How to Measure a Wiper Arm

How to Measure Wiper Arm Length

The red arrows in these drawings illustrate the measurements you’ll need to make in order to get the correct wiper arm length.

You might be surprised to learn that the actual length of a wiper arm is longer than its designated length. That’s because the industry standard approach is to designate wipe arm length as the straight line distance from the center of the pivot shaft to the center of connection to the wiper blade  The bridge width between the driver and idler of a pantograph arm is measured “center to center” too.

But what about when there’s a bend in the arm?  Pretty much the same advice applies when there’s a bend in the wiper arm.  To determine the arms length, simply measure the straight line distance from the center of the pivot to the wiper blade connection.

Measuring length of a bent radial arm
So, just think “center to center” whenever you measure a wiper arm and you’ll do fine.

How to Avoid Slow Windshield Wipers on Rail Applications

The nominally 12V and 24V wiper motors that power boat, truck and tractor wiper systems really operate at charging voltages of 13.5V and 27V, respectively.

But many locomotive generating systems operate at 74V and light rail often runs on 110V then use an inverter to step down high-voltage.  If you use a setpoint such as 24V or 12V, you’ll end up with wipers that operate too slowly. Rather, you should use setpoints of either 27V or 13.5V to ensure proper wiper speed.

When you’re vetting windshield wiper systems, remember that at AM Equipment we’re proud of how we collaborate with our customers to develop the wiper system solution that solves their problems.  We’d like to cure your windshield wiper system headaches too.  Give us a call at 541-327-1546 for more information.

How to Describe a Wiper System’s Park Position

The term Park Position means where the wipers come to rest when the system is turned off.  Many years ago the industry used right hand park and left hand park to indicate the position of a wiper arm at rest.  Unfortunately, the left-right designation sometimes resulted in confusion.  That’s because the direction a wiper arm moved to the same resting or park position depended on whether the assembly was mounted above the window with the arms pointing down or below the window with the arms pointing up (see the following figures).

So to make things consistent and more obvious, we always designate the wiper system’s park position by indicating the arm travels clockwise (CW ) or the arm travels counter clockwise (CCW)  to the park position.


radial-park-positions

Radial Park Positions

pantograph-park-positions

Pantograph Park Positions

REMEMBER! CW and CCW, like all wiper system direction designations, are referenced from the outside of the vehicle looking in.

When you’re talking about windshield wiper system park positions you won’t go wrong using CW or CCW to indicate the direction the arm travels to park.

You can find a glossary and answers to other frequently asked questions in our Technical Library.

Approved Wiper Arm & Blade Length Combinations for the 2D Series Wiper System

Important Information for 90° Sweep Angle Applications

IMPORTANT!

This bulletin describes wiper arm and blade length combinations that are approved for use with AM Equipment series 235, 2D systems operating at a 90° sweep angle.

Exceeding approved arm / blade length combinations will result in drive gear failure and voids the factory warranty.

Notice: Use ONLY Standard Duty wiper arms with a 90° sweep angle Below Windshield Mounting Configuration.

Below Mount Tech Bulletin 2D Arm-Blade

  • Arm length must not exceed 30”
  • Blade length must not exceed 32”

NOTE: Heavy duty arms are not approved for use on below windshield mounting configurations.

An Above Windshield Mounting Configuration can be used with Standard or Heavy Duty arms.

Above Mount Tech Bulletin 2D Arm-Blade

  • Arm length must not exceed 36”
  • Blade length must not exceed 36”

If you have any questions about the appropriate configuration of AM Equipment’s 2D Wiper System, please Contact AM Equipment

 

Set Screw

AM Equipment’s New Set-Screw Wiper Arm Mount Solves a Common Problem

AM Equipment has just released a new wiper arm mounting.  The new set-screw mounting’s configuration, including an extra-long skirt, protects the pivot shaft raises the wiper arm allowing clearance of the window gasket.

Wiper arm maintenance is simplified too.  A single “set screw” torqued to 40 inch pounds securely mounts the arm/blade combination to the pivot shaft.  Quick removal and installation with a single hex wrench means wiper arm maintenance is lot easier.

The new set-screw mounting socket allows us to build non-corrosive wiper arms that fit any 212 Series and 208 Series, and all WWF type marine wiper motors with ½ inch drums.

AM Equipment can build marine wiper arms with any of the blade and wiper arm characteristics our products are known for, including:

  • Stainless steel tension springs
  • Larger stainless steel flat wire construction
  • Simplified idler arm brackets
  • Available with either hook slot or saddle blade attachment
  • Choice of framed or frameless wiper blades

Where Can You Find Wiper Arms to Replace ANCO Products?

