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Janome MyLock 634D

By Janome

MSRP: $799.00
SKU#: 634D

This product is not available for purchase online. Please Contact Us for pricing & purchase options.

When you want to make the most of your serging time, with professional results, the MyLock 634D is unmatched. It has 2 needles and 2, 3 or 4 thread overlock stitching. Threading is a breeze due to color-coded thread guides and a self-threading lower looper. The MyLock 634D also lets you quickly switch to rolled hemming without changing the needle plate.

Easy Threading Chart

The Threading Chart and Color-Coded Guides are easy to follow for 2, 3, or 4 thread serging.

Easy to Thread Lower Looper

Threading the Lower Looper is a breeze when you have easy access. Just rotate the thread guide and the lower looper thread guides pop into view.

Quick Change Rolled Hem

No need to change the needle plate for rolled hemming. Just slide the needle plate to “R” position and choose “RH” on the lower looper pre-tension slider.

Adjustable Cutting Width

By turning the dial, you can easily adjust the desired cutting width.

Retractable Upper Knife

Simply press in the knob and push the knife down to deactivate.

Differential Feed

The 634D has a Differential Feed Device with two feed dogs, virtually eliminating puckered edges on woven fabrics and stretched edges on knits.


  • 2, 3, or 4 thread overlock
  • Lay-in thread tension dial
  • Seam width: 1 - 5mm seam length3.3mm (narrow), 7.5mm (wide) 2.0mm Rolled hem
  • Slim foot
  • Handy needle threader
  • Convenient thread cutter
  • Easy rolled hem change-over
  • 0.5 - 2.2 differential feed ratio
  • Easy upper knife release
  • Adjustable cutting width: 3.1 - 5.1mm
  • Easy lower looper threading
  • Differential feed
  • Lower looper pre-tension setting slider
  • Changeable thread guide
  • Front and back needle guard
  • Retractable upper knife
  • Numbered tension dials
  • Color-coded thread guides
  • Snap-on presser feet


Janome America, Inc. Limited 5 Year Warranty

Janome America Inc warrants this Janome sewing machine head for a period of 5 years from the date of original purchase against defects in material or workmanship with the exception of the electrical and/or electronic equipment which is warranted for a period of 2 years from the date of purchase. During the first year from the date of original purchase, defective parts will be exchanged and labor will be provided free of charge. After the first year and during periods of limited warranty, defective parts will be exhanged free of charge, but at the owner's expense for labor. Postage and transportaion are also at the owner's expense. For service under this warranty, present your Janome product, warranty card, and proof of purchase to the Janome dealer from whom the purchase was made or contact Janome America, In., 10 Industrial Ave, Mahwah, NJ 07430-2205.

This sewing machine is warranted only in normal household (non-commerical) use. Needles, belts, bobbins, needle plates, knives, loopers, and light bulbs are not included in this warranty. This warranty does not cover failures caused by improper maintenance or repair, abuse, normal wear and tear, misuse, or events beyond our control.

This warranty extends only to the consumer who has originally purchased this sewing machine from an authorized Janome dealer or to a figt recipient as evidenced by proper return of warranty card. The names and addresses of authorized Janome/New Home Dealers are available upon request.

Except as stated above, there are no other warranties, expressed or implied. Janome America, Inc. shall not be liable for any incidental or consequential damages directly or indirectly arising from use or inability to use this product or from any other cause. Some states do no allow the exclusion or limitation of incidental or consequential damages, so the exclusion or limitation may not apply in all cases.

  • Screwdrivers
  • Tweezers
  • Spreader
  • Nets
  • Set of needes
  • Spanner
  • Upper knife
  • Thread stripping discs
  • Lint brush
  • Oil
  • Needle threader

Machine Overview

Threading Tutorial

Basic Operations

Rolled Hem Tutorial

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