RAM® Add-A-Ball™ Adapter for RAM® Tough-Clamp™

Part#: RAP-B-397BU
UPC: 793442944253

Kit Components
$9.99

hardware included:

(1) #10-24 x 1.25" Machine Screws
(1) #10-24 Nyloc Nut

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:

0.08 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.

Print

Documents

Knowledge Base: Ball Sizes
Q&A
Questions & Answers loading...
RAM® Add-A-Ball™ Adapter for RAM® Tough-Clamp™
$9.99

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.