How to Diagnose a Bad Power Cord or Switch
This article outlines the basics of power tool and appliance electrical diagnosis. You can use a multimeter to test tool and appliance cords and switches, the two parts usually responsible for electri...
How to Replace the Blades on a Hand-Held Planer
For a planer to do its job, you need to make sure the blades are as sharp as can be. This article will walk you through the steps needed to change your Planer blades so you always get the best perform...
Power Tool Care and Maintenance 101
This article suggests guidelines for power tool care and maintenance. It also describes information tools available at eReplacementParts.com.
The Knife Set D-17217 (731001-4 ) was the High Speed Steel Set and it is no longer available. You can use part number, D-17223. It is a Carbide Tipped Set, or you can use the newer style D-17239. It is a double edged blade set and it includes the set plates.
My Makita N1900B sparks on Carbon Brushes, causing it to rotate so slow & w/o much power. I replaced the 2 carbon brushes w/ new ones but still no good. Carbon brushes & springs are installed properly, so I doubt it's the trouble cause.
Makita used two different blade setups on the N1900B hand held planers. One used a large steel knife similar to what you would see on a stationary jointer. The other setup is the small, disposable, carbide knives that have become the norm on most hand held planers today. Either knife will work fine. The disposable carbide knives do have some advantages in that they are cheap, double sided, easy to change, are self setting and because they are carbide they stay sharp longer.
If you are using the large knife setup you will use the knife setting gauge that came with the planer for setup. The knife setting gauge is part #123010-1. It holds the blade at the proper height while you lock it in place.
With the quick change carbide knives there is a groove in the center of the knife. the knife holder has a tab that sets into the groove and the knife is then locked at the proper height.
I've owned and my staff and I have used this tool planer for five years non stop and this my first call for a part replacement and all that is required is the trigger switch, and that's because I foolishly rested it on a step ladder and the ladder got kicked out which caused the tool to drop to a concrete floor and the switch's safety button fell off the the tool started right up again but wouldn't shut off without removal of the plug so if you want to spend wisely Makita the way. Please work safely.
I was given this planer as payment for a job that I did. It is an outstanding piece of machinery as far as I am concerned. I have used it many times with no major problems. I need a replacement blade only because I loaned it to a neighbor. I figure he must have hit a nail or a piece of metal in the board he was planing. Other than that it it an outstanding planer.