Dewalt 621 fine height adjuster

No, you should not have to.

http://www.ereplacementparts.com/dewalt-dw744x-type-table-saw-parts-c-1009_2657_3818.html

Beawared there are much parts obsolete and maybe not available anymore , look before selling the total condition of the table before selling .

There are two types with the same model number, as seen here.
Choose the catalog number of yours on the left, you''ll be taken to a page with exploded parts and in top left choose instruction manual. Or click here.

I hope this information allows you to resolve this issue. If you need further assistance, please post back with a comment to this thread.
If I've managed to answer your question or solve a problem, please take just a moment to rate this post....thanks!

There is a wheel on the left hand side. Typically, it won't let you LOWER it below what that wheel is set to, but that may have something to do with it.

hi i have a coleman powermate 18 volt cordless drill
i put the batt in the charger for a long period of time
and still not up to par
i wonder is it the batt or the charger??
thanks
dan

OK you need to go to Dewaltservicenet.com and in the middle of the page at the bottom type in your model number it will take you to another page and then find your type number and click on the instruction manual section on the right side, I clicked on type 2. This manual is about 30 pages long. Let me know if you still need help and if I have helped could you please rate the answer accordingly. Good luck

You didn't state the model number. The older Craftsmen routers had a red lever lock on the top of the router, one position allows the spindle to turn, the other position locks the spindle. Here's the instruction for the older style routers:

1. Unplug the tool.
2. To lock the spindle press the red button in and slide it to the locked position.
3. Unlock the height adjustment knob.
4. Raise the router motor using the height adjustment collar until you can get a wrench onto the collet nut.
5. Loosen the nut until it turns freely.
6. The bit may still be locked in the spindle, tap it gently (not on the blade!).
7. The bit will come loose in the spindle and can be removed.
8. Replace the bit, tighten the nut snug but don't use excessive force.
9. Unlock the spindle, returning the red lever/button to the free position.
10. Adjust the height of the bit as you wish, then lock down the motor using the locking knob.

What I would do is clean area with air (wear safety glasses) then I use a spray type of dry lubricant on the threads and also the plates that the motor slides on. You can also use WD-40 in a pinch. Hope this helps

some saws have an adjustment screw to tighten locks

Look for a button that will lock the collet in place. This will allow you to adjust the collet with a single wrench, without having to wrestle with several wrenches.