When it comes to aircraft pulleys, there are many different varities. However, understanding aircraft pulleys is a bit more streamlined. Military Specification pulleys (Mil-Spec) are all manufactured to MIL-DTL-7034. When selecting the proper Mil-Spec Pulley, there are four variations to consider: MIL-DTL-7034/1, MIL-DTL-7034/2, MIL-DTL-7034/3 & MIL-DTL-7034/4. All four callouts have unique features. These features include: outer diameter (OD), cable compatibility, allowable loads, and bore size. At eSheaves, we want to provide a blog that looks at the specific differences between the Mil-Spec Pulley choices to ensure they buy the suitable product for their aircraft cable system. Below are the key differences between the Mil-Spec Pulley categories.
MIL-DTL-7034/1 – Cross-Reference MS20219 (superseded AN219) is a pulley product used for secondary control in Aircraft. MIL-DTL-7034/1 pulleys:
MIL-DTL-7034/2 – Cross-Reference MS20220 (superseded AN220) are pulleys used for flight control in Aircraft. MIL-DTL-7034/2 pulley specs:
MIL-DTL-7034/3 – Cross-Reference MS20221: are heavy-duty pulleys used for secondary control in Aircraft. MIL-DTL-7034/3 pulleys feature:
MIL-DTL-7034/4 – Cross-Reference MS24566 (superseded AN210B) are anti-friction bearing pulleys used for control In Aircraft. MIL-DTL-7034/4 pulleys have:
Despite all Military Specification (Mil-Spec) pulleys being manufactured to MIL-DTL-7034, we've shown that there are four unique variations to consider when selecting the right product for your aircraft cable system. MIL-DTL-7034/1, MIL-DTL-7034/2, MIL-DTL-7034/3 & MIL-DTL-7034/4. Choosing a pulley for the proper OD, cable size, and loads is simplified by understanding the key differences between the four Mil-Spec Pulley categories.
If you want to learn more about Mil-Spec Pulleys, visit our product page here. Alternatively, if you have any questions, we can help! Reach out to us by email through sales@esheaves.com, by phone at 800-321-5667 or by filling out a Quotation for our Military Specification Pulleys here.