Crystal & Case Presses

Choose a complete press for its stated case scope

The JOREST screw press is offered for round snap/pry-back dials labeled 22–42 mm. The seller excludes square and oval cases, screw backs and multi-groove backs. It includes eight physical dies, with two size labels on each, plus film and an English manual. That makes its stated case scope more useful than treating the largest die label as a maximum watch size.

The Ejoyous press uses a manual screw, a stainless-steel/aluminum body and M6 upper and lower receiving threads. Its twenty physical dies include round, square and shield-shaped profiles. Choose this assortment for a verified contact and attachment requirement, not just because it supplies more shapes: the listed 5500A/C naming and M6 thread do not establish universal compatibility with every press or die.

Match the receiver and the working face

The JuxLux offer is eight shaped plastic dies with copper thread inserts, labeled 20–45 mm. It is an accessory set for a desktop press; handheld pliers are explicitly excluded. The exact thread and pitch are not specified, so check the receiving interface before adding it to a tool already on your bench.

The hengfento2 assortment instead contains seven metal dies described as 316L stainless steel, with 5500A/C compatibility claimed. The listing gives separate inside and outside diameter lists without a reliable one-to-one map. If an internal recess or outside bearing face determines the fit, confirm that individual die rather than pairing the lists yourself. The photo’s thread components also do not establish a universal adapter arrangement.

Compare crystal compression with pressure removal

The Bergeon 4266 uses gripping/compression contact for removal and insertion of “unbreakable” crystals without a tension ring, with a stated 10–45 mm range. That is a specific crystal scope, not a general mineral- or sapphire-crystal fit claim. Match the actual crystal construction and contact before choosing it in place of a press.

The Keenso tool is offered for crystal pressure removal from one-piece cases. Its contents identify a pump, four spare nozzles and a prying piece; a fitted nozzle is also shown. No nozzle-size schedule or maximum pressure is supplied. This is not a bench dust blower and does not provide a universal removal procedure—choose it only for the documented case operation and required nozzle interface.

Read dimensions at the correct contact

A double-labeled die is still one physical die. The JOREST assortment runs from 50/48 down to 26/24 labels, while the seller’s stated round-case scope is 22–42 mm. The Ejoyous frame’s 12 × 10 × 20 cm dimensions describe the exterior, not working stroke. Use the actual receiving thread, bearing face and required access as separate checks.

Keep closing a case separate from assessing its sealing condition. A press or die assortment does not certify water resistance. Follow the watch maker’s requirements for the particular construction, and choose any required service or testing separately rather than inferring it from a back that has been closed.

Examples for the working choice