RAM® Rotating Ball Adapter for Phone and Handheld Holders - B Size

Part#: RAP-B-351-4RU
UPC: 793442027178
$24.99

Overview

The RAM® Rotating Ball Adapter for Phone and Handheld Holders - B Size (RAP-B-351-4RU) allows your device holder to rotate between landscape and vertical orientations. This adapter is RAM® Compatible™, featuring one 4-hole AMPS and two 2-hole AMPS patterns found on all RAM® holders. Using the screw in the center of the ball, you can adjust the tension required to pivot the holder making it a versatile adapter capable of handling the most rugged conditions. Integrate this solution into your existing setup or complete the solution with a B size base, double socket arm, and device holder.

Features

  • Easily rotate devices without loosening your mounting system
  • Made of high-strength composite for durability and reliability in the most demanding environments
  • RAM® Compatible™; one 4-hole AMPS and two 2-hole AMPS patterns
  • Backed by a lifetime warranty

hole pattern:

4-Hole AMPS: 1.181" x 1.496"

plate size:

2.5" Diameter

ball size:

B Size (1")

weight capacity:

Standard Use: 2 lbs
Heavy-Duty Use: 1 lb

materials:

High strength composite

packaging type:

Poly Bag

Weight:

0.15 lb

Return Policy:

All products purchased from RAM® can be returned within 30 days with no restocking fee (return shipping not provided). See full return policy here.

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QUESTIONS & ANSWERS

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  • What is C size?

    Unfortunately, we do not have a C Size version of this component. If you'd like to rotate a device using a C Size base plate, you could use RAM-HOL-ROTO1U and RAM-202U.

  • What is "B" size?

    The term 'B size' refers to the ball size, which corresponds to our 1-inch ball.

  • Is this what I need to adapt Tab-Tite holder for my iPad Mini (A17)? I already have a clamp RAM system for my phone.

    Yes this adapter will work with your Tab-Tite™ system, as long as it contains B-size components (1" ball), as this component contains a 1" B-size ball.

RAM® Rotating Ball Adapter for Phone and Handheld Holders - B Size
$24.99

Size Guide

Ball sizes
  • A Size 0.56" ball
  • B Size — this product 1" ball
  • C Size 1.5" ball
  • D Size 2.25" ball
  • E Size 3.38" ball

Every RAM® mount is built around a rubber ball and socket system. The ball size sets how much weight the mount can carry. Match it to your device for smooth adjustment with a rock-solid hold.

RAM Mounts ball size specifications and typical uses
Size Ball Diameter Max Load* Best For
A0.56" (14.3 mm)0.5 lbAction cameras and other ultra-light devices
B — this product1" (25.4 mm)2 lbsPhones, GPS units, and small tablets — the most common size
C1.5" (38.1 mm)4 lbsLarge tablets, fish finders, and rougher rides
D2.25" (57.2 mm)6 lbsRugged tablets, laptops, and heavy equipment
E3.38" (85.9 mm)15 lbsLarge displays and demanding aviation or industrial use

*Approximate capacity for a standard ball with a mid-length arm. Shorter arms and steel-reinforced posts increase real-world capacity.

Reading part numbers

The letter after RAM tells you the ball size: RAM-B-166 uses a 1" B ball, while RAM-D-201 uses a 2.25" D ball. C size parts are the exception and carry no letter, so RAM-201U is a C size arm.

Add-on & Accessories

B Size Double Socket Arms
See All
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