Despite the larger diameter, this blade works fine on our older Jack LaLanne "Power Juicer". It seems to actually produce more juice than our older, dull blade. Two things to note when switching from the old (legacy) blade, which is significantly smaller in size from the new blade: 1. Be sure to use the original longer screws that are used with the old blade. The screws that come with the new blade are shorter. 2. Be sure to remove the plastic film that comes on the new blade. We thought the blade was painted white, but after the first juicing we discovered that the blade was actually covered with a white film that should be removed prior to use. We are satisfied with this purchase.