DIY tracking parabolic trough solar heater. Having bought and used several of these over the last five years, I had one that needed repair or replacement. It was not turning well and smoke was coming from the motor. So yesterday I did a bit of work to see what had failed and whether it could be repaired.
This Dayton 2L008 from Grainger priced at US$58.30 has worked well here for five years in my own solar collector. Probably it has operated for several hundred hours in all sorts of temperature and humidity conditions.
It is not essential to use this particular gearmotor. There are all sorts of gearmotors. I wrote about alternative sources here.
Granger has branches and representatives worldwide. Here in Canada, Grainger is represented by Acklands-Grainger. I called them yesterday to check price and availability and was told that I could have one tomorrow but the price was C$97.92! Wow! I thought the C$ and the US$ are about the same? I ordered one and I will argue with them about their rip-off Canadian pricing tomorrow when I pick it up. I need to have a spare new one. Then I turned back to looking at the one that had failed.
Given the relatively high cost of the Dayton 2L008 gearmotor, it is comforting to know that it is sturdily built and gives good service in the DIY Tracking Parabolic Trough Solar Heater. Even better to know that it can be repaired if necessary.
An update: Acklands-Grainger gave me a "break" on the price of the Dayton 2L008 I bought today - C$82.04. Still pretty high I think. The best thing, if you are buying one of these in Canada, or anywhere non-US, is to take in a copy of the Grainger webpage for 2L008 showing the US price or make it clear on the phone that you know the US price. Put them on the spot.
Another update 2L008 is part of a series of 12 volt gearmotors from Dayton with varying gear ratios and RPMs. In case the information in the post is useful to others using one of the the series, I have listed them here for the search robots: 2L003, 2L004, 2L005, 2L006, 2L007, 2L009, 2L010, 2L011. Page 110 of Grainger Catalog 402 about this series is here.