Spur Gear Design 3 - Construct, Edit and Animate

How to design and make a working spur gear, calculate the involute of the circle and animate. This video shows how to manipulate the template gear using equations.

This video follows on from parts 1 & 2 which details how gears of different diameters interact or mesh, identifies which characteristic control the gear ratio and why the module is important. The relationship between addendum and dedendum in terms of clearance is also discussed. Video 2 details how the involute of a circle is calculated. characteristics of gear design including the top land, face, flank, bottom land, gear tooth profile, pitch circle, circular pitch, dedendum, addendum, whole depth, addendum circle, clearance circle, root circle, base circle, pressure angle, line of action and angle of interaction are all discussed in this series..

[songotenks]

Thank you for this tutorial, it was well planed out and straightforward. I liked it particularly because it helped me join the concept of making an involute for a circle and then using it to design the gear teeth. I will definitely recommend this vid to my friends and comeback latter to watch it again.

[laynemccormic]

Thank you for this, best vid on youtube for spur gear design in solidworks

[TheCzaach]

Great series Sir! I'm an electrical engineer and occasionally need some knowledge of other fields and this one is brilliant and gives a lot of insight even to a beginner.

[scotts]

Really enjoyed your presentation. I had a lot of problems with the gear losing definition as I trimmed the reference geometry starting at 15:59. I solved this by converting some of the template geometry and then only extruding the gear teeth. Tried it with multiple equations and seem to work fine..

[iforgotmyname]

Thank you sir very much for this short and straight forward explanation series of gears! Very interesting and comprehensible!

[tomsko]

Thank you for the demonstration, especially parts 1 and 2 with the detailed calculations.
25:16 - It's been some time since I made gears so I'm a little rusty here. I don't understand why there so much backlash between the two gears here. In fact, if the piech diameter circles are tangent to each other, there should be constant clashing between the two gears. They should be touching at all times, on both sides of the closest two teeth. In design, I have to add backlash by either separating the two centers of circles or putting an offset on the gear profiles in order to actually allow them to mesh properly.
It might be because of the coarse design of the involute, but I don't think it would account for such gaps.

[ironscavenger]

At 13:35 you add a construction line to mirror the involute.
How exactly is this line defined?
I get that the other construction line is placed at half the circular pitch. But how exactly do you define where to mirror the involute?
At least it looks like you just place this mirror-line anywhere freely on the pitch circle.

[nagarajacharya]

Very helpful... And nice way of explaining 🙏

[createch]

Hey good content man, if you see at 5:40 the formula of Addendum circle as u mentioned is {Pitch circle + (Module * 2)} As per your values this should be 64mm, but u have 104mm, is it right? or am I wrong, can you clarify that part?

[timothysands]

This tutorial was life changing for me as an Engineering student. Thank you for this! Do you have a video on Internal tooth gears as well?

[jozsefsalagvardi]

Thanks for your work. But I dont understand why do you replace the evoluta (curve) what was made at 11:27 with an approximate circle of 2 points plus one point of tangent the the evoluta at 14:47/15:45.
The profile of gear(s) in this case will not be a correct evoluta maybe like an evoluta only.
I used to work with SolidWorks program in between 2008 and 2011 but could not find this method. Although I made evolute curves for plastic gears with Solid Edge program as step by step rolled down the staight on the base circle in two degree increments. As you did this in 3 steps.

[joem]

at 5:48 on the video as you click the OK box the base circle dimension can be seen changing as the formula applies. When examining the dimensions in the evaluate to column the only dimension that is correct is the pitch circle, the other 4 are incorrect. Advance to 5:55 in the video your sketch dimensions are all correct. Is that caused by Solidworks being slow at math or was it problems with the formulas and was edited out. That page you inserted the formula's on led to much confusion.

[nicoleevangelista]

my mirrored involute curve does not pass through the reference point on the pitch circle, causing an issue making the gear tooth. Advice on how to fix this?

[dylanslocombe]

great video. but why does there appear to be so much backlash in the gear mesh? is there a more idealized way to space out the gear teeth to eliminate this or is that gap necessary in some way?

[JohnFuller]

When you're drawing the actual involute, what tool are you using? Arc tool? Line tool? If it is an arc tool, how do you make it go through all the point?

[พ่อเป้ชาแนล]

Thank you, How to draw if drawing have addendum modify ?

[manojmurali]

Can you explain what is module in detail. How is it useful while manufacturing.

[ahmedawwad]

it's the best video for designing the spur gear but how can I turn it to a helical gear

[UA-mknh]

Hi Sir thanks for this video!
I want to how to control backlash and is it possible to achieve zero backlash or approches to zero backlash?

[andriesrinsma]

It seems that the teeth of the two gears have a lot of play. Is there a way to optimize the width of the teeth?