This might help
My 5 lb LEM on the left.
Pros
Great for batches of 5-10 pounds
Easy to crank
easy to clean
stuffs with ease larger casings and small 13mm with a 3/8" OD tube.
small amount of meat at the end of stuffing.
enclosed metal gears
Cons
You can only fill the canister with 4 3/4 lbs meat mix
you have to back the crank back 1/4 turn when stuffing smaller lengths. The piston pressure will keep stuffing.
My 25lb LEM
Pros
motorized with a foot pedal
motor can detach and you can use the crank
great for large batches
has an upper and lower limit switch so you dont get a gear strip.
stuffs larger tube sizes.
adjustable speed
down and up buttons
Cons
heavy
hard to stuff small size with smaller tubes.
Leaves about 1/2 lb meat in the bottom of canister (lower limit stop)
very cold meat can break the plunger with smaller tube stuffing (the middle part of plunger)
expensive
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