INA HF0812-KF freewheel de agujas

INA HF0812-KF belongs to freewheel de agujas, part of our Power transmission range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for HF0812-KF and any equivalents.

A needle roller freewheel from the INA HF-KF line permits rotation in a single direction while blocking movement the other way. Maintenance teams use it to stop backdriving, to serve as an anti-return device, or to couple and uncouple shafts based on which way they turn. Because the needle arrangement is compact, the unit fits into confined mounting spaces and handles moderate torque levels.

Reading the code takes only a moment once you know the pattern. The letters HF point to the needle roller freewheel family. The four digits that follow describe the standard size: the leading pair is the bore in millimeters, the trailing pair is the width in millimeters. A -KF suffix marks a design variant inside the line. So HF0612-KF carries a 6 mm bore and a 12 mm width, while HF1012-KF keeps the same 12 mm width with a 10 mm bore. With that logic you can size a replacement without opening a catalog.

Typical installations include anti-return systems, one-way clutches, conveyors, elevators, automatic doors and other transmission assemblies where a shaft must spin freely one way and hold firm the other. The same behavior shows up in safety mechanisms that keep a load or a linear motion from running backward. Industries such as metallurgy, food processing, textiles and machine tool building rely on this type of component.

Before ordering, confirm four things: shaft diameter, the width you have room for, the torque the application transmits, and the rotational speed. The needles run directly on the shaft, so the shaft needs the right tolerance and a hardened surface. Use the lubricant called for by the sealing type and the operating conditions, and consider extra protection where dust or moisture is present. Shaft and housing must line up correctly; misalignment introduces side loads and speeds up wear.

Interchange between manufacturers is often possible when dimensions and load capacity line up, though suffixes and tolerances are not always identical. To cross an INA unit to another make, set bore diameter, outside diameter, width and permissible torque side by side. You can search by dimensions or by the application itself.

Send the part number or the dimensions of your equipment by WhatsApp or email and our team will reply promptly with a quote. We can also suggest equivalents and advise on mounting, lubrication and upkeep.