AM Equipment Wiper Arm
Pivot Shaft Compatibility
AM Equipment manufactures wiper arms that are compatible with several different types of pivot shafts. Please consult the figures following this table to for a visual comparison of pivot shaft types.
|Pivot Shaft||Standard Duty Arms||Commercial Duty Arms||Heavy Duty Arms|
|1/2″ Drum, lever retained||Available||No||No|
|1/2″ Drum, set screw retained||Available||No||No|
Pivot Shafts Used on AM Equipment Wiper Systems
Why So Many Different Pivot Shafts?
Tapered knurl, half inch drum, M6 DIN… Why are there so many different wiper arm to pivot shaft interfaces?
The short answer is that over the years different equipment manufacturers have developed their own standards for wiper arms, including a variety of pivot shaft interfaces. Looking deeper into the situation suggest why.
As vehicles and vessels have come to support larger and larger glass area to be cleaned, wiper arm and pivot shaft design has evolved. Because the pivot shaft transfers power from the wiper motor to the wiper arm, more powerful motors and longer wiper arms have driven the need to engineer more effective shaft to arm interfaces. Yet, there are still plenty of applications where legacy interfaces are used because they are the most cost effective..
- Drum interfaces were popular in 1950s and 1960s automobiles and are still found on many smaller wiper systems, including boats, electric carts and many other small glass applications.
- The tapered knurl is commonly found on many off road vehicles, and some medium glass applications.
- DIN standards originated in Europe. It’s the latest standard that has been accepted around the world. M6 DIN and M8 DIN pivot shafts are found on all types of vehicles and industrial cabins.