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Topic: 2580 worm gear
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Paul Repar
Junior
Posts: 14
From: Chicago,Illinois
Registered: Apr 2006
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posted September 12, 2019 01:31 PM
In response to all the claims of Bell&Howell and their original worm gears are ideas and opinions,their same lubrication was being used all inside their machines,the aluminum hub with the nylon over it known as the worm gear in my opinion cracked because of heat buildup causing the aluminum to expand and contract,which aluminum does in general when heated.But it could also been the constant use in the school systems as well,just an opinion,in response to Dave,Urbanski Film first original design was Derlin over an aluminum hub,nothing wrong with them,replaced about 25 machines using that particular worm gear,he has now since switched to aircraft aluminium,which is great,will never have an issue again.I have currently replaced about 40 of the new aluminum worm gears,and with the proper adjustments the machine runs super quiet.As far as that spring foes,Sam is right,seems to be a guard spring for a sprocket,if it came out of the lamphouse not sure why it would be there.Any help needed you can watch my worm gear tutorial on a 1500 series via this link.
https://www.youtube.com/watch?v=sVCs17tXDNs&t=7s
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Paul Repar
Junior
Posts: 14
From: Chicago,Illinois
Registered: Apr 2006
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posted September 13, 2019 04:48 PM
Jim,The reason for the film just "sliding"thru the gate means the 3 claw protrusion needs to be adjusted.There is a small set screw which is located on the "in and out bracket"where the shuttle arms go thru and the 3 claw is attached to.If you aligned the shuttle arms with the claw on the downstroke,where the center tooth of the 3 claw is aligned to the center of the gate opening,you will need to turn that set screw slightly counter clockwise so that the claw protrudes a little more thru the slot,after you do this,and you will have to take the chassis out to do this,get a scrap piece of countdown leader thread it up like your running a film,close the lens carrier,and proceed to turn the belt pulley wheel while looking thru the lens carrier without the lens inserted.You will look and see if the countdown frames are aligned,and you also may have to adjust the framer knob as well.if you here any clicking that will be the look restorer tripping causing the film to want to pull perforations,means you will have to do more adjustments,if the look restore does not trip,then you are well on your way to have the timing set.Hope this helps!
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