Model and function comparison
bernette b62 vs b64 vs b68: choose the finishing stitch
Model and function comparison
The bernette b62, b64 and b68 share the b60 AIRLOCK name but do different finishing jobs. Start with the stitch action you need instead of assuming that a higher model number simply adds options to an ordinary sewing machine.
Pick the machine by what happens to the fabric edge
b62 AIRLOCK: coverstitch and chainstitch. Choose the b62 when the fabric edge is already cut or folded and you want a stretch hem or topstitch without trimming it. The machine has four coverstitch formations and three chainstitches. Its chainstitch can be undone by pulling the looper thread, which makes it useful for basting but different from a locked straight stitch. It is not an overlocker and does not create the b64's serged raw edge.
b64 AIRLOCK: overlock only. Choose the b64 when you need a serger to trim and wrap the raw edge while sewing. It adds the separate overlock function, knife and 16 listed overlock formations, but it is not the b62's coverstitch model. A conventional sewing machine remains useful for ordinary construction seams and buttonholes. The b64 manual has some generic coverstitch wording whose exact application is unresolved; the b64's U.S. model page and the b60 comparison distinguish it from the coverstitch b62 and combo b68.
b68 AIRLOCK: overlock and coverstitch combination. The b68 is the family option for users who want both edge-serging and coverstitch work in one machine. The official comparison lists 31 pattern formations, including overlock, coverstitch and chainstitch choices. Those are different operating configurations, not one setting that simultaneously performs every job. Check the exact standard AIRLOCK or Maker edition package: the Maker page lists additional guides, specialty feet and other accessories not shown as the standard package.
How the choice changes the routine
All three pages document looper air threading, a free arm, a foot-control sewing setup, five LEDs, a knee lifter and a supplied slide-on table. Those shared conveniences do not erase the main function difference. The b62's automatic air threader is for its chain looper; its needle threads are still threaded by hand. For any model, expect to follow the stitch chart, choose the correct needle and thread paths, sew a test on the actual fabric and secure the finished stitch ends appropriately. Coverstitch and chainstitch are looper formations, so removal and end securing are not identical to ordinary lockstitch seams.
The b62 and b68 list coverstitch widths of 2.8 and 5.6 mm. The b64 instead lists a 3–7 mm overlock stitch-width range; that is a different measurement and should not be compared as if it described a cover hem. For larger fabric pieces, the included slide-on table is useful; for cuffs and other tubes, the free arm can be preferable. If changing stitch systems is frequent, decide whether a combo's added capability is worth the extra reconfiguration. If one function dominates, a specialist may be the clearer match.
A short decision test
- Need hems on knit garments with no raw-edge trimming? Begin with the b62.
- Need to trim, join and wrap an edge in one serger pass? Begin with the b64.
- Need both operations from one machine and can change its setup? Compare the b68 standard and Maker boxes.
- Need standard seams, buttonholes or zipper installation? Keep a general-purpose lockstitch machine in the plan; none of these three is a replacement for that role.
Do not treat the product pages' maximum-speed figures as interchangeable: the current b62 page lists 1,300 stitches per minute, while its March 2026 manual lists 400–1,200. Verify the exact seller bundle and service channel as well. A manufacturer feature list establishes the model's intended configuration, not current retail stock or a particular seller's box condition.
Manufacturer references: b62 AIRLOCK, b64 AIRLOCK, standard b68 AIRLOCK, b68 Maker, and the b60-series comparison brochure.