Commercial 100kg Chest Press Design

I need a full engineering package for a commercial-grade chest press machine that will live in professional Indian gyms. The machine must handle a 100 kg selectorised weight stack and feel smooth and natural under load. Key mechanical goals • Use a steel tube capsule frame; propose the optimal wall thickness and section size for both strength and cost-efficiency under heavy daily use. • True isolateral movement arms are non-negotiable. I want balanced resistance through the stroke so each side can move independently without crossover. • Overall footprint, seat height, and press path must suit the average Indian user and the tighter floor plans common here. Aim for a compact stance without sacrificing full chest engagement or shoulder safety. • Specify bearing types, pulley diameters, cable routing, and finish that meet commercial durability standards. Deliverables 1. 3D CAD files (STEP or SolidWorks) showing complete assembly and exploded views. 2. Detailed 2D fabrication drawings with tolerances, weld symbols, and cut lists. 3. Bill of materials including material grades, fasteners, and surface coatings. 4. Finite element analysis summary confirming frame integrity at 150 % of rated load. 5. Assembly and maintenance manual draft for gym staff. Acceptance criteria • Smooth, balanced press action from full stretch to lockout with ≤2 ° arm misalignment. • Static safety factor ≥2.0 on all load-bearing components. • Finished machine footprint under 1400 mm × 1100 mm and max height 1600 mm. • Total empty machine weight under 180 kg while staying rigid. If you have prior experience designing selectorised strength equipment or can share FEA reports from similar projects, that will help me award quickly. I am ready to review timelines and iterate fast once I see your initial concept.