Interference Undercutting
Product Code : EL-TOML-11026
Quick answer: The interference and undercutting board demonstrates two effects in gear meshing. Turned anticlockwise, the mechanism runs smoothly because the tooth is undercut; turned clockwise, the rack tip is resisted by the tooth flank, showing interference. It is used with the involute gear tooth profile board in theory of machines teaching. Lab Exports manufactures it in Delhi for engineering colleges, polytechnics and TVET institutes.
Specifications
| Feature | Detail |
|---|---|
| Demonstration | Gear tooth interference and undercutting |
| Anticlockwise rotation | Smooth working, as the tooth is undercut |
| Clockwise rotation | Interference, as the rack tip is resisted by the tooth flank |
| Companion item | Generation of involute gear tooth profile board |
How the model is used in teaching
Involute action only works outside the base circle. If the tip of a mating tooth, or of the rack, reaches into the part of the flank inside the base circle, the two surfaces meet at the wrong angle and jam; this is interference. When gears are cut by generation, the cutter removes that part of the flank instead, which is undercutting. Undercutting lets the gears run, but it thins the tooth at the root and shortens the length of contact.
The board shows both cases side by side. Turning it one way lets students see the smooth motion that the undercut gives; turning it the other way shows the rack tip catching on the tooth flank. Discussion then moves to the remedies used in practice: more teeth on the pinion, a larger pressure angle, stub teeth or corrected, addendum-modified profiles.
Key features
- Direct visual demonstration of interference against smooth working
- Anticlockwise rotation shows smooth running with an undercut tooth
- Clockwise rotation shows the rack tip resisted by the tooth flank
- Two distinct meshing behaviours on one board for comparison
- Complements the involute gear tooth profile generation board
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the interference and undercutting 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
- Generation of Involute Gear Tooth Profile (EL-TOML-11025)
- Coriolis Component of Acceleration (EL-TOML-11027)
- Vibration Lab Complete 11 Experiment (EL-TOML-11024)
- Slip Creep Measurement Apparatus (EL-TOML-11028)
- Cam Analysis Apparatus (EL-TOML-11023)
- Epicyclic Gear Train Holding Torque Apparatus (EL-TOML-11029)
The full range is in the Theory of Machine Lab section of the Engineering Lab range.
Frequently asked questions
What does the interference and undercutting board show?
Anticlockwise rotation shows smooth working because the tooth is undercut, and clockwise rotation shows interference, as the rack tip is resisted by the tooth flank.
How can interference be avoided in real gears?
By using more teeth on the pinion, a larger pressure angle, stub teeth or corrected tooth profiles, which are standard methods in gear design.
What is the price of the interference and undercutting board?
Prices are not published on the website. Add the interference and undercutting board to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code EL-TOML-11026 and the quantity, to receive a quotation.
Does Lab Exports manufacture the interference and undercutting board?
Yes. Lab Exports manufactures the interference and undercutting board at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code EL-TOML-11026.
Request a quote
Email [email protected] with the house code EL-TOML-11026 and the quantity, or add the interference and undercutting board to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
