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In the top left of the picture there are 2 canisters, one of which has a bleed screw at the bottom. Those are filters for diesel fuel and the bleed screw is to expel water. From the top right of the filters, a rubber hose leads to the right and down slightly to the injection pump. On top of...

If you mix iron (steel?) and carbon(diamond) at high enough temperature, the carbon will dissolve into the iron, making it have a slightly higher carbon content. That's how carbon steels are made. You don't want to do that to your diamond wheel. Either run them at low speed and/or with...

You haven't said what the gears are for which might help us guide you into how to make the best use. If the gears are for a lathe to cut threads, that is different from gears to fit into a gearbox to use on a power mower.

In the Arduino IDE, click on tools and then "manage libraries". When that is finished loading, use the search bar at the top right and search for "Keypad". There will be many that show up then. Scroll down until you get to "Keypad" and install that. It should clear up that error message.

Why don't you tell us a little more about the program and the problem you are having with it. How is it programmed? Is the program secret or can you share it here?

I don't have that printer so this might be way off the wall. I changed my mini-mill to CNC and found that sometimes it would skip a step. As far as I could tell, the driver chip was overheating and shutting down for a fraction of a second. My solution was to increase the voltage and decrease...

I apologize, you are right. I had only looked at the first part where is didn't mention that the 29.5 was between centers and hadn't gone down into the rest of the ad where the specs do mention that.

You have to be really careful with cheap lathe specifications. The Vevor lathe shows a bed lenght of 29.5" but doesn't say that is between centers. My 7X14 lathe has a bed length of 19.5" but the tailstock takes up part of that to hold the center.

This might not answer your question but this is a question asked by a member on "The Hobby Machinist" back in 2014...

My opinion is that you start to save money now to buy a more expensive lathe. I feel that neither of those lathes are really suitable for what you want to do. Of the 2 the Vevor is the best but some of the information is suspicious. Most often lathe sizes are specified as swing over bed (the...

No, they are completely different sizes.

The mills make the smoothest cuts when they are used in climb milling. My mill has about 3 thousands of backlash. If the cutter I am using requires a one thousandth of an inch per revolution and I try climb milling, at some point the cutter will pull the work toward it that 3 thousandths of an...

I like it when the photographer puts some kind of measuring device in the picture so I can see the scale of the object. Photographed in the right circumstances a full size engine and a minature look the same.

Consider using a labyrinth seal for the center seal. Those do not require the crank to be pressed apart because they don't wear out.

Snowmobiles have used inline twin or even triples of 2 stroke engines with a single crankshaft. I think they avoided a V-engine for space concerns rather than technical problems.

Stepper motors for your milling machine are specified by size (NEMA17, NEMA23, etc.) which specifies the mounting hole spacing and their holding torque. Most often you see the steps per revolution (most often 200). They may have 4 wires or 6. Lots for you to learn about. When I decided to...

Having the valves in the block requires more space and limits the compression ratio. By moving them to the head directly above the piston you also have less exposed metal that is robbing the engine of heat. The higher the compression and the higher the temperature the engine can run at, the...

I have a Century AC/DC welder. The day after I got it, I switched it to DC and have never switched it back. A few years ago I was intrigued by the cheap inverter welders, DC only, 200 amp max. The Century welder has not been switched on since. The inverter welder is so light weight that I...

My 3D prints are a bit more basic but using CAD you need to create the 'drawing" and then from there create a "mesh" that lets you save the drawing as an .stl file which your slicer can then take and create gcode from. I've been doing my drawing with FreeCAD and it was a chore to find out how...

Gosh, it's too bad that tachometers are so expensive so you can't get one to test if the speed only changes in increments of 100...