WATCH THE NEW VERSION BELOW:
• Understanding Gear Tra...
Since this video was so popular I have produced a NEW version in 2023 called 'Understanding Gear Trains for Engineer's Lathes', with better graphics and production.
This video explains how to calculate gear ratios in the gear train of a small engineers' lathe and includes the thread cutting and power feed gearbox that drives the lead screw. Certain gears in the gear train, known as 'change gears' can be switched to produce different lead screw speeds.
This video includes the use of a compound gear for converting a lathe with an English Imperial lead screw (eg 8 threads per inch) to metric, and also shows how to calculate power feed rates for the cross slide and longitudinal movement of the carriage. It is all explained using sketches on a whiteboard and basic arithmetic.
To cut metric threads with an imperial lathe you need a compound gear described here. The standard compound gear has a 127 tooth gear connected to a 100 tooth gear and this gives the most accurate metric conversion (127/100 x 2=2.54 cm/inch), but there are alternative combinations with small errors including 80 to 63 teeth, 47 to 37, and 56 to 44 teeth.
I have devised a simple method for calculating the threads and feeds using the gearbox and change gears. This is described in the comments attached to the video. Check it out!
If you need to calculate the gears required to cut a particular thread, try my free online computer program, but this video will give you a better understanding of how these calculations are done.
The online program:
RideTheGearTrain.com
• Mini Lathes-Tutorial-1...
• Tutorial 1B for users ...
• Tutorial for RideTheGe...
Playlist:
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SOME LINKS
See the Playlist for engineers lathe.
• Introduction to "How t...
/ evan-e-cent
• Stainless Steel Wine B...
• Understanding the scre...
• History of the screw c...
• Understanding the Poly...
• Metric Imperial Conver...
• Understanding Gear Tra...
• Soft Jaw Self Centerin...
• Tangye Engine #1
• Grinding & Milling Att...
• Spindle Clamp -If you ...
• Making an ER32 collet ...
• Need a T-Nut for your ...
• Decorative Bolts for S...
• Demonstration of Atmos...
• Animations of Beam Eng...
• Stamper batteries used...
• Tutorial for RideTheGe...
• Tutorial 1B for users ...
• Mini Lathes-Tutorial-1...
• Making a hexagonal die...
• How to produce cams on...
• Cutting Keyways on a l...
• Designing a cam for a ...
• A cheap surface plate ...
• How to turn a metric t...
• How to use a ball turn...
• Make a ball turning at...
• Restoration of old gol...
• Art in Stainless Steel
• Restoring an electric ...
• A Small bronze bell pr...
• Machining a Modificati...
• Assembling the lathe h...
• Motor Speed Control El...
• Super T Link Belt to d...
• Motor Replacement Boxf...
• Indexing to mark punch...
• Milling a slot with th...
• Pressure Mounting disc...
• Milling a curve using ...
• Chuck offset posts wit...
• Mount thin discs with ...
• Stamper Batteries-How ...
• Stamper Batteries Abri...
• Pouring white metal Ba...
• A left-hand internal a...
• A left-hand internal a...
• Living with backlash i...
• Backlash- A simple top...
• A flaring tool to use ...
• Chuck dismantling & as...
• Quick change tool pos...
• Annealing copper discs...
• Hero's steam engine li...
• Make a rear mounted cu...
• Milling attachment for...
• Making a lathe indexin...
• Turning a taper by the...
• History of Steam Engin...
• Four Jaw Chuck and Dia...
• Steam Indicator Use an...
• How to wire a reversin...
• Lathe head reassembly ...
• Overhaul of the lathe ...
29 ноя 2019
