Generation Of Involute Gear Tooth Profile
Product Code : EL-TOML-11025
Quick answer: The generation of involute gear tooth profile board shows how a rack-type cutter generates involute gear teeth. Students trace tooth profiles of module 25 mm on paper for three white acrylic discs of 450, 300 and 200 mm pitch circle diameter, and see interference and undercutting on the smaller gears. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Component | Specification |
|---|---|
| Discs | 3 nos., white acrylic, marked A, B and C |
| Pitch circle diameters | 450 mm (A), 300 mm (B), 200 mm (C) |
| Module | 25 mm |
| Cutter | Rack-type cutter |
| Profile recording | Traced on paper placed between disc and cutter |
How the tooth profile is generated
Most spur gears are cut by generation: a cutter with straight-sided rack teeth rolls against the gear blank, and the envelope of its successive positions forms the involute tooth. The board reproduces this rolling motion at large scale, so the shape can be drawn step by step instead of being hidden inside a machine.
With a 25 mm module, the three discs correspond to gears of 18, 12 and 8 teeth (number of teeth = pitch circle diameter / module). As the number of teeth falls, the rack tip cuts into the tooth flank below the base circle, which is undercutting. Comparing the three traced profiles shows why gears with few teeth are weak at the root and why designers set a minimum tooth number or use profile correction.
- Fix a sheet of paper on the chosen disc, between the disc and the rack cutter.
- Set the rack cutter at its starting position against the disc.
- Move the rack by a small step, roll the disc by the matching angle and trace the cutter outline.
- Repeat until the full tooth space is traced.
- Do the same on the other discs and compare the profiles for undercutting.
Key features
- Three white acrylic discs, A, B and C, of 450, 300 and 200 mm pitch circle diameter
- Rack-type cutter that reproduces the gear generating process
- Large 25 mm module for clear, readable tooth profiles
- Paper tracing gives each student a record of the generated profile
- Shows interference and undercutting on the smaller discs
- Companion to the interference and undercutting demonstration board
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the involute gear tooth profile board at its works in Laxmi Nagar, Delhi, and supplies it to engineering colleges, polytechnics and TVET institutes in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
Related Theory of Machine Lab products
- Vibration Lab Complete 11 Experiment (EL-TOML-11024)
- Interference Undercutting (EL-TOML-11026)
- Cam Analysis Apparatus (EL-TOML-11023)
- Coriolis Component of Acceleration (EL-TOML-11027)
- Whirling of Shaft Apparatus (EL-TOML-11022)
- Slip Creep Measurement Apparatus (EL-TOML-11028)
The full range is in the Theory of Machine Lab section of the Engineering Lab range.
Frequently asked questions
What module and disc sizes does the involute gear tooth profile board use?
A 25 mm module, with three white acrylic discs of 450 mm, 300 mm and 200 mm pitch circle diameter.
How is the tooth profile recorded?
The rack-type cutter outline is traced onto paper placed between the disc and the cutter at each step of the rolling motion.
What is the price of the involute gear tooth profile board?
Prices are not published on the website. Add the involute gear tooth profile board to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-TOML-11025 and the quantity, to receive a quotation.
Does Lab Exports manufacture the involute gear tooth profile board?
Yes. Lab Exports manufactures the involute gear tooth profile board at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-TOML-11025.
Request a quote
Email [email protected] with the house code EL-TOML-11025 and the quantity, or add the involute gear tooth profile board to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
