How a Plate-Loaded Machine Is Built at Sawgym
Follow a single plate-loaded chest press from raw steel coil to shipping crate — cutting, robotic welding, 9-stage powder coat, upholstery, and a 47-point QC checklist.
This is what happens inside the Shandong factory between a customer purchase order and a shipping container. The example is a plate-loaded iso-lateral chest press — one of our most common commercial units — but the process is the same across every strength machine in the Sawgym line.
1. Steel intake and cutting
Frames use 3 mm cold-rolled steel tube (typically 75 × 75 mm and 50 × 100 mm sections) from a single Chinese mill we have qualified since 2011. Coils are laser-cut and CNC-bent to spec. We do not sub-contract cutting — every tube is traceable to a heat number.
2. Robotic MIG welding
Weld cells run six-axis robots for the repeatable joints (main uprights, cross braces, foot plates) and skilled human welders for the load-bearing pivots and press arms. Every welded frame goes through a fixture check before it leaves the cell — geometry within ±1 mm across the frame.
3. Shot blasting and 9-stage powder coat
Frames are shot-blasted to remove mill scale, then run through nine stages: degrease, rinse, phosphate, rinse, passivate, rinse, dry, powder coat, cure. Cure oven holds at 200 °C for 25 minutes. Coating thickness target: 90–110 microns. This is the single biggest reason our frames survive 24/7 commercial use without rust bleed.
4. Upholstery
Pads are cut from high-density closed-cell foam and wrapped in commercial-grade vinyl (rated for gym cleaning chemicals). Every pad is stapled to a marine-grade plywood backing. We stitch our own upholstery in-house — no third-party supplier drift.
5. Sub-assembly and final assembly
Bearings, bushings, cable pulleys, weight horns, and grips are pressed and torqued to spec on sub-assembly benches. Final assembly happens on a moving line: frame → pads → arms → cables → hardware kit → user manual.
6. 47-point QC checklist
Every machine is tested against a 47-point checklist before it is boxed. This includes: static load test at 150 % of rated capacity, cable travel and return, pivot smoothness under load, upholstery adhesion, powder-coat inspection under 500-lux light, and hardware torque re-check. Any fail sends the unit back — no unit ships with a red tag.
7. Packing and container loading
Frames go into foam-lined double-wall cartons with corner protectors. A typical 40HQ container ships around 24 selectorized units or 28 plate-loaded units, depending on mix. Container manifest, spare parts kit, and installation drawings ship with the container.
Want to see this in person? Factory visits are available for qualifying commercial customers.