Pacific Scientific


Pacific Scientific

SR3658-2255-7-56B Image 1


The SR3658-2255-7-56B is a high-performance, Continuous Duty DC motor in the PMDC Motors series by Pacific Scientific. Constructed from lightweight, durable materials, this model operates with an efficacious speed of 1,800 RPM. Its key features include a 1HP power rating, a 4.5A current rating, and a 180VDC current rating. Manufactured with a 56B type NEMA frame size, this model offers broad-ranging application possibilities for various sectors including but not limited to: robotics, pharmaceutical manufacturing, oil and gas, printing and converting. The motor's sturdy construction ensures reliability and high performance, even in challenging environments like space, submarines, surgical settings, and oil & gas metrology and drilling. This functionality is further enhanced by patented anti-cogging magnets, enabling smooth operation even at low speeds, and boasts high overcurrent capacity. The model integrates a dynamic braking system that eliminates demagnetization risks. On the technical side, the SR3658-2255-7-56B displays a NEMA C face TENV non-vented configuration, combined with a sturdy, fused commutator and standard large sealed bearings. Its removable-base enclosure accommodates customization based on specific applications. Completing the design is a polyester-impregnated armature that provides high mechanical and electrical integrity. Overall, the SR3658-2255-7-56B is an exceptional part of Pacific Scientific's impressive lineup of industrial-grade motors. It's designed for seamless integration and guaranteed performance, living up to the high standards associated with Pacific Scientific products.

SR3658-2255-7-56B by Pacific Scientific is a motor in the PMDC Series. The SR3658-2255-7-56B features a Voltage (DC) of 180 and a Current (Amps) of 4.5. This Permanent Magnet DC Motor also has a RPM of 1800, a Factory Assigned Enclosure and a H.P. of 1.

Revision Part #:

SR3658 2255 7 56BSR36582255756B
Manufacturer Pacific Scientific
Product Type Continuous Duty DC Motor
Model SR3658-2255-7-56B
Speed 1800 RPM
Power Rating 1HP
Current Rating 4.5A
Voltage 180VDC
Enclosure 56B type NEMA frame size
Construction Rugged, featuring patented anti-cogging magnets

Distribution Cache Shipping Info and Options

Shipping Carriers: Here at Distribution Cache we ship using UPS, FedEx, DHL, or TNT. In most cases we get very competitive rates based on our volume and will be happy quote shipping cost to your location upon request. We also know that many customers would prefer to ship collect on their own account numbers and welcome this option.

Shipping Blind: We recognize that many of our customers intend to re-sell the product to their end user. We respect our customer’s relationships with their clients and offer blind shipping as an option to ensure that the package arrives in the most clandestine way possible.

Shipping Process: We take pride in the way we package your order and spare no cost in making sure that it arrives safely at your facility. In the case of new parts, we are always sure to package the factory box inside another larger box for safe transit. For reconditioned parts we often use Distribution Cache customized packaging that is specially made to protect the products from the bumps and falls present during shipment.


Shipping Options:

Next Day Air Early AM - This service is the fastest overnight delivery option available. For most locations the package will be guaranteed by 8:30AM.

Next Day Air – This service guarantees delivery by 10:30AM and is the most frequently used option for overnight shipments.

Next Day Air Saver – This cost saving overnight alternative guarantees delivery by 3PM the next day.

2nd Day Air – For domestic shipments that would take 3-5 days if shipped via Ground, sometimes having the order in 2 days is a great way to go

Ground – Ground is the most inexpensive shipping option provided. Please ask if we are doing a “free domestic ground” shipping promotion on your order. We often provide free ground shipping on larger orders.


Emergency Courier – At times we can help work with a courier service to get the part to your facility during downtimes scenarios. We prefer that the customer sets up the courier but we can be there to make sure the product is handed off to the driver. Please give us a call to see if this is an option on your order.

Please Note: Products listed as “ships today” can ship same-day if an order is placed before 4PM. For larger drives and motors we ask that notification for same-day shipments be provided by 2PM at the latest. For any products listed as “ships in 3-5 days”, please give us a call to see if this can be expedited.