DIY Reciprocating Cycle Linear Actuator 12V 15rpm Big Torque Stroke 12mm 16mm 20mm Adjustable for DIY Design Shale Shaker

Very rugged and durable but I screwed up and ordered the wrong one I got the 15 RPM and I should have got the 150 RPM this was intended to use for a DIY dirt classifier for gold prospecting!

This linear actuator and dc motor is exactly what I was looking for. Perfect for my project. Anybody know the size of the bearing? I want to replace it with a plastic one to make it quieter. RJMP-01-08 fit the shaft but OD was to wide.

The actuator works perfectly, and can be adjusted in speed using a DC Motor Speed Control Potentiometer. But note that the chart in the description images is misleading: suggesting a wide range of speeds in RPM. The motor only operates at 15 RPM with max 12 V. I measured my linear actuator and it is actually running at 30 RPM, so a 2 second period of fore-aft vibration. A Potentiometer can slow that down, but you won't get the hundreds of RPMs suggested in the table. I am not sure why they even include that whole misleading info in the description currently.

This rotation to translation mechanism was used to calibrate the acceleration vs. the voltage output of an accelerometer.This particular unit runs at a low rpm speed using a geared motor.Ashtonishly, the mechanism is well built and the offset circular to linear linkage offers three different radius positions which allows three different linear displacements. We purchased (separately) a 550 rpm motor that fit the apparatus to allow for a faster rpm.You and your students will enjoy using this mechanism. The physics behind the relationship between rotation angle and translation is fastenating.

Very low torque

Soon as we put a 1lb load on the motor it blew the motor and burn up my voltage controller

This product does precisely what it claims to and does it well. I’ve been using it 24/7 for about a week now and doesn’t show any signs of stopping. With a 12v 2a power supply driving it, the motor stays cool to the touch even under load. I will say, it can be quite noisy under load so you definitely don’t want this operating in a noise-sensitive area.All in all, it does an excellent job and is built rock-solid!

The linear bearings used in this are impressively low quality, and they have the most play I've ever seen in a bearing. That said, the actuator does do its job and moves back and forth repeatedly. You'll want to add additional linear constraints if those are important for your application. I stopped using this after 4 days because the play in the linear bearings became too significant for my jig, so I don't have a good sense of overall lifetime.