Liquid-cooled frameless spindle motors, from 1MB140 through 1MB375.
Match the complete nameplate, including every suffix. Ask Litco for current photos of the unit being quoted.
Scrollable family inventory
The list below is a starting point, not the warehouse limit. Call with the full suffix from the tag for current condition, configuration and price.
1MB140 is the smallest documented 1MB frame, with B, D, F and H lengths, 4A or 4B windings and configuration-specific speed and torque ratings.
View 1MB140 series details →1MB160 is documented in six frame lengths with 4A through 4D winding choices, multiple rotor bores and a broad spindle-speed range.
View 1MB160 series details →1MB200 spans C, D, E and H lengths, several 4-series windings, two documented rotor bores and configurations reaching 20000 rpm.
View 1MB200 series details →1MB240 is documented in B, F and H lengths with 4A or 4B windings, 1000 rpm rated speed and 72 or 87 mm rotor bores.
View 1MB240 series details →1MB241 is documented in D and H lengths with 6-series windings, 112 or 202 Nm rated torque and several rotor-bore choices.
View 1MB241 series details →1MB242 is a focused N-length, 4B-winding configuration documented at 185 Nm, 1700 rpm and 33 kW with a 71 mm rotor bore.
View 1MB242 series details →1MB270 is documented as a C-length, 4B-winding frame rated at 190 Nm, 1500 rpm and 30 kW with two rotor-bore choices.
View 1MB270 series details →1MB310 is documented in B, D and F lengths with multiple 6-series windings, 260–480 Nm torque and six rotor-bore choices.
View 1MB310 series details →1MB375 is the largest documented 1MB frame, with B and D lengths, 6B or 6D windings and ratings reaching 875 Nm.
View 1MB375 series details →Family overview
Rexroth 1MB motors are liquid-cooled asynchronous frameless spindle-motor kits used as direct drives in turning, milling, grinding, transfer-line, processing-center and special-purpose machines. The motor components are a separately identified 1MS stator and 1MR rotor; the machine builder supplies and integrates the spindle housing, bearings and motor feedback. Match both complete component codes, frame length, winding, rotor bore, cooling, feedback and connected drive before substitution.
Open the preserved Bosch Rexroth 1MB Project Planning Manual R911264277 ↗The motor and its connected drive must be considered together. Similar housings can carry different windings, feedback devices, shafts, brakes and connector directions.
For a failed motor, include the axis symptoms, shaft condition and any contamination or overheating evidence. That helps Litco compare a repair evaluation with a configured replacement.
Helpful photos: the nameplate, complete unit, connections and shaft or cabinet context.
Call to check stock. Send the complete 1MB type code so Litco can confirm configuration, condition and availability.
Call to check stock, condition and lead time. Your part number carries into the form.