I purchased a couple of these new windshield wiper motors from ebay. They are not the common Saturn type of motor, but similar. They have only 2 wires, and the negative is isolated from the housing (unlike the Saturn motors). I did not like the Saturn motors because of the chassis gnd. If used as a servo, the chassis would be hot in one direction.
I took some torque and current measurements using a Fluke 337 clamp meter and a 50lbs fishing scale. I made a simple jig to mount the motor solid to the bench, then attached a 12" steel tube arm to the shaft. I then attached my fishing scale exactly 12" away from the center of the shaft and mounted it solid to the bench.
I used a 12V 7.5ah sla battery fully charged to 12.6V. This battery can source 72A for < 10s, so there was plenty of current for my quick tests.
Results:
Stall Current: 45A (voltage drop to around 10V) Stall Torque: 23 ft. lbs.
No load Current: 2A (motor running)
In Rush Current: 8.3A (no load)
All results were very similar in both directions.
Unfortunately, the motors have no markings on them, but they look just like most of the motors that are sold at surplus stores for around $20.00. They have 3 - 6mm mounting bolts and run at around 60rpm no load.
I plan on using these motors for my RC land speed car project. One for the steering, and one for the hydraulic brake. After measuring them it looks like they may be a bit overkill, but it can't hurt. I'll just need to make sure I set up my servo drivers properly (end limits) and have some good mechanical stops to avoid breaking anything!
Terry