What does MSTFAB manufacture?

MSTFAB is the international brand of Guangzhou Maisituo Sheet Metal Manufacturing Co., Ltd. It makes drawing-defined sheet metal parts and empty mechanical enclosure shells for OEM buyers, using laser cutting, CNC bending, welding and mechanical assembly. Surface treatments such as powder coating may be coordinated with external partners depending on the order.

Which materials does MSTFAB work with?

Common options include carbon steel, galvanized steel, stainless steel and aluminum. Grade, thickness, dimensions, critical tolerances, hardware, finish and inspection criteria are specified per project on the approved drawing.

What are the MOQ and lead time for custom sheet metal parts?

There is no single MOQ or lead time that applies to every part. MOQ, price, achievable tolerances, lead time, finishing route and inspection deliverables are confirmed in the project quotation and purchase order after the drawing is reviewed.

Does MSTFAB supply electrical components or certified finished equipment?

No. The normal supply scope is fabricated metalwork and empty mechanical housings. Electrical components, wiring, software, system integration and final equipment certification remain with the buyer unless a written quotation or contract explicitly includes them.

How do I request a quote?

Send STEP, STP, DXF, DWG or PDF files with the drawing revision, material and thickness, quantity, critical dimensions, hardware, finish, inspection needs and delivery destination through the RFQ page at https://mstfab.com/contact/.

Belt Guard RFQ: Clearance, Access and Retention Checklist

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Machine guard RFQ

A belt guard is more than a bent cover, but the fabricator cannot invent the machine risk assessment. The buyer must define the hazard envelope, access rules and required safety standard before metal is cut.

Direct answer: provide the maximum moving envelope, mounting datum, required clearances, access conditions and retention method. Then the fabricator can review bends, joints, fasteners, openings and inspection points without guessing at safety intent.

Custom sheet metal belt guard shell for RFQ review — Guard geometry should begin with the machine hazard and maintenance envelope supplied by the buyer or machine designer.

Define What the Guard Must Keep Apart

Show pulleys, belts, tension adjustment, expected movement, adjacent controls and the nearest operator or service space. Include the operating and maintenance states. A guard that clears the belt in one position may interfere after tensioning or block the tool needed for routine service.

Hazard envelope

Provide the maximum moving and adjustment envelope plus the required separation from openings and fixed surfaces.

Access condition

State who removes the guard, with which tool, and whether it remains attached, hinged or fully removable.

Mounting and retention

Locate brackets, studs, hinges, captive hardware and machine datums; identify loads or vibration inputs used by the design.

Heat and debris

Define ventilation, drain or cleanout needs without creating an opening that conflicts with the safety assessment.

Chinese sheet metal engineer reviewing a belt guard drawing — The DFM review checks fabrication and access while the machine designer retains responsibility for the guarding concept.

Buyer Trust Table

Control	Evidence	Ownership
Hazard and clearance envelope	Buyer-controlled model or drawing	Machine designer or buyer defines and approves
Fabricated geometry	First-article dimensions, fit and hardware check	Fabricator verifies against the released drawing
Finish and edge condition	Visual criteria, coating scope and edge inspection	Agreed in the PO and inspection plan
Machine safety validation	Risk assessment and validation record	Buyer, integrator or responsible machine builder

Chinese worker welding a custom sheet metal guard assembly — Weld sequence and fixture planning help control shape, but acceptance still follows the buyer-approved guard drawing.

Send a Guard Package That Can Be Checked

Provide a 3D assembly context, not only an isolated guard model.
Mark mounting datums, maximum component movement and keep-out zones.
Specify sheet material, thickness, openings, finish and visible faces.
Identify captive or tool-operated hardware and service sequence.
List critical dimensions and the fit check required on the first article.
Confirm who owns machine-level risk assessment and final validation.

MSTFAB fabricates drawing-defined sheet metal guards, brackets and mechanical assemblies. It does not determine whether a guard makes a machine compliant or safe for a particular use. That decision remains with the responsible designer, integrator and buyer.

Chinese worker inspecting a fabricated belt guard — Inspection should connect clearances, mounting points and retained hardware to the released revision.

Frequently Asked Questions

Can the fabricator design the safety clearance?

The fabricator can flag manufacturing conflicts, but the responsible machine designer must define and approve safety distances and the guarding concept.

Should a belt guard be ventilated?

Only when the thermal and debris requirements allow it and the opening pattern remains consistent with the buyer’s safety assessment.

What makes a useful first article?

A representative guard with real mounting features, access hardware, finish and critical clearance dimensions, checked against the machine interface.

Review the Guard in Its Machine Context

Send the assembly model, hazard envelope, mounting datums and inspection points for a fabrication-focused review.

Send the belt guard RFQ