Pendant control boxes
- System: base + 1–2 articulated arm sections + enclosure; arm lengths 400–1200 mm in combination
- Rotation: joints rotate 360° with position self-locking; enclosure height set by the operator station
- Cable routing: all cables run through the hollow bore inside the arm, no exposed or dragging cable
- Load: 20–60 kg calculated from arm length and enclosure weight, with a 1.5 safety factor
- Enclosure: sheet metal / cast aluminum / stainless steel; panel cutouts per the component drawing
Specifications
The table below covers 80% of factory distribution room cases. Anything outside it we can still build — those are engineered items, quoted separately, with an indicative price the same day.
| System composition | Base + articulated arm (1–2 sections) + arm-end flange + control enclosure |
|---|---|
| Arm length combinations | 400 / 600 / 800 / 1000 / 1200 mm arm sections combined as needed |
| Load capacity | End-of-arm load 20–60 kg (derated by arm length, verified against the selection table, safety factor 1.5) |
| Rotation | 360° horizontal joint rotation with self-locking at stop positions (ratchet / friction brake) |
| Wiring | Hollow bore inside arm sections φ25–φ40, cable fully concealed along its run |
| Base | Machine-top mount / column side mount / floor-standing column |
| Surface finish | Cast aluminum or powder-coated steel arm; sheet metal enclosure with powder coating or stainless steel |
| Protection | Enclosure IP54 (GB 4208 / IEC 60529) |
| Enclosure form | Square operator box / sloped operator box / round operator box, replaceable front panel |
|---|---|
| Panel cutouts | Cut to component drawing: φ22/φ30 pushbuttons, HMI cutout, emergency stop, meters |
| Internal layout | Terminal blocks + intermediate relay positions, or operator panel only (logic in the main cabinet) |
| Cable interface | Cable gland entry at the arm end, exit at the bottom of the box to panel components |
| Signal transmission | Operator signals only (logic recommended in the main cabinet) or PLC inside the box (per project design) |
| Grounding | Enclosure and arm bonded section by section down to the base |
| Single-arm machine-side station | One arm section + operator box, the most common setup for small and mid-size machine tools |
|---|---|
| Dual-arm crossover station | Two arm sections reaching across equipment, for large production line machinery |
| Two-sided station | Operator box with panels on both faces, for operation on either side of a conveyor |
| Floor-standing column station | Floor column + cantilever arm, for locations with no mounting surface |
| Stainless steel washdown station | 304 enclosure + stainless steel arm, for washdown on food lines |
| Custom build | Special arm lengths, non-standard panels, machined to drawing |
| Structural standard | GB/T 7251.1 / IEC 61439-1 (mechanical structure section) |
|---|---|
| Load test | 1.5× rated end-of-arm load applied statically for 10 min; arm-end deflection ≤3 mm with no permanent deformation |
| Rotation life | Type verification of the joint rotation and self-locking mechanism to a 10,000-cycle basis |
| Cable routing inspection | Cable inside the arm rotates through the full joint travel with no interference and no pinching; inspected unit by unit |
| Documents with shipment | Arm system drawing, load selection table, panel cutout drawing |
Five steps to specify your run
A configuration summary is generated as you go. It travels with your inquiry, saving a round of confirmation.
Build details
Systems have been in service for decades, and the failure points are always the same few: poor busbar contact, water ingress at the door seal, high temperature rise in the correction cabinet, and mis-phased outgoing feeders. The six hard rules below are written for exactly these points — every cabinet can be traced to them.
No exposed cable — non-negotiable
Cables run through the hollow bore of each arm section and rotate with the joint without pinching — exposed trailing cable under continuous rotation will chafe through eventually; every unit ships only after a full-rotation check confirms no interference.
What hangs on the arm end stays on the arm end
Static load test at 1.5x rated load for 10 minutes: arm-end deflection ≤3 mm with no permanent deformation. The load selection table applies a length-based derating with full safety margin; oversized-load requests are declined outright.
The box stays where you put it
The joint rotates 360° with ratchet or friction self-locking — the operator pushes it into position, lets go, and it does not spring back. A cantilever box without self-locking wobbles during operation and ruins the button feel.
Change the layout, keep the box
The panel is independent of the enclosure. When the component layout is revised, only the panel is replaced and re-punched; the arm system and enclosure shell stay in service.
