Double Sided Grooved Disc with Groove Depth Referenced to Own Face and Interrupted Sealing Face Texture for 0.01mm Face Parallelism

Double-sided grooved disc: each groove depth is referenced to its own sealing face, and sealing faces are texture-turned to stop fluid migration.

• Groove depth±0.02 mm, measured from the adjacent face — not from stock
• Face parallelism0.01 mm between both sealing faces
• Order size1 piece prototype in 3–7 working days, passivated
• Quality systemISO 9001:2015
• MaterialsSS316L / 304 / 303, brass C36000
• DeliverySealing faces protected in transit
• Track recordExporting since 2008

A disc with a groove in each face looks symmetrical, so it is often programmed as if it were. It is not. Each groove has to be cut to a depth measured from the face it seals against, and when the part is flipped the reference changes. Cut the second groove to the same depth from the chuck instead of from the finished face, and the two seals sit at different heights — the joint pulls down on one side, the O-ring takes the load unevenly, and the leak appears only after the bolts are torqued.

The other leak path is invisible in a dimensional report: the spiral tool mark left by facing. A face turned in a continuous spiral gives fluid a continuous channel from the bore to the outside diameter. We finish sealing faces with a wiper insert and a controlled feed so the texture is a fine, interrupted pattern rather than one long spiral, then measure roughness and flatness on both faces and report the groove depth of each side against its own reference.

• Material: SS316L for aggressive media, SS304 general, SS303 for fine finish, brass C36000 for instrumentation, 17-4PH where strength is required, aluminium 6061 for lightweight covers.
• Groove forms: O-ring groove, face seal groove, labyrinth groove, V-groove, double or triple concentric grooves, groove with a drain cross-hole.
• Body forms: flat double-sided disc, stepped disc, spigotted disc, disc with centre boss, disc with bolt circle, disc with lightening pockets.
• Finish: passivation per ASTM A967, electropolish for hygienic and vacuum service, bead blast, black oxide, nickel plating, as-machined.
• Size: diameter 15 mm to 300 mm, thickness 3 mm to 40 mm, groove width from 0.8 mm.
• Input: STEP, IGES, DXF, PDF drawing, or a sample disc we measure and re-model.

A groove layout describes a seal, and a seal layout describes how a system is meant to hold pressure — that is confidential engineering, not a commodity dimension. We sign a mutual NDA before any file is opened, in English or Chinese or on your own form, and return a countersigned copy before work starts. Access is limited to the project engineer, the lathe programmer and the cell supervisor, with the file in a restricted folder rather than the open shop network. No photographs of customer parts are taken for our catalogue or website, customer parts are never displayed or reused as samples, subcontracting requires your written approval, and at program close files and inspection data are deleted or returned with written confirmation.

Dongguan Changxinda Precision Technology Co., Ltd has been machining custom parts since 2008: 15+ years, 90 to 100 staff, 50–60% exported to North America and Europe, 200+ customers served, turnover in the RMB 10–20 million band. The floor holds CNC lathes, turn-mill combined centres with live tooling and sub-spindle, and 4-axis / 5-axis machining centres under an ISO 9001:2015 system, producing parts for medical, robotics, automotive, aerospace, automation, laser, LED, lithium battery and precision instrument programs. Turning, grooving, passivation coordination and CMM inspection are all in our own plant in Dongguan.

Sealing discs and turned plates from this plant ship into ten industries. Each line is a category we machine regularly, with the parts customers actually order.

All ten sectors run through the same plant and the same ISO 9001:2015 inspection discipline — only the material, finish and documentation package change.

• Prototype: 3–7 working days after drawing approval, including passivation.
• Small batch 10–100 pcs: 7–14 working days.
• Repeat orders: run from archived programs, soft jaws and groove tool list; groove depth and parallelism repeat to the same values.
• Capacity: 10,000 pieces per month across the plant.
• Visibility: a dated progress note with photographs of your actual discs at turning, grooving and inspection.
• Shipping: faces interleaved with protective film, parts packed flat in foam-lined export cartons, no face-to-face contact in transit.
• Rush: overtime slots and an express passivation line held weekly; tell us the deadline and we confirm before you order.