Small water pump

Small (1.5gpm/5.7Lpm) water pump designed to be powered by a Johnson 550-size motor. Note: impeller in second pic is not the final design.

Maker/DIY

Creative Commons Attribution Share Alike

Commercial use is allowed, you must attribute the creator, you may remix this work and the remixed work should be made available under this license.

Learn more or download attribution tags

Description

This small pump was designed for use in RC combat model warships, but I am also using it in an automated garden watering system, and I expect there are many other uses for a small pump.  I used stainless steel hardware, it's not that much more expensive, and is in line with its design purpose of getting submerged in fresh water regularly.   The pump itself will work fine in salt water, but the motor will short out due to Na and Cl ions in the water.
   Some fettling may be needed around the rim of the impeller for it to fit into the pump;  this is a WIP and I am tweaking the impeller size in the future so that it fits well with minimal fettling.  Additionally, the recess for the brass collar in the impeller should be cleaned up with a drill bit prior to using an ABS/acetone slurry to weld the collar to the impeller.  Strongly recommend putting the collar in without the set screw, then drilling (I use a drill bit held in my hand, not a power drill) in from the side to access the set screw hole.  
The brass tube should be inserted into the discharge hole and secured there with either slurry or CA glue.

Materials and methods

2 M3x8mm hex-head screws
4 M3x30mm hex-head screws
4 M3 nuts
1 550-size brushed motor with 3.17mm shaft
1 Dubro 1/8" (3.17mm) brass collar
7 or 8mm O.D. brass tube for outlet.

Documents

Issues

Issues are used to track todos, bugs or requests. To get started, you could create an issue.

Comments

08db9d1502275a2a07b17a9a128f92a2?default=blank&size=40André Uhlmann added this to the nützlich collection ago
24278e690764bc4be8ee7c9493ae58c6?default=blank&size=4012keenerc added this to the flowrider collection ago
Mini  sushi chops trans more centeredSushi Desires added this to the Mechanisms collection ago
Mini  sushi chops trans more centeredSushi Desires added this to the Tools collection ago
Mini  sushi chops trans more centeredSushi Desires added this to the Gears, Threads, Bearings, Pulleys, & Other Interfaces collection ago
19f22ab7af72f7d223a7e49304690666?default=blank&size=40Hardwarejunkie added this to the Useful Parts collection ago
47cdd4a2db89b05356db897f04b3830c?default=blank&size=40gusman added this to the utilitarian collection ago
Mini photo 17042015 230106TheKitMurkit added this to the To do collection ago
Mini monimweb1Alain Ducros added this to the petite pompe collection ago
B04581118910da4e8316ecb47b719614?default=blank&size=40imaiorov added this to the new collection ago
190031a82480947cfb5bfa829d2a38c6?default=blank&size=40Timothy Renner added this to the Household collection ago
Mini scharnievonTugboat published this design ago