New Ryobi 3-speed drill transmissions!

[Bill_Hancoc]

Looks good except one thing. Its a hammer drill. From my knowledge and use of hammer drills they are different from regular drills, when they get up to their stall torque instead of just stopping they have a hammer action that bangs the drill forward to help commonly through concrete and/or cement.

Do you have the ratios as oppposed to just the speed with a ryobi motor attached?

[Teched3]

Hi Art,

Found a link that will take you to a web site that has a part listing for the Ryobi P220 drill. It appears to me that Ryobi only offers the drill motor/transmission assembly as a repair part. That will likely be fairly expensive, and you can't use the motor. I guess you might want to get a price, and disassemble to see how it is built. Dewalt's are pretty cheap compared to most planetary gear transmissions I have seen. I do like the apparent gear ratios available with the Ryobi. Ryobi's 3 seem more useful then the Dewalt's 3.

[Teched3]

Hi Art,

Found a Forum on Ryobi, and users are not happy with the the Ryobi. Uses bushings instead of ball bearings. It seems to be built similar to the Boesch trannys we used a few years ago. Found the price on the drill motor/tranny assembly as well. $92.66 is steep compared to Dewalt's needle/ball bearing output shaft. I would keep looking, but the Dewalt's will be hard to beat.

Link to forum: http://209.235.218.9/dc/dcboard.php?...g_id=806&page=

[Tristan Lall]

Originally Posted by Bill_Hancoc

Looks good except one thing. Its a hammer drill. From my knowledge and use of hammer drills they are different from regular drills, when they get up to their stall torque instead of just stopping they have a hammer action that bangs the drill forward to help commonly through concrete and/or cement.

There should be a switch to lock out the hammer mechanism. Additionally, if you're going to the trouble of disassembling it, it should be simple to remove the offending parts entirely.

Originally Posted by Teched3

I do like the apparent gear ratios available with the Ryobi. Ryobi's 3 seem more useful then the Dewalt's 3.

I noticed this as well; we found that the DeWalt XRP's 3^rd gear was hardly used, since 2^nd is so close, and since the XRP's shifter has a long travel.

Originally Posted by Teched3

Uses bushings instead of ball bearings.

I was wondering about this—the DeWalt's bearings (needle and ball) are a nice (but expensive) touch.

[artdutra04]

Originally Posted by Teched3

Hi Art,

Found a Forum on Ryobi, and users are not happy with the the Ryobi. Uses bushings instead of ball bearings.

Thanks for the link. That's interesting that there isn't any ball bearing in it. Last night my father and I were taking apart an older 12v Ryobi cordless drill to take a look at the transmission inside, and we found out the hard way that there is ball bearings in the 12v (non-hammer) model. Then again, the drill we took apart was almost ten years old, which may have explained the better quality.

I love the Dewalts, and I know that they are of a way better quality than the Ryobis. I just found this drill, and thought I would post it here because there may be some applications (non drive-train) where you could use a cheaper transmission. I was just looking around for a cheap source of a second transmission identical to the one we now have when I found this. Once we get a second one, I'd like to try using them on a Vex robot drivetrain. When that Vex robot hits 8.8 feet/sec, you'll see some serious stuff!