Description
The Straight Gearbox PL Series is a compact single-stage planetary reduction gearbox for CNC motion systems, automation equipment and machinery using stepper or servo motors. This product group covers PL60 and PL90 frame sizes with 3:1, 5:1, 7:1 and 10:1 ratios, including NEMA23 / 57 mm and NEMA34 / 86 mm stepper interfaces plus servo-compatible versions.
The manufacturer data specifies synthetic lubricating grease, IP65 protection, operation in any mounting direction, service life of 20,000 hours and one-stage efficiency of at least 96% for the PL/PLR family.
Available PL Series Variants
Select the gearbox by motor type, flange size and reduction ratio. The table below lists the Vallder variants for this product.
| Model | Motor Type | Flange | Ratio | 3D Model | PDF Drawing | SKU |
| PL60-L1-57-3:1 – NEMA23 | Stepper | 57 / NEMA23 | 3:1 | 3D ZIP | 1254009 | |
| PL60-L1-57-5:1 – NEMA23 | Stepper | 57 / NEMA23 | 5:1 | 3D ZIP | 1254010 | |
| PL60-L1-57-7:1 – NEMA23 | Stepper | 57 / NEMA23 | 7:1 | 3D ZIP | 1254011 | |
| PL60-L1-57-10:1 – NEMA23 | Stepper | 57 / NEMA23 | 10:1 | 3D ZIP | 1254012 | |
| PL90-L1-86-3:1 – NEMA34 | Stepper | 86 / NEMA34 | 3:1 | 3D ZIP | 1254013 | |
| PL90-L1-86-5:1 – NEMA34 | Stepper | 86 / NEMA34 | 5:1 | 3D ZIP | 1254014 | |
| PL90-L1-86-7:1 – NEMA34 | Stepper | 86 / NEMA34 | 7:1 | 3D ZIP | 1254015 | |
| PL90-L1-86-10:1 – NEMA34 | Stepper | 86 / NEMA34 | 10:1 | 3D ZIP | 1254016 | |
| PL60-L1-3:1 – Servo | Servo | 60 | 3:1 | 3D ZIP | 1254081 | |
| PL60-L1-5:1 – Servo | Servo | 60 | 5:1 | 3D ZIP | 1254082 | |
| PL60-L1-7:1 – Servo | Servo | 60 | 7:1 | 3D ZIP | 1254083 | |
| PL60-L1-10:1 – Servo | Servo | 60 | 10:1 | 3D ZIP | 1254084 | |
| PL90-L1-3:1 – Servo | Servo | 90 | 3:1 | 3D ZIP | 1254085 | |
| PL90-L1-5:1 – Servo | Servo | 90 | 5:1 | 3D ZIP | 1254086 | |
| PL90-L1-7:1 – Servo | Servo | 90 | 7:1 | 3D ZIP | 1254087 | |
| PL90-L1-10:1 – Servo | Servo | 90 | 10:1 | 3D ZIP | 1254088 | |
| All product data (pictures, dimensions, tables, drawings) are provided as received from the supplier; we exclude liability for their accuracy or completeness. | ||||||
PL60 / PL90 Dimensions
The complete dimension table below covers the single-stage PL60 and PL90 gearbox frames used by the listed stepper and servo variants. All dimensions are in millimetres unless otherwise specified. The listed products use the L1 single-stage configuration, so the L4 values below correspond to Size 1.
| Dimension | PL60 | PL90 | ||
| Stepper 57 / NEMA23 | Servo 60 | Stepper 86 / NEMA34 | Servo 90 | |
| D1 | 52 | 52 | 80 | 80 |
| D2 | M5×0.8P | M5×0.8P | M6×1P | M6×1P |
| D3 j6 | 14 | 14 | 20 | 20 |
| D4 g6 | 40 | 40 | 68 | 68 |
| D5 | 17 | 17 | 25 | 25 |
| D6 | M5×0.8P | M5×0.8P | M6×1P | M6×1P |
| D7 | 60 | 60 | 90 | 90 |
| L1 | 30 | 30 | 36 | 36 |
| L2 | 35 | 35 | 40.5 | 40.5 |
| L3 | 3 | 3 | 3 | 3 |
| L4 (L1 / Size 1) | 56 | 56 | 77.5 | 77.5 |
| L5 | 20 | 20 | 25 | 25 |
| L6 | 3 | 3 | 3 | 3 |
| B1 h9 | 5 | 5 | 6 | 6 |
| H1 | 16 | 16 | 22.5 | 22.5 |
| C1* | 70 | 70 | 90 | 90 |
| C2* | M4×0.7P | M4×0.7P | M6×1P | M6×1P |
| C3* | ≤14 | ≤14 | ≤19 | ≤19 |
| C4* | 31 | 31 | 47 | 47 |
| C5* | 50 | 50 | 70 | 70 |
| C6* | 4 | 4 | 6 | 6 |
| C7* | 60 | 60 | 90 | 90 |
| C8* | 21 | 21 | 32 | 32 |
| All product data (pictures, dimensions, tables, drawings) are provided as received from the supplier; we exclude liability for their accuracy or completeness. | ||||
* C1–C8 are motor-side input dimensions. The manufacturer notes that these dimensions refer to the mounted motor type; verify the exact input adapter dimensions for the selected stepper or servo motor before installation.
