Pololu 20.4:1 Metal Gearmotor 25Dx65L mm LP 12V w/ 48 CPR Encoder
Integrates 12V brushed DC motor and gearbox
Offers 979.62 counts per revolution
Features 4 mm D-shaped output shaft
Includes 48 CPR quadrature encoder
Supports versatile mounting solutions
The Pololu 20.4:1 Metal Gearmotor 25Dx65L mm LP 12V w/ 48 CPR Encoder is a sophisticated component designed for precision motion control applications. It integrates a low-power, 12 V brushed DC motor with a 20.4:1 metal spur gearbox, complemented by a 48 CPR quadrature encoder. This encoder provides a high resolution of 979.62 counts per revolution of the gearbox’s output shaft, ensuring accurate feedback for precise control.
The gearmotor features a cylindrical design with a diameter slightly under 25 mm, and a D-shaped output shaft measuring 4 mm in diameter, extending 12.5 mm from the gearbox face plate. The encoder utilizes a two-channel Hall effect sensor to detect the rotation of a magnetic disk, offering square wave outputs that indicate both speed and direction of the motor.
This gearmotor is compatible with various mounting solutions, including custom-designed brackets and multi-hub wheels, allowing for versatile integration into different projects. It can be paired with Pololu's motor controllers and drivers, such as the TB9051FTG-based drivers for LP and MP versions, or the VNH5019-based drivers for HP versions, to achieve optimal performance.
The gearmotor's design facilitates easy swapping with other models in the same series, thanks to its consistent 25 mm diameter case and 4 mm output shaft. This flexibility makes it suitable for a wide range of applications, from robotics to custom mechanical systems.
1x Pololu 20.4:1 Metal Gearmotor 25Dx65L mm LP 12V w/ 48 CPR Encoder
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
United Kingdom consumers exercising their statutory Right of Cancellation are subject to different conditions. See the Statutory Right of Cancellation.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorisation (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A £100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables * — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tyres, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odour-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly * — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps * — Final sale only, due to licensing restrictions.
Clearance Items * — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items * — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfil a customer request.
* United-Kingdom consumers retain their statutory Right of Cancellation on these items. Its exercise is subject to the conditions and exclusions set out in the Statutory Right of Cancellation, and any reimbursement may be reduced to reflect a loss in value resulting from handling beyond inspection.
How to Request a Return Authorisation (RA)
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