No hidden surprises inside the box
We recommend using the box as a pure operator panel and keeping logic in the main cabinet: a cantilever box sees high vibration and has limited space, so stuffing relays and power supplies into it puts failure points in the hardest-to-service location.
Every rotating part must be grounded
The box, each arm section, and the base are bonded section by section with braided wire — rotating parts are floating metal, and skipping one section creates a ground fault point.
Photos & enclosure construction
Below are photos taken in our own shop — from the complete unit down to the internal busbars and secondary wiring. Every build detail can be checked item by item.
Image key: 01–05 are shop photos (the numbers match the shot list). The line drawing shows the front elevation of the enclosure; dimensions match the specification table above.
Where these cabinets go
These are the routine applications — we can talk scheme and configuration directly. For the industry view, see the industry pages.
Machine tool operator station
Machine-side HMI and pushbutton station for CNC and special-purpose machines, delivered to the station on a cantilever arm.
Assembly line
Station-cycle operator panel, with arm length spanning over the conveyor to reach the position.
Food line washdown
304 enclosure with stainless steel arm, for washdown environments.
Large equipment
Dual-arm span station, delivering the operator panel to the far side of the equipment.
Line retrofit
Floor-mounted pedestal station for locations with no mounting surface — no civil work required.
Equipment OEM
Batch supply of machine-mounted operator stations for equipment builders, with panels screen-printed to drawing.
Commercial terms
Specification dated September 2026; quotations follow this.
| Drawings & design | Free |
| MOQ | 1 unit (5 or more recommended for production) |
| Production lead time | 15-25 days after drawing approval |
| on-time delivery | 98% |
| Warranty | 12 months |
| Loading port | Ningbo / Shanghai, China |
| Sheet steel | Baosteel / Ansteel cold-rolled sheet (SPCC) / 304 stainless steel |
| Factory visit & dispatch confirmation | Factory visits welcome; finished-cabinet photos and video before dispatch |
| Capacity | 5,800+ units / year |
Documents for your engineering team
Selection manual, outline dimensions and RFQ checklist — for the customer's electrical engineer. All three documents are being organized by product line; download links go live once complete.
Six questions procurement and electrical engineers ask most
How heavy a box can the cantilever carry?
Arm-end load is 20–60 kg, but it derates with arm length — a 1,000 mm dual arm has a noticeably lower actual limit than a 600 mm single arm. Send us the box dimensions and component list, and we will calculate against the selection table; if it is overloaded, we will tell you straight to change the approach.
Will the box wobble?
The joint has position self-locking — push it into position, let go, and it does not spring back. A wobbling cantilever box is either overloaded or has no self-locking; we enforce both of these in our factory inspection.
Will the cable chafe at the rotating point?
Cables run through the hollow bore inside the arm and rotate with the joint through the full range. Before shipment, every unit undergoes a full-travel rotation check for no interference and no pinching. We do not build exposed-cable routing.
Can I buy just the arm system and make my own box?
Yes. The arm system and box ship separately. We provide the arm-end flange dimension drawing, and your box interfaces to the flange.
How do I choose between this and a wall-mount enclosure?
If the operator position is fixed and cabling runs along the wall, choose a wall-mount box. If the operator needs to walk around the equipment and the panel needs to follow, choose a cantilever. Many installations end up as a main cabinet plus cantilever operator station combination.
What is the lead time?
Standard arm sections with a standard enclosure: 15–20 days. Special arm lengths or stainless steel enclosures: within 25 days. Volume supply schedules are quoted separately.
Other cabinet types in the same main circuit
Related products use color-block placeholders for now (product photos not yet complete; they will be replaced together). Internal links will be filled in once live URLs are confirmed.
Send us photos of the machine and the operator station, and we will size the arm length for you
Send us machine photos, station distances and a component list, and we will provide a free cantilever arm design and load calculation · reply within 24 hours. Direct from the source factory, MOQ 1 unit, 1-year warranty.
ISO 9001:2015 · CE(LVD+EMC) · CQC · IP65
When you write, include: single-line diagram or primary scheme, switch room layout, load list, and component brand requirements. You do not need complete drawings — capacity and cabinet type are enough to start.