Promax 16mm 2-Hole Aluminum Push Button Enclosure - Industrial Switch Control Box with Flanged Mounts

Specifications

• Material: Anodized Aluminum Alloy (Shell) / Heavy-Duty Plastic (End Caps)

• Hole Diameter: 16mm

• Hole Count: 2

• Overall Dimensions (L x W x H): Approx. 122.7mm x 45mm x 51mm (including mounting ears)

• Mounting Style: Surface Mount via Flanged End Caps

• Cable Entry: Waterproof Cable Gland included

Key Applications and Projects

• CNC Machine Pendants: Building a remote stop/start or feed-hold control box for a custom CNC router or lathe.

• Sim Racing Button Boxes: Creating a rigid, metal dashboard enclosure for ignition switches and starter buttons on a DIY racing simulator.

• Industrial Automation: Housing heavy-duty 16mm indicator LEDs and reset buttons on an assembly line.

Unlock New Capabilities (Project Evolution)

• The Smart Home Control Node: Take this industrial hardware into the 21st century! Because the aluminum shell is spacious, you can easily hide a tiny ESP8266 or Arduino Micro microcontroller inside. Wire two 16mm illuminated push buttons to the microcontroller, flash it with custom IoT firmware (like ESPHome), and use this rugged metal box as a wall-mounted WiFi trigger to open your garage door or turn on all your workshop lights at once!

ACCESSORIES / PACKAGE INCLUDED

• 1 x Promax Aluminum Enclosure Shell (Pre-drilled for 2 x 16mm holes)

• 2 x Flanged Plastic End Caps ("Ear Holders")

• 1 x Waterproof Cable Gland

• 8 x Assembly Screws

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What size buttons fit in this enclosure? The top plate is pre-drilled specifically for 16mm diameter push buttons, switches, or indicator lights.

2. How many holes does this specific box have? This model features two pre-drilled holes.

3. What material is the main shell made from? The main central body is made from thickened, extruded aluminum alloy.

4. Are the end caps made of metal too? No, the dark grey end caps are made from rigid, heavy-duty industrial plastic to allow for secure screw threading and electrical isolation.

5. What are the overall dimensions of the box? Including the mounting flanges, it measures approximately 122.7mm long, 45mm wide, and 51mm tall.

6. Can I fit a standard 22mm button in this? No, the holes are strictly 16mm. A standard 22mm button or Emergency Stop will not fit without manually drilling out and enlarging the metal holes.

7. Does the enclosure come with switches? No, this product is the empty enclosure box and mounting hardware only. Switches must be purchased separately.

8. Is this switch box waterproof? It features a waterproof joint design for the cable entry, making it highly splash and dust resistant (when paired with waterproof switches), but it is not meant to be submerged.

9. What is the white plastic nut included in the kit? That is a waterproof cable gland (strain relief). It secures the wire where it enters the box, preventing it from being yanked out and stopping water from getting inside.

10. How do I mount this box to a machine or wall? The plastic end caps feature integrated "ear holders" (flanges) with slotted holes, allowing you to bolt the box directly to a surface.

11. Do I need to drill my own holes for the wires? No, one of the plastic end caps features a pre-cut hole with a locking groove specifically sized to accept the included cable gland.

12. Can I drill additional holes in the aluminum? Yes, because it is an aluminum extrusion, you can drill or tap additional holes if you need to mount a side-facing switch or custom connector.

13. Does the metal shell need to be grounded? Yes. As a best practice for electrical safety—especially if you are switching high-voltage AC current (110V/220V)—the metal chassis should be tied to earth ground to prevent shock in case of an internal short.

14. How does the box assemble? The aluminum shell slides over the internal track, and the plastic end caps are secured to the metal profile using the eight included Phillips-head screws.

15. Can an Arduino board fit inside this box? Yes, very small microcontrollers like an Arduino Nano, Micro, or an ESP8266 board can comfortably fit inside the 31mm x 42mm internal cavity alongside standard switch contacts.

16. Can I use this enclosure outdoors? Yes, the aluminum body is rust-resistant. If you use high-quality IP65-rated switches and ensure the cable gland is tightened properly, it will survive outdoor weather.

17. What size wire fits through the cable gland? The standard included PG-style gland typically accepts round multi-core cable diameters between 3mm and 6.5mm.

18. What is the distance between the two button holes? The center-to-center distance between the two 16mm cutouts is exactly 33mm.

19. Can I paint the aluminum body? Absolutely. While the silver anodized finish looks great, you can lightly sand, prime, and paint the aluminum to match your machinery or racing simulator color scheme.

20. What does the "Promax" designation mean? Promax signifies this specific line of heavy-duty, industrial-grade metal control enclosures, differentiating them from standard thin-walled plastic project boxes.