Operating Instructions Motors and Brakemotors Type BM (G) Brakes - Installation

Oct 24, 2026

Upload by SANS

Operating instructions for SEW-Eurodrive motors and brakemotors, Type BM (G) Brakes, covering shipment checks, installation requirements, and precautions. It specifies ambient limits, cooling air flow, access needs, mounting on a flat vibration-damping structure with tight flatness tolerances, and correct shaft coupling alignment. It also describes safe coupling installation (heating guidance), maximum offset limits, long-term storage with insulation resistance testing, severe duty “-KS” features, and electrical connection responsibilities.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages7

Reading Time18 min

AccessFree to download

General

Installation

Long Term Storage

Severe Duty Units

Electrical Connection

Brake Coil Resistance

Operating Instructions Motors and Brakemotors Type BM (G) Brakes document sheet date 09 793 67 US 1 (7) B / 06.06.00 General Every SEW-Eurodrive motor is thoroughly tested, checked, and properly packed prior to shipment. However, please check immediately upon arrival for shortage of parts or transit damage. Note the damage or shortage on the freight bill of lading and file a claim with the carrier. Also, notify SEW-Eurodrive of the shortage or damage. Installation For motors mounted integrally to a gear unit, please refer to the Operating Instructions for Gearmotors and Gear Reducers for proper installation of the drive. The drive installation site should be selected to ensure: • Ambient temperatures below 40˚C (104˚F) . • Unimpeded flow of air to the motor and variable speed units. • Accessibility to gear unit, oil plugs. • Adequate space for the removal of the brakemotor fanguard for brake adjustment and maintenance. The drive unit should be mounted on a flat, vibration damping, and torsionally rigid structure. The flatness tolerance of the supporting surface should not exceed: For motor size 180 and smaller—0.004 inch For motor size above 180—0.008 inch Do not hammer on the shafts to install couplings, sheaves, etc. Hammering can cause brinelling of the bearings and a reduction in bearing life. We recommend heating the components to approximately 175 F and sliding them on. This will reduce possible damage to the bearings. In addition, there is a metric tapped hole in the center of the motor shaft that can be utilized with a tool to press on or remove the coupling, sheaves, etc. The motor shaft diameters are metric and have tolerances as listed in the SEW-Eurodrive catalogs. Shaft couplings should be properly aligned to prevent vibration, coupling wear and premature failure of the shaft bearings. Maximum Parallel Offset—0.003 inch Maximum Angular Offset—0.030˚ To prevent the output shaft and bearings from being subjected to excessive loads, the maximum overhung loads, as shown in SEW-Eurodrive catalogs, should not be exceeded. Please consult our engineering department if the load may exceed the recommended figure given or where there are combined radial and axial loads. In such cases, the exact operating conditions must be stated including speed, direction of rotation, position, magnitude and direction of the external radial and axial loads being applied. Long Term Storage If the motor must be stored for a long period of time without operating, the motor must be stored in a dry, protected area, and in the mounting position indicated on the unit nameplate. In order to ensure that the motor has not been damaged by moisture after a prolonged storage, the insulation resistance should be checked. An insulation tester with a measurement voltage of at least 500V (e.g. magneto generator) should be used for this purpose. The insulation resistance is sufficient if it has an ohmic value of at least 1000 x VN (e.g. at VN = 230VAC: Rinsul > 23000 ohms = 0.23M ohms) . If the measured value is smaller, the motor should be dried before use (for example, with hot air up to a maximum of 90˚C or by resistance heating with an auxiliary AC voltage of 10% of VN via an insolating transformer) . Care should betaken to ensure that the motor is heated with not more than 20% of its rated current and that the rise in temperature is not more than 90˚C. The drying procedure can be stopped when the insulation resistance has reached 500000 = 0. 5M ohms. Severe Duty Units Severe Duty Units are indicated with the letters “-KS”at the end of the motor type on the motor nameplate. Severe Duty units include drain holes in the motor end belts and conduit box at the lowest points allowing condensation to drain out of the motor. CAUTION! The drain holes are installed for the mounting position listed on the gearbox nameplate. Installing a unit in a mounting position other than what is shown on the nameplate will reposi

FAQs

What should be checked immediately after receiving the motors and brakemotors?

Check for shortage of parts or transit damage upon arrival. Record damage or shortage on the freight bill of lading, file a claim with the carrier, and notify SEW-Eurodrive.

What conditions are required at the installation site for the drive?

Select a site with ambient temperatures below 40°C, ensure unimpeded airflow to the motor and variable speed units, maintain accessibility to the gear unit and oil plugs, and provide adequate space for brake adjustment and maintenance.

How is long-term storage protection ensured for the motor?

Store the motor in a dry, protected area in the indicated mounting position, then check insulation resistance using an insulation tester with at least 500V. If the value is below the specified limit, dry the motor before use using controlled heating or resistance heating.

Oct 24, 2026

Upload by SANS