VEXTA PH266-01GK-C5 Geared 2‑Phase Stepper Motor for Precise, Low‑Speed Positioning

The VEXTA PH266-01GK-C5 is a geared version of Oriental Motor’s classic PH series 2‑phase hybrid stepper. From my experience, this model is a solid pick when you need smooth, accurate motion at low speeds—think indexing jigs, small pick-and-place stations, or precision feeders. The integrated GK gearhead multiplies torque and tightens positioning at the output shaft, while the base PH motor’s 1.8° step angle keeps motion predictable and easy to tune with standard microstep drivers. You might notice that it seems to run cooler and with less vibration than older geared setups, especially in applications that cycle frequently at low RPM.

Typical use cases include:
– fixture clamping with controlled force,
– turntable indexing at defined stops,
– valve actuation where holding torque matters,
– and small conveyors that need repeatable, short moves under load.
One thing I appreciate is the connectorized “C5” option—it usually makes wiring neater and service faster on the shop floor.

Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL

Key Features

• Integrated GK gearhead – Provides speed reduction, higher output torque, and finer effective step resolution at the shaft.
• PH series 2‑phase hybrid motor – 1.8°/step base angle for predictable control with most microstep drivers.
• NEMA 23 (56 mm) form factor – Compact, widely compatible flange size for machine retrofits and new builds.
• Connector option “C5” – Streamlined wiring; typically reduces termination time and mistakes during maintenance.
• Stable low‑speed performance – Geared output helps reduce hunting and improves holding at standstill in many cases.
• Driver‑agnostic – Works with standard 2‑phase stepper drivers; easy to integrate into existing control panels.

Technical Specifications

“We paired the PH266-01GK-C5 with a microstep driver at 48 VDC and got smooth indexing at 5 RPM without overshoot. For a compact NEMA 23 footprint, the geared torque has been more than enough for our clamp actuator.” — Production Engineer, packaging line retrofit

Related or Supporting Products

• VEXTA PK266 series – Newer 2‑phase motors in the same 56 mm class; higher torque options without a gearhead if speed is moderate.
• VEXTA PKP series (High‑Torque) – Compact high‑torque variants; consider PKP with SG gearhead if you need tighter backlash specs or different ratios.
• Oriental Motor CVD series drivers – Microstepping drivers (24–48 VDC) matched for 2‑phase motors; typically quieter with better low‑speed smoothness.
• CVK or AZ series motor‑driver packages – If you prefer a packaged set; AZ adds closed‑loop control with absolute positioning when you need step‑loss detection.
• Flexible couplings and planetary gearboxes – For higher torsional stiffness on the load side or when adapting to non‑standard shafts.

Installation & Maintenance

• Panel & cabinet: Use a ventilated control cabinet for the driver; keep ambient 0–40 °C and avoid condensation or oil mist.
• Mounting: Align the NEMA 23 flange accurately; avoid radial misalignment at the gearhead output shaft. Use flexible couplings where possible to limit bearing load.
• Wiring: Route motor leads away from high‑noise power lines; set driver current to match the motor coil rating; enable holding‑current reduction if your driver supports it.
• Safety: Lock out power before wiring. Geared shafts can back‑drive loads—add mechanical brakes if vertical loads are present.
• Routine checks: Inspect connectors and coupling set screws quarterly; verify backlash and shaft play for gearhead wear in high‑duty cycles.
• Cleaning & updates: Keep vents and fans on the driver dust‑free; update driver firmware where applicable; recalibrate motion profiles after major mechanical changes.

Quality & Certifications

• Manufacturer quality systems typically ISO 9001
• CE and RoHS conformity commonly available for VEXTA stepper families
• UL recognition on many motor/driver combinations (check specific sub‑model)
• Warranty: 365 days (our supply)