Language
The OEM Electric Motor SPB V-Belt Pulley is a cast iron V-groove pulley machined to the SPB belt section. It is produced to ISO 4138 and DIN 2211-3 and cast from EN-GJL-200 (UNI EN 1561), so the pulley can run at peripheral speeds up to 35 m/s without dynamic imbalance. Every unit is statically balanced before shipping, which is what makes the pulley suitable for direct coupling to an electric motor shaft rather than only to low-speed equipment.
Raydafon manufactures the OEM Electric Motor SPB V-Belt Pulley with the full SPZ, SPA, SPB and SPC groove range. Bore, keyway, groove number and hub profile are matched to the motor shaft and the driven machine at the time of order. OEM marking is available for equipment manufacturers. Standard lead time is 15 to 30 days from the Ningbo factory.
An OEM Electric Motor SPB V-Belt Pulley is a cast iron V-groove pulley designed to fit onto an electric motor shaft and drive a V-belt. The SPB groove section is one of four standard metric V-belt sections — SPZ, SPA, SPB, SPC — and sits in the middle of the range for power and speed. SPB covers a wide range of motor-driven drives in industrial machinery, agricultural equipment and mobile applications. The pulley is machined from EN-GJL-200 cast iron, which is standard for V-belt pulleys because the material combines good damping, machinability and wear resistance at the belt contact surface.
The pulley is produced to ISO 4138 and DIN 2211-3, so the groove profile and the pitch diameter match the international V-belt standard. This means an SPB belt from any manufacturer will sit correctly in the groove and deliver the expected service life. Every pulley is statically balanced before shipping, which allows direct mounting on the motor shaft at the maximum rated peripheral speed without causing bearing vibration in the motor.
The table below lists the material, standard and performance specification of the OEM Electric Motor SPB V-Belt Pulley. Bore, keyway, number of grooves and hub profile are confirmed against the motor shaft and the actual drive requirement at the time of order.
| Parameter | Value |
|---|---|
| Product Type | Cast iron V-groove V-belt pulley |
| Belt Section | SPB (also SPZ, SPA, SPC from same factory) |
| Belt Type | V-belt |
| Material | EN-GJL-200 grey cast iron (UNI EN 1561) |
| Manufacturing Standard | ISO 4138 and DIN 2211-3 |
| Balance | Statically balanced on every unit |
| Max Peripheral Speed | 35 m/s |
| Groove Number | 1 to 12 grooves depending on drive requirement |
| Bore Type | Finished bore with keyway or taper lock bush |
| Surface Finish | Machined groove, primed body, top coat available on request |
| Quality Certification | ISO 9001 |
| Applications | Electric motor drives, small diesel engine output, tractors, farm vehicles, mining equipment, textile machinery, packaging machinery, lathes, forging machines, air compressors, reducers, dynamos, cotton ginning machines |
The OEM Electric Motor SPB V-Belt Pulley is one product in a range that covers all four metric V-belt sections. The groove section defines the belt width and the minimum pulley diameter for a given motor power. The four sections below can be produced from the same factory to simplify a multi-section drive specification.
SPZ is the smallest metric V-belt section. Used on fractional horsepower motors, small machine tools and light-duty agricultural drives where a narrow belt is enough for the required power.
SPA covers light to medium industrial drives. Common on pumps, fans, blowers and mid-size machine tools running on standard electric motors up to around 75 kW.
SPB is the most common section for medium to heavy duty motor-driven equipment. This is the section specified on the product page for compressors, reducers, textile machinery and heavy packaging equipment.
SPC is the widest metric section and is used on the highest power drives: mining equipment, crushers, high-power compressors and heavy processing equipment where a large number of SPC belts transmit the load.
The OEM Electric Motor SPB V-Belt Pulley is used wherever a standard electric motor drives a piece of equipment over a moderate distance and requires a large speed reduction or a slight speed increase. The industries below are the ones most often quoted on a Raydafon enquiry.
To confirm the correct OEM Electric Motor SPB V-Belt Pulley and issue a quotation, Raydafon needs the five items below. For a straight replacement of an existing pulley, the original pulley code and the motor nameplate details are usually enough.
Send the five items below and Raydafon will confirm the pitch diameter, groove number, bore, keyway and lead time within one working day.
The OEM Electric Motor SPB V-Belt Pulley is used to mount on an electric motor shaft and drive a piece of equipment over a moderate distance using an SPB V-belt. It is the standard drive pulley on pumps, fans, compressors, reducers, textile machinery, packaging equipment and agricultural machinery.
SPZ, SPA, SPB and SPC are the four metric V-belt sections. SPZ is the smallest and is used for fractional horsepower drives. SPA covers light to medium industrial drives. SPB is the most common section for medium to heavy duty motor-driven equipment. SPC is the widest section and is used for high-power drives such as mining equipment and crushers. The correct section is determined by the belt that matches the motor power and drive geometry.
The OEM Electric Motor SPB V-Belt Pulley is cast from EN-GJL-200 grey cast iron (UNI EN 1561). This material is standard for V-belt pulleys because it provides good damping, easy machining of the groove profile and long wear life at the belt contact surface.
Static balancing corrects the mass distribution of the pulley so that the centre of gravity lies on the shaft axis. A statically balanced pulley runs without causing vibration in the motor bearings, which is why the OEM Electric Motor SPB V-Belt Pulley can be directly mounted on the motor shaft at peripheral speeds up to 35 m/s.
The pulley is suitable for peripheral speed up to 35 m/s. The peripheral speed is calculated from the pulley pitch diameter and the shaft speed. Where the required speed exceeds 35 m/s, contact Raydafon so a higher-speed or different pulley design can be proposed.
Yes. Send the motor shaft diameter and the required keyway standard (DIN 6885, JIS or ANSI) and Raydafon will produce the correct hub bore and keyway. Taper lock bush mounting is also available where the application requires it.
Yes. Raydafon produces the full SPZ, SPA, SPB and SPC range, so both the motor-side pulley and the driven-side pulley can be supplied as a matched set with the correct ratio between the two. Send the motor speed, the required driven speed and the centre distance between the two shafts.
Standard configurations ship in 15 to 30 days. Custom bore, keyway and groove number configurations are confirmed with the quotation. As an OEM manufacturer, Raydafon can supply from single units up to full production quantities. MOQ depends on the specific configuration and is confirmed when the specification is fixed.
Whether you are replacing a worn SPB pulley on an electric motor drive, specifying matched V-belt pulleys for a new pump or compressor package, or sourcing SPZ, SPA, SPB and SPC pulleys in volume for a distributor network, Raydafon can quote the OEM Electric Motor SPB V-Belt Pulley or a custom equivalent to your section, groove number, bore and keyway requirements. OEM and project quantities supplied directly from the Ningbo factory.
Address
Luotuo Industrial Area, Zhenhai District, Ningbo City, China
Tel