PL60 / PL90 Technical Data
The table below reproduces the PL-series operating data relevant to the PL60 and PL90 frames used by the listed L1 / single-stage Vallder variants.
| Parameter | PL60 | PL90 |
| Maximum output torque | 1.5 × nominal output torque | 1.5 × nominal output torque |
| Nominal input speed | 4000 rpm | 3500 rpm |
| Maximum input speed | 8000 rpm | 6000 rpm |
| Backlash, PL, 1 stage | ≤14 arcmin | ≤10 arcmin |
| Torsional stiffness | 1.8 N·m/arcmin | 4.85 N·m/arcmin |
| Maximum radial force | 240 N | 450 N |
| Maximum axial force | 220 N | 430 N |
| Service life | 20,000 h | 20,000 h |
| Efficiency, 1 stage | ≥96% | ≥96% |
| Operating temperature | -10°C to +90°C | -10°C to +90°C |
| Degree of protection | IP65 | IP65 |
| Mounting position | Any direction | Any direction |
| Lubrication | Synthetic lubricating grease | Synthetic lubricating grease |
| Noise, PL | ≤58 dB(A) | ≤60 dB(A) |
| Weight, PL, 1 stage | 0.98 kg | 3.12 kg |
| All product data (pictures, dimensions, tables, drawings) are provided as received from the supplier; we exclude liability for their accuracy or completeness. | ||
Construction, Performance and Applications
The PL Series combines a straight-tooth planetary transmission with a compact inline housing for CNC, automation and general motion-control systems. The supplier information below is consolidated into two practical groups so that construction, operating advantages and typical use cases are clear without repeating technical values already shown in the tables above.
Durable Mechanical Construction
The gearbox uses a robust planetary stage with heat-treated high-strength alloy-steel internal components. The supplier specifies a nickel-plated inner tooth ring for improved oxidation resistance, together with an anodized black flange base for a durable, corrosion-resistant external finish.
- Straight-tooth planetary design: Provides efficient mechanical reduction in a compact inline gearbox format.
- Protected internal gearing: Nickel-plated ring gear helps resist oxidation and supports long-term durability.
- Sealed lubrication system: Oil-seal construction is designed to retain lubricant and reduce leakage during operation.
- Heat-treated alloy-steel components: Internal parts are designed for repeated duty in demanding CNC and automation environments.
Compact and Practical Integration
The PL straight-gear design is intended for stepper and servo transmission systems where compact dimensions, practical installation and efficient torque transfer are more important than the very low backlash typically associated with helical planetary gearboxes.
- Stepper and servo compatibility: Suitable for matched NEMA-format stepper motors and servo motors when the motor-side interface is verified.
- Space-saving layout: Short inline construction suits CNC axes, rotary mechanisms and compact automation assemblies.
- Efficient torque transfer: Planetary gear architecture provides multiple gear contacts within a compact housing.
- Typical applications: CNC routers, milling-machine axes, rotary tables, positioning systems, packaging equipment and general automation machinery.
3D Models and Technical Drawings
Download the mechanical reference files for the PL60 and PL90 single-stage gearbox frames. Each frame includes a 3D model package for CAD integration and a PDF dimensional drawing for installation and machine-design checks.
PL60 Engineering Files
For PL60 frame variants used with 60 mm servo motors or 57 mm / NEMA23 stepper motors.
PL90 Engineering Files
For PL90 frame variants used with 90 mm servo motors or 86 mm / NEMA34 stepper motors.
Motor-side interface note: The supplied 3D models show the AC-servo input-side configuration. When a Stepper Motor variant is ordered, the motor-side mounting-hole pattern and input-shaft interface are manufactured to match the corresponding NEMA standard (NEMA23 for PL60 or NEMA34 for PL90). The external gearbox envelope and output-side dimensions remain the same for the corresponding PL60 or PL90 frame, so the machine-side installation space is unchanged between Servo and Stepper versions.
PL Series Gearbox Video
Watch the video below for a visual overview of the PL Series planetary gearbox construction and application.
FAQ frequently asked questions
Which ratio should I choose?
Choose the ratio from the required output speed, torque and positioning requirements. Final sizing must also respect motor torque and gearbox load limits.
Can I use PL60 with a NEMA23 stepper motor?
Yes, the listed PL60 stepper variants use the 57 mm / NEMA23 interface specified in the product variant data.
Can I use PL90 with a NEMA34 stepper motor?
Yes, the listed PL90 stepper variants use the 86 mm / NEMA34 interface specified in the product variant data.
