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Pinched saw blade tip question.

1.3K views 30 replies 19 participants last post by  Cutntreessmallerpieces  
#1 ·
The nephew was operating my chainsaw and the tip was pinched at full speed. Upon freeing the saw (another comedy filled story there), it would start and run but the chain refused to move. Upon further investigation I noticed 5 guide teeth had snapped off and become trapped in the bar at the tip.

I'm not a wood cutting pro, but I can guess a new bar and a new chain are needed? Or can the bar be salvaged with some elbow grease and gentle prying to free the stuck teeth?
 
#7 ·
I'd have a talk with the nephew.

Very important to instill extreme chainsaw safety early. Boots, chaps, gloves, sleeves, vest, helmet with face shield. Spotter, knowledge to avoid pinching it. How to properly clear a stuck saw. I helped clear a ski slope once and cut my share of firewood. I've seen trees explode, slanted wedge cuts cause the tree to slide and fall backwards (on a truck, not mine thankfully) trunks split, and I'm not even a pro. A guy in our town was cutting overhead, the saw bucked and hit his head. No helment. DRT. :(
 
#8 ·
As already said, Use a flat bladed screwdriver to open the chain track and if the guides have snapped off the chain just replace the chain, but check the Track of the Bar for splits, If it has a split keep it as a backup incase you get another bar stuck.
 
#12 ·
It would depend on bar whether I'd try to fix or not, if its a cheap 14" bar like I keep on my little Echo, I'd just trash the bar, if it was a 36" bar on my Stihl 660 I'd try to fix, my midsize bars would depend on how much wear on bar whether I tried to fix or not, lot of the better bars have a replicable tip, does your bar have replicable tip ?
 
#16 ·
I took it OP meant teeth on bar nose sprocket, after reading again it does sound like he is talking about drivers on chain, that doesn't sound right, unless chain loose enough and drive sprocket worn enough that it was spinning sprocket inside chain, thats only way I can think of to loose 5 drivers, maybe a pic or two so we understand issue correctly.

I'm picturing a cheaper saw with laminated bar if so put new bar and chain on, and probably drive sprocket, at least check drive sprocket and bearing.
 
#17 ·
Bar is junk that’s that but teaching your nephew some life lessons and manning him up are most likely worth the cost. Hopefully he looks back upon these experiences and admires the time and effort you gave him. My daughters first car was an explorer I purchased the car and gave it to her when she first got her license BUT In Order to use she had to pass several tests. Checking all the fluids knowing what are proper levels and types checking all the fuses How to get or give a jumpstart and the start to finish full tire change with zero assistance because I sat on a milk crate 10 feet away and would only give advice and not any other help
 
#19 ·
buy a new bar and chain. also pick up some plastic wedges and learn how to use them to save your bar. they can keep the tree from leaning back on the bar and can be used while bucking if the bar becomes pinched. with that much damage to the saw I suspect he cut through the hinge and the entire tree sat on the bar. if that's the case more training is also needed to improve technique.
 
#20 ·
Pinched bars happen, even to the best of us. Chains get screwed up. Just have to chalk it up to spilled milk.

While it’s a bummer when the bar gets pinched, it’s not the end of the world, especially when the one who got pinched is new. Reading the tension on a log is tough, and lord knows how many I’ve pinched beyond repair. Literally last week I watched a USFS C Faller (the dudes that drop the biggest, gnarliest, most dangerous trees) pinch his bar dropping a small tree. Granted it was a complex operation, but it still happened.

All that to say, don’t give the grandson too much grief over it. Teach him to read the bind of a log, buy a new bar and chain, and rock on.


Image

For posterity sake, here’s a picture of me next to a stump that pinched my bar. That’s a new bar on the saw for specifically that reason.
 
#21 ·
And let him change out the bar and chain. That makes it even more of a learning experience.

As for Cars, in ancient history (early 1950's) getting a car was cutting 100- 200 lawns--since my first car cost $100. Earl Schwab paint job for $ 20 = 20 to 30 more lawns. Reel lawn mower, pushed, no motors. Fifty cents to a dollar depending on lawn and amount of edging etc.
 
#22 ·
Update. Yes it was the sprocket at the tip that got pinched. A screwdriver and multiple light taps freed it up and no cracks seen. A new bar and chain will still be purchased in case of another accident. A big thank you to Offrink for the sage advice about having a spare. I guess "one is none" applies to chainsaw parts as well.

Made the nephew remove and then attempt to put the bar back on. After 30 minutes I pulled up a Youtube video to show him what he doing wrong. Once the brake handle was moved to the proper position the side cover went on correctly. Told him making mistakes happens, and learning how to solve the problem is just as important as that becomes experience.
 
#25 ·
I don't see why new switch is needed unless that was only key.

Bottom line it was. Reason being my late wife visited our TN cabin for a vacation with her sister. I couldn't get the time off. So when she closed the cabin she hid several keys but never bothered to tell me or anyone else where. So the key to my Dakota is MIA along with the cub cadet lawn tractor keys. Having 75 different keys I managed to find one that worked the ignition on the tractor until the nephew happened. If we use a broad bladed screwdriver we can start it but I'd prefer a better solution.
 
#26 ·
I don't see why new switch is needed unless that was only key.

Bottom line it was. Reason being my late wife visited our TN cabin for a vacation with her sister. I couldn't get the time off. So when she closed the cabin she hid several keys but never bothered to tell me or anyone else where. So the key to my Dakota is MIA along with the cub cadet lawn tractor keys. Having 75 different keys I managed to find one that worked the ignition on the tractor until the nephew happened. If we use a broad bladed screwdriver we can start it but I'd prefer a better solution.

not to expensive and shipped to your door.
 
#27 ·
So I'll be purchasing a second new chain in as many days, a new bar, and a new ignition switch since he also snapped the key off in the cub cadet tractor. Things are starting to add up. So much for saving money not hiring a pro.
Kids are expensive :D
SNIP
I was thinking that too, as in;
“I wonder how much a new nephew would cost?” JK
😁
 
#29 · (Edited)
You gotta train them right so they can adapt to any situation or equipment. Patience and operational safety is paramount. I like resurrecting older chainsaws and putting them to work. As in...

Image


I learned on this monstrosity. A 3:1 gear reduction McCulloch from 1958. It is 87cc and only weighs in at 36 pounds. Equipped with 36 inch roller bar and 1/2" full chisel chain. After getting over any fears operating this chainsaw, I found newer models to be very lacking. So far as safety features it is lacking in all of them.

One nice thing about this monster is that is does not make saw dust. So nothing is floating all around in the air getting in my eyes or messing with allergies. This saw just makes large chips.

My Stihl only weighs 12 pounds. It is too easy tossing that thing around after dropping a large tree with the Mac Super 55A. Almost to the point of being dangerous. OK very dangerous. Stay away from me when I am operating a saw.