Industries
Industrial replacement parts for the plastics industry
At MR Accesorios Industriales we supply components for extruders, injection molding machines, blow molding machines and winders. With more than 80 years in the market, we offer deep groove ball bearings and cylindrical roller bearings, timing belts, pulleys and V-belts, linear motion systems and couplings. We support the plastics industry with technical advice and solutions to keep production running.
What the plastics industry uses
Plastics industry machines operate at high speeds, require dimensional precision and use synchronous drives. Extruders require screws that rotate continuously under radial and axial loads; injection molding machines require repetitive cycles and precise linear movements; blow molding machines and winders need synchronization to avoid variations in thickness or winding. The environment usually has high temperatures and the presence of dust or vapors, which demands robust and well-lubricated components.
Cylindrical roller bearings are used for screws and shafts in extruders; they support high radial loads and allow high speeds. On lighter-duty shafts or in motors, deep groove ball bearings are a versatile option. Synchronous drives are handled with timing belts, which ensure an exact ratio between shafts, and with pulleys and V-belts for less precise transmissions. Linear motion systems are used in injection molding machine guides and handling robots. Couplings absorb misalignments and transmit torque between motor and gearbox.
When selecting a bearing, radial and axial load, rotational speed, operating temperature and lubricant type are considered. For timing belts, pitch, width and number of teeth are evaluated according to power and speed. Mounting must be clean, with appropriate tools and without impacts that damage the raceways. Lubrication must be as specified by the manufacturer and renewed according to the maintenance schedule. Careful mounting and correct lubrication extend the service life of components.
At MR we work with you to find the right component. You can request a quote by part number or by application: tell us what machine you have, what motion it performs and what demands it handles. We advise you on choosing the best option from our catalog. We ship nationwide and answer inquiries via WhatsApp. With more than 80 years of experience, we support the plastics industry with reliable solutions.
Frequently asked questions
Which bearings are best for an extruder screw?
Cylindrical roller bearings are recommended for extruder screws; they support high radial loads and high speeds. In cases of combined loads, they can be paired with thrust bearings. Mounting must ensure precise alignment to avoid premature wear.
How do I choose a timing belt for an injection molding machine?
To select a timing belt, consider the power to be transmitted, rotational speed, center distance and available space. Pitch and width are defined according to load. It is essential to verify correct tension and pulley alignment to prevent tooth jumping.
What coupling do I need to connect a motor to a gearbox?
The coupling depends on torque, speed and the degree of shaft misalignment. Flexible couplings absorb slight misalignments and vibration. For high-precision drives, disc or gear couplings can be used. Contact us with your application details for guidance.
Request a quote by part number or application
Send us the manufacturer part number, or tell us the machine and mounting point, and we'll tell you what solves it.
Page for MR Accesorios Industriales. The subcategories link to the full catalog, without brand distinction.