ANCO Wiper Arms are already hard to come by.  And with the closing of their plant in Michigan City, Indiana at the end of August, the situation isn’t likely to improve any time soon.  In fact, ANCO quit taking orders last February 15th and will cease production at the end of August 2013.  That decision may have left you in a bind.

So where can you find a supplier of quality, durable wiper arms?

While ANCO is going through this relocation you might want to look into AM Equipment as a backup supplier.

AM Equipment Wiper Arms Replace ANCO Products

AM Equipment has a line of standard duty wiper arms with the identical form, fit and function to fill gaps in your inventory caused by the interruption in production during ANCO’s move to Juarez, Mexico.

AM Equipment’s standard duty wiper arms are made with stainless steel and composite materials that offer superior corrosion resistance and durability.  These wiper arms are competitively priced, rivaling most non-stainless wiper arms.

    • 10mm x 4mm stainless steel extension for superior strength and corrosion resistance
    • 300 series stainless steel spring is custom calibrated for each application
    • UV stabilized composite channel
    • Internally routed washer hose is hidden from view and reduces snagging (optional)
    • Integrated high volume nozzle distributes fluid in an even fan-spray pattern (optional)
When you need a new source for those ANCO wiper arms that you can’t get, AM Equipment’s line of standard duty wiper arms makes a lot of sense.
We are located in Jefferson, Oregon and we assemble all of our wiper products right here.  You can depend on us.  We aren’t going anywhere.

Use the following tables to find the AM Equipment standard duty wiper arms with the identical form, fit, and function of the ANCO wiper arms you’re having a hard time finding.

Table: AM Equipment Product Numbers and Corresponding ANCO Products

Radial Wiper Arms
ANCO
Part Number
AM Equipment
Part Number
(Dry)
AM Equipment
Part Number
(Wet)
Description Size Attachment
49-14R 352-0555 352-0556 Radial Wiper Arm, DFS w/Tapered Knurl 14″ Saddle
49-16R 352-0559 352-0560 Radial Wiper Arm, DFS w/Tapered Knurl 16″ Saddle
49-18R 352-0563 352-0564 Radial Wiper Arm, DFS w/Tapered Knurl 18″ Saddle
49-20R 352-0567 352-0568 Radial Wiper Arm, DFS w/Tapered Knurl 20″ Saddle
49-22R
(OEM 13805-50)
352-0571 352-0572 Radial Wiper Arm, DFS w/Tapered Knurl 22″ Saddle
49-24R
(OEM13806-50)
352-0575 352-0576 Radial Wiper Arm, DFS w/Tapered Knurl 24″ Saddle
49-26R 352-0579 352-0580 Radial Wiper Arm, DFS w/Tapered Knurl 26″ Saddle
49-28R
(OEM13808-50)
352-0583 352-0584 Radial Wiper Arm, DFS w/Tapered Knurl 28″ Saddle
Pantograph Wiper Arms
ANCO
Part Number
AM Equipment
Part Number
(Dry)
AM Equipment
Part Number
(Wet)
Description Size Attachment
49-14PN
(OEM 13901-50)
352-0498 352-0482 Pantograph Wiper Arm, DFS, knurl, 1.25″ 14″ Saddle
49-16PN 352-0500 352-0484 Pantograph Wiper Arm, DFS, knurl, 1.25″ 16″ Saddle
49-18PN 352-0502 352-0486 Pantograph Wiper Arm, DFS, knurl, 1.25″ 18″ Saddle
49-20PN
(OEM 13904-90)
352-0504 352-0488 Pantograph Wiper Arm, DFS, knurl, 1.25″ 20″ Saddle
49-22PN
(OEM 13905-90)
352-0506 352-0490 Pantograph Wiper Arm, DFS, knurl, 1.25″ 22″ Saddle
49-24R
(OEM 13906-90)
352-0508 352-0492 Pantograph Wiper Arm, DFS, knurl, 1.25″ 24″ Saddle
(OEM 13907-90) 352-0510 352-0494 Pantograph Wiper Arm, DFS, knurl, 1.25″ 26″ Saddle
(OEM 13908-90) 352-0512 352-0496 Pantograph Wiper Arm, DFS, knurl, 1.25″ 28″ Saddle
Pantograph Wiper Arms (Hookslot)
(OEM 13890-90) 352-0096 Not available Pantograph Wiper Arm, 1/2″ Drum, 1.75″ 20″ Hookslot