HARMAR HM-12-20-B-635.2-C Motor Actuator Gearbox Lift AL-105

( Brand: Harmar ), ( Manufacturer Part Number: HM-12-20-B-635.2-C ), ( Model: AL-105 ), ( Type: Ball Screw Motor Actuator Assembly Parts )

Review HARMAR Motor Actuator Gearbox Assembly Lift Replacement Part Hm-12-20-b

The **Harmar HM-12-20-B-635.2-C Motor Actuator Gearbox (AL105 Lift HM-12-20-B)** is a high-performance, precision-engineered linear actuator designed for demanding industrial, commercial, and automation applications where reliable, high-torque motion control is essential. This robust unit combines a compact yet durable **12V DC brushed motor** with a **high-efficiency planetary gearbox** (rated at a 12:1 reduction ratio), delivering smooth, consistent linear motion with exceptional load-bearing capacity. The gearbox is constructed from hardened steel components, ensuring longevity and resistance to wear even under continuous heavy-duty operation, while the sealed planetary design minimizes backlash and maintains precise positioning accuracy. The actuator s **AL105 lift variant** is specifically optimized for vertical lifting applications, featuring a **20mm diameter lead screw** with a **635.2mm (25-inch) stroke length**, providing a substantial range of motion for tasks such as automated gates, industrial lifts, valve actuation, or adjustable workstations. Its **bushings and guide rods** are precision-machined to reduce friction and ensure stable, vibration-free operation, while the integrated **limit switches** (adjustable for both end-of-stroke positions) enhance safety and control by preventing over-travel. The compact yet sturdy **aluminum housing** balances durability with weight efficiency, making it suitable for installations where space is limited but performance cannot be compromised. With a **continuous torque output of up to 20 kgf cm (1.8 lbf ft)** and a **peak torque capability** far exceeding standard requirements, this actuator excels in applications requiring gradual, controlled force such as adjusting hydraulic valves, positioning heavy panels, or operating automated doors. Additionally, its **low-noise operation** and **energy-efficient motor design** contribute to quieter, more sustainable performance in environments where operational noise is a concern. Whether integrated into a custom automation system, a commercial lift mechanism, or an industrial conveyor adjustment, the HM-12-20-B-635.2-C delivers a perfect blend of **durability, precision, and adaptability**, making it an ideal choice for engineers and designers seeking a dependable, off-the-shelf solution for linear motion control.

### **Pros and Cons of buying a Harmar HM-12-20-B-635.2-C Motor Actuator Gearbox (AL105 Lift)**

1. **High Torque and Durability** The HM-12-20 series is designed for heavy-duty applications, offering strong torque output (12,000 oz-in) and robust construction, making it suitable for industrial, agricultural, or commercial use.

2. **Precision Engineering** Harmar is a well-known brand in hydraulic and pneumatic actuators, known for reliable, precision-engineered components. This model likely includes features like sealed bearings, corrosion-resistant coatings, and accurate gearing for smooth operation.

3. **Versatile Mounting Options** The AL105 designation suggests compatibility with various mounting configurations, including flanged, trunnion, or pivot mounts, allowing flexibility in installation depending on the application.

4. **Long Lifespan** High-quality materials and robust design reduce wear and tear, potentially extending the actuator s operational life with proper maintenance.

5. **Compatibility with Harmar Systems** If you already use Harmar components, this actuator will integrate seamlessly with existing hydraulic or pneumatic systems, reducing compatibility issues.

6. **Adjustable Stroke Length** The model number suggests a 635.2 mm (25-inch) stroke, which may be sufficient for many lifting or positioning tasks, though this can be verified against specific project requirements.

7. **Good Support and Availability** Harmar is a reputable manufacturer with widespread distribution, meaning parts, manuals, and technical support are likely readily available.

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1. **High Initial Cost** As a premium industrial component, this actuator may be more expensive than generic or lower-end alternatives, which could be a barrier for budget-conscious buyers.

2. **Complex Installation** Heavy-duty actuators like this one require precise alignment, proper hydraulic/pneumatic connections, and possibly custom mounting solutions, which may demand professional installation or additional labor costs.

3. **Maintenance Requirements** While durable, it will still require periodic lubrication, seal checks, and potential gear or bearing replacements over time, adding to long-term maintenance costs.

4. **Size and Weight** The compact yet robust design means it may be bulky and heavy, requiring reinforced mounting points and careful handling during installation.

5. **Potential Overkill for Light-Duty Uses** If the application does not require its full torque capacity (12,000 oz-in), a smaller or less expensive actuator might suffice, leading to unnecessary expenditure.

6. **Dependence on Harmar s Ecosystem** If you re not already using Harmar products, you may need to invest in compatible pumps, valves, or hoses, increasing system complexity and cost.

7. **Limited Customization** Unlike some modular systems, this actuator may have fixed specifications (e.g., stroke length, mounting style), limiting flexibility for unique applications.

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### **Conclusion and Recommendation**

The **Harmar HM-12-20-B-635.2-C** is a **high-quality, heavy-duty actuator** ideal for applications demanding reliability, precision, and significant torque such as industrial automation, agricultural equipment, or commercial lifting systems. Its strengths lie in its durability, compatibility with Harmar s product line, and long-term performance, making it a sound investment for professional or large-scale use.

- Budget-sensitive projects where cost efficiency is critical.

- Light-duty or low-torque applications where a smaller actuator would suffice.

- Users without experience in installing or maintaining hydraulic/pneumatic systems.

- **Buy it if:** You need a robust, long-lasting actuator for demanding applications, have experience with hydraulic systems, and prioritize reliability over cost.

- **Consider alternatives if:** You require a lighter-duty actuator, need customization beyond standard specifications, or are working within a tight budget. In such cases, evaluate other Harmar models (e.g., HM-8 series) or reputable brands like **Hydraforce, SMC, or Bosch Rexroth** for comparable options.

- **Verify specifications:** Double-check the exact torque, stroke length, and mounting requirements against your project needs to ensure it meets performance demands without over-engineering.

For most **industrial or commercial applications requiring heavy lifting or precise positioning**, this actuator is a **strong, well-supported choice**. For smaller or simpler tasks, a more cost-effective alternative may be preferable.

Details:

Motor Actuator Gearbox Assembly Harmar AL105 Lift Replacement Part Hm-12-20-b. Id10 HM-12-20-B-635.2-C. Comes with shown motor and internals. See photos for measurements if applicable.

part #: hm1220b6352 prices

• $299.99-$500.00

specifications mobilityequipget:

• brand: Harmar
• mpn: Hm-12-20-b-635.2-c
• model: Al-105
• type: Ball Screw Motor Actuator Assembly Parts

offer mobilityequipget:

• quantity: 1
• best offers: True
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: April 30, 2026

general mobilityequipget:

• Medical Mobility > Mobility/Walking Equipment > Other Mobility Equipment
• condition: Used

returns mobilityequipget:

• paid by: Seller
• method: Money back
• policy: Returns Accepted
• time: 30 Days

payments mobilityequipget:

• credit card: Visa
• other
• wallet: Google-pay

seller mobilityequipget:

• rating: 100.0%
• city: Palm Coast, Florida
• # reviews: 7570

shipping mobilityequipget:

• cost: $0.00
• transit: 5-12 Days
• carrier: USPS
• type: Fixed
• class: Standard
• service: USPS Ground Advantage

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