single-reduction spur gear-type speed reducer, similar to the one in Section 15-5. Submit your project as a Formal Report.

Speed Reducer Specifications

Pinion and gear must transmit 25 HP.
Pinion speed is 2000 RPM and gear speed is 500 RPM. The gear ratio is 4:1.

Design Requirements

Design a pinion and gear to transmit 25 HP with a pinion speed of 2000 RPM and a gear speed of 500 RPM. The gear ratio is 4:1. Design for strength and pitting resistance to achieve approximately 20,000 hours of life with a reliability of at least 99.9%
Design two shafts, one for the pinion and one for the gear. Provide positive axial location for the gears on the shaft. The input shaft must be designed to extend beyond the housing to enable the motor shaft to be coupled to it. The output shaft must accommodate a coupling that mates with the drive shaft of the saw. Use a design reliability of 99.9%
Specify four commercially available rolling contact bearings, two for each shaft.The L₁₀ design life should be 20,000 hours.

Project Deliverables

Introduction - In one well-written paragraph, summarize the function of this single-reduction spur gear-type speed reducer, inspired by Section 15-5 in the text.
For the pinion and gear, provide the following data in one table. Use proper units.
- Diametral Pitch
- Number of teeth on pinion
- Number of teeth on gear
- Diameter of pinion [in]
- Diameter of gear [in]
- Center distance [in]
- Face width [in]
- Tangential force [lbf]
- Required bending stress number for pinion [psi]
- Required contact stress number for pinion [psi]
- Material of construction
- Drawings of pinion and gear are not required
For the shafts, provide the following data and figures:
- Input shaft: geometry, loads, shearing force, bending moment, and torque diagrams in one figure. (See Figure 15-4 in the text.)
- Output shaft: geometry, loads, shearing force, bending moment, and torque diagrams in one figure. (See Figure 15-4 in the text.)
- In one data table, specify the following for both the input shaft and the output shaft:
  - Support reactions - bearing forces [lbf]
  - Maximum bending moment [lbf-in]
  - Maximum torque [lbf-in]
  - Material of construction
  - Design factor
  - Minimum allowable shaft diameters [in]
- Provide an engineering drawing of the input shaft. See Figure 15-6 and 15-7 in the text. You do not have to include keyway detail, since key design is not part of this project.
For the bearings, provide the following in one data table:
- Input shaft: design life [rev]
- Input shaft: required basic dynamic load rating [lbf]
- Input shaft: specified bearings
- Output shaft: design life [rev]
- Output shaft: required basic dynamic load rating [lbf]
- Output shaft: specified bearings
Summary - In one well-written paragraph per subject, summarize the work done to specify the pinion-gear system, complete the initial design of the input and output shafts, and specify the rolling contact bearings. Answer the following questions as well:
- Why is it so important to apply thepropersafety/design factor in the design stage, and how does this affect society?
- If you were an engineer working for a company and you noticed a co-worker made a mistake on a drawing that could impact the safety of the design, what would you do?

Appendix- Include the following:
- A screenshot of every completed spreadsheet used in this project. Label each screenshot so as to describe the purpose of the calculations.
- An example of every calculation performed by hand on this project. Label each calculation to describe its purpose.Neat, handwritten work is acceptable here. Proper display of units is required.