I can't put in a new blade in my Dewalt jig saw DW 993. It has a turn knob which will not open or close the saw slot. How many times must I turn the knob to open or close and do I have to lpull it out to turn?

Most Dewalt manuals are available here: https://servicenet.dewalt.com/Home . There are 40 Dewalt power tools with 321 in the model number. Several are jigsaws. There are two types for the DW321 (TO3PAK-2LE JIG SAW) jigsaw. Please look at the label on the jigsaw to ensure that you get the correct model and type. The direct link to the manual for the DW321 Type 1 is currently https://servicenet.dewalt.com/Products/GetDocument?docName=402086-01,DW321.pdf&productId=2841&productType=3001&documentId=24909&translatedFileName=http://documents.dewalt.com/documents/English/Instruction%20Manual/402086-01,DW321.pdf .

To change the regular blade on the DW321 type 1, unplug the power tool. To remove the blade, pull the knob on the top of the jigsaw up about 1/4". Rotate the knob counterclockwise until the clamp opens. Do not force the knob after it stops. Insert the blade making sure that the back edge of the blade fits into the support roller. Rotate the knob clockwise until it clicks and then push it down.

I hope this helps.

Cindy Wells

At the front, above the blade, is a finger slot. Insert finger and pull forward. Blade will be released. Insert new T blade and release finger.

Please check out the instructions on ehow.com this should help you.

http://www.ehow.com/how_4912250_change-dewalt-jigsaw-blade.html

Dewalt Jig Saw

DeWalt Jig Saw MANUAL ManualsOnline com


Blade catch wears out too fast
I loved this tool when it was working but after not that much use the teeth that hold the blade under pressure no longer hold hard enough to prevent the blade from coming out. The mechanism that holds the blade has no catch hole, it uses a few serated teeth to pressure hold the blade in place. Unfortunately, once the pressure starts to lessen you can't tighten it down...

http://servicenet.dewalt.com/Parts/Search?searchedNumber=Dewalt+DC330K&searchType=1#

Detail 201 spindle assy , [114 no longer available ] part 118 this parts in priority but 114 is to important to have only the possibility to have only a new spindle assy working in an old part together is not to garantee for a long life.

1. Lift the black handle/knob approximately ¼”.
2. Turn the handle/knob counterclockwise 5-7 full turns until blade chuck is completely open, keep the black knob pulled up as you turn it.
3. Insert “T” shank or universal jigsaw blades into the chuck making certain that the back edge of the blade fits into the support roller. Please note that when using “T” shank blades, insert the blade to the shoulder of the shank.
4. With the knob/handle still in the up position, turn the handle/knob clockwise until the knob starts to ratchet.
5. Push the handle/knob down. The blade is completely installed at this point.

there should be a botton or thumb press undernith up frount unplug and depress and blade will come out

I have used the same tool. Make sure that the blade release/ hold tab is engaged. Maybe the return spring is fouled or stuck. Try some lubricant.

There is a lever on the handle, you have to pull it up and rotate it counter clockwise about 3 times (shouldn't take any more than that. The blade will be loose now,put in the new blade and turn the back lever clockwise until it clicks. The blade should be tight,push the lever down and move it into the slot in the handle.

I hope this helps