Need a needle clamp for JCPenney sewing machine 6923 -- Cant find any parts :(

try looking at sewing parts online.com They may have your part.

try these 2 sites,, ask them by calling them or email them
about the needle clamp screw
sewvacdoctor.com
a1sewingmachines.com

I looked for a manual for the machine, but I can't find one
I suggest that you go to these sites below & email them & ask them
about a manual for the machine
http://sewvacdoctor.com/

http://www.a1sewingmachine.com/

have you checked to see if the needle is inserted correctly into
the needle clamp,,all the way up into the needle clamp
& that the needle is turned the right way
also check to make sure the bobbin is inserted correctly into the
bobbin case.
if you have checked for this then the following is possible
it's very possible that when you broke the needle that it caused
the machine to jump time, & it would have to be taken to a sewing
machine shop to be retimed.

try changing the needle
rethread the top thread-- Correct needle insertion is mandatory for proper use of your sewing machine.
Raise the needle bar to the highest point, then loosen the needle clamp screw to remove the old needle.
Place the new needle in the needle clamp with the flat side of the needle facing the back, (round needle, the groove in the needle should face away from the shaft).
Push the needle all the way up as far as it will go. Then tighten the needle clamp screw.
also check the bobbin to make sure that it's threaded correctly
& inserted correctly into the bobbin case

it souds like the needle clamp needs to be checked, to see why
the needles are jammed in the needle clamp. it may need to be
replaced, a sewing machine shop can tell you for sure what's wrong

Upper thread breaks
1.needle may be in backwards
Correct needle insertion
Correct needle insertion is mandatory for proper use of sewing machine.
Raise the needle bar to the highest point, then loosen the clamp screw to remove the old needle, place the new needle in the clamp with the flat side to the back of the machine or if using a round needle--the groove in the needle should face away from the shaft.
Push the needle all the way up to the stop or as far as it will go, then tighten the needle clamp screw
2.upper tension may be to tight--try 3 to 5
3.the needle may be bent or damaged--try rolling the needle on a flat surface to see if it's bent or not
4.thread may be hanging up in bobbin case--check area for loose threads or lint
???
Lower thread breaks
The most probable cause of lower thread breaking is improperly wound bobbin
1.always start with a empty bobbin
Never wind one color over the other
2.choose thread that is identical in color & type as the one to be used for upper threading
3.wind the bobbin evenly across & in layers
4.don't wind the bobbin so full that it would be tight & hard to insert into bobbin case
5.bent bobbin--replace
6.lint built up in the bobbin case--frequent cleanings will eliminate this problem, the more often you use the sewing machine the more often it needs to be cleaned
7.thread catching on the bobbin spring or latch on bobbin case, check to see that the bobbin is inserted completely & correctly, & that you are using the right kind of bobbin .

correct needle insertion is mandatory for the proper use of the sewing machine. Raise the needle bar to the highest position, then loosen the clamp screw to remove the old needle. place the new needle in the clamp with the flat side of the needle facing the back of the machine. or if your using a round needle the groove in the needle should face away from the shaft.push the needle all the way up to thestop or as far as it will go & then tighten the screw

also if the thread comes off the thread take up lever it will cause the machine to jam up-i've had that happen more times than I can count

also clean under the needle plate for lint

have you checked the needle to make sure it's in correctly--flat side of needle goes to the back of the machine

correct needle insertion is mandatory for the proper use in your sewing machine. Raise the needle bar to the highest point, then loosen the needle clamp screw to remove the old needle.
place the new needle in the needle clamp with the flat side of the needle facing the back (or if using a round needle the groove in the needle should be facing away from the shaft.
push the needle all the way up to the stop, or as far as it will go, then tighten the needle clamp screw.

how to decide which needle is correct to sew with, it depends on the fabric & thread being used for the project.
like for example, I've been sewing for over 30 years, I'm sewing a stretchy fabric & regular needles won't work because they skip stitches & will pull the fabric thus damaging the fabric, the needle I have to use is a singer universal ball point needles, & I have no problem with the stitches they come out fine.

you need a new needle clamp screw & probably new needle clamp

here are 2 websites to get parts

sewingpartsonline.com

sewingmachineparts.net