Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How often to replace cutting blade?
Document: This blade never did work without the whole machine wobbling out of control. The original cutting blade design is a "slight curve" design. This cutter blade is not and that is the difference.
I have had my Acme juicer for over twenty years and never replaced the cutting blade. My old blade was dull but still shredding food OK. The new blade is super sharp and I am so happy to have found an OEM quality replacement.
Have been using Acme juicer for many, many years and just have to replace the blade now and then. Practically no moisture in the pulp with the new blade and it's easier to clean the juicer.
Bought this to replace the original blade that we had used for 30+ years. With the new blade, the juicer works great just like it did when we first bought it! We should be all set for another 30+ years of daily use!
Needed to replace the blade for my juicer. My juicer is 35+ yrs old!The old blade had seen many fruits and veggies in its time! I just neededto replace. Glad I found it here. Price was very good1  Thanks
I received my new juicer blade in mid April. I juice daily so, I put it to work the next day. I juice the usual things, carrots, beets, apples, greens. Nothing dense or hard. My new blade started to wear down on the outside teeth by the beginning of May. Not quite 3 weeks. I contacted the seller and he agreed to either replace it or refund my money so I returned it and am waiting for a refund. It must have been a lemon.
It's the only thing I have had to replace since I bought the machine over 30 years ago and was very pleased not to have to pay another $400+ for a less superior product
This unit brought my old juicer back to life!! The price was right and it replace my old cutter like it was made for it. wow and I almost bought a new juicer.
It came in a timely fashion and was exactly what I expected, I've had this juicer for over 25 years, obviously you have to replace blades. They sure don't make things to last these days like they used to. I'm really glad they still make the replacement blades!
This blade is sharp and just the right size. Couldn't find one locally, so we were forced to buy online.
Answer: Depends on use and what you are juicing and that it is adjusted according to directions so the blade does not contact the hopper tunnel. Original blade lasted for 20+ years of on and off use.