The task is to design a gearbox as a component for an OEM (Original Equipment Manufacturer).

| April 14, 2018


The task is to design a gearbox as a component for an OEM (Original Equipment Manufacturer). Two
gear stages and three shafts to be used. All three shafts will be on the same plane as shown in
Figure 1. All shafts are ground and polished after machining. The following section lists the
specifications.
Component System Specifications
Some of the specifications will vary. These are referred to as “customised variables” in the following
table. Each student will have a different data set.
Parameter Specified Value
The product Customised variable (defined in your Assignment template)
Gear type Spur gears cut to a pressure angle of 20o.
Type of gearbox Two-stage compound gear train in an enclosed gearbox
Max ratio/stage Maximum reduction ratio of 10.0 for each stage.
Input speed, rpm nin (customised variable)
Output speed, rpm nout (customised variable)
Motor power, kW P (customised variable)
Bearings Select single-row deep-groove ball bearing from Mott , Table 14-3
How to do this Assignment
1. Download your assignment template using the Blackboard link.
2. Design the gearbox and fill in the blank output cells in the template
3. Using the BB link, submit the Excel template with the numerical results
a. Your submission will be automatically marked.
b. Review your mark. Read the feedback report to see where you made mistakes.
c. If you want to, you can try again after correcting your mistakes. If you do, your
Assignment #1 mark will be the weighted average of the two marks.
d. No third submission is allowed.
4. Using the drawing submission link in BB, submit a two-dimensional drawing for the second
shaft in the gearbox
a. Fully dimensioned
b. Fully detailed (e.g. keyways, fillets, chamfers, etc.)
c. The drawings will be marked by your tutors. You will be marked only once.

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