The Auspicious AZ-8112 is a wheel limit switch built around a metal body rather than a plastic one. That housing is the reason it is specified over cheaper alternatives. A plastic case cracks when a load clips it, softens near a hot machine and degrades under coolant and solvents. A metal body takes the knock, holds its shape and keeps the switch mechanism aligned, so the trip point does not drift after the first accidental impact.

The wheel actuator sits on a lever that rotates when a cam, dog or moving part presses against it. Because the wheel turns rather than scraping, friction stays low and the switch survives thousands of cycles without the wear that eventually jams a plain plunger. One normally open and one normally closed contact give a position signal and an interlock from a single unit.

Inside, the essential parts are stainless steel, and the body is dust proof, oil tight and water resistant to IP65. That combination suits machine shops where coolant mist settles on everything, and conveyor lines where dust is constant. It is rated 5A at 250V AC and 0.4A at 125V DC, which covers AC control circuits and DC inputs into a PLC. UL and CE approvals cover it for export machinery.

Key Features

Metal body resists impact, heat and chemical attack
Wheel actuator rolls instead of scraping to reduce wear
1NO and 1NC contacts for signal and interlock together
5A at 250V AC and 0.4A at 125V DC resistive ratings
Wide operating speed range from 0.5mm to 50m per second
IP65 sealing with dust proof and oil tight construction
Stainless steel internal parts resist corrosion
UL Listed and CE Mark certified, made in Taiwan

Technical Specifications

Specification	Detail
Product Type	5A Mini Limit Switch
Model	AZ-8112
Actuator	Wheel
Housing	Metal Body
Contact Configuration	1NO and 1NC
AC Rating	5A at 250V AC resistive
DC Rating	0.4A at 125V DC resistive
Operating Speed	0.5mm to 50m per second
Degree of Protection	IP65
Construction	Dust Proof, Oil Tight, Water Resistant, Stainless Steel Essentials
Certification	UL Listed, CE Mark
Brand	Auspicious
Country of Origin	Taiwan
Weight	0.2kg
SKU	AZ-8112

Common Applications

Machine tool carriage and table position detection, conveyor stop and divert points, guard and cover interlocks, press and slide end of travel, packaging and bottling lines, jig and fixture confirmation, and any installation where the switch sits somewhere it is likely to get knocked, splashed or exposed to coolant.

Choosing the Right Limit Switch

Actuator shape decides how well the switch catches the moving part. A fixed wheel suits a cam arriving at a set height. Where that height varies, the adjustable roller lever limit switch AZ-8108 lets you set the lever length, and the adjustable rod limit switch AZ-8107 gives long reach onto an irregular target. Both share the same 5A rating and IP65 body.

For a push straight onto the switch from more than one angle, the cross roller plunger limit switch ME-8122 is the plunger option. Where an overrun could snap a rigid actuator, the spring limit switch AZ-8166 flexes and returns. For a simple compact side mount unit, the lever limit switch AZ-7120 costs less.

If the load is heavier than 5A or the environment is harsher, step up. The roller plunger limit switch AM-1308 handles 15A, while the big wheel limit switch AZ-5108L and the ball limit switch AZ-5109 are IP67 rated at 10A for lifts, cranes and outdoor plant.

Why Buy From Qahraba

Qahraba supplies electrical contractors, panel builders and machine builders across the UAE and worldwide. Every limit switch we stock is genuine Auspicious product with full certification. Local UAE orders ship within 1 to 2 working days, free above AED 250, or collect free from our Dubai store. Call or WhatsApp +971 52 913 9543 for bulk pricing.

FAQ,s

Why choose a metal body limit switch?

Because it survives what a plastic one does not. Metal takes impact without cracking, handles heat near machinery and resists coolant and solvents, so the switch keeps its alignment and trip point after a knock.

What is a wheel limit switch used for?

It detects when a moving part reaches a set position. A cam or dog presses the wheel, the lever moves, and the contacts change over to signal the controller.

What does 1NO 1NC mean?

One normally open and one normally closed contact. When the wheel is operated, the NO closes and the NC opens, giving two signals from one device.

Can it connect directly to a PLC?

Yes. The 0.4A 125V DC rating covers standard 24V DC PLC inputs, and the 5A 250V AC rating allows direct switching of AC control circuits.

Is IP65 suitable for a machine shop?

Yes. IP65 means the body is dust tight and resists low pressure water jets, and the oil tight construction handles coolant mist. For temporary immersion or outdoor duty choose an IP67 model.

What are the stainless steel essentials?

The key internal parts are stainless steel rather than plated mild steel, so they resist corrosion in damp or oily conditions and keep the mechanism moving freely.

Wheel Limit Switch Metal Body 1NO 1NC IP65 AZ-8112 Auspicious