RAM® Drill-Down Mount with Spring-Loaded Phone Holder

Part#: RAM-B-138-UN5U
UPC: 793442935145

Kit Components

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$70.99

Overview

The RAM universal spring loading clamping cradle includes side clamps with rubber bumpers that adjust accordingly to the width of your device, securing your device in the cradle. The feet at the base of the cradle can pivot and slide, creating an opening for larger devices to be attached. A release button, located on the bottom right side of the cradle, allows for quick release of your device. Also included are two threaded inserts and a set of two nuts/bolts to connect the cradle to any of the RAM compatible mounts. Primary mounting applications for the clamping cradle is in LOW VIBRATION environments including cars, trucks and fleet vehicles. The RAM-B-138-UN5U also includes a medium length B-size arm and a 2.5" diameter round plate with universal AMPS hole pattern.

hardware included:

Assembly Hardware

holder dimensions:

Width Range: 1.75" - 3.5"

socket to socket length:

3"

hole pattern:

4-Hole AMPS: 1.181" x 1.496"
3-Hole 120-Degree: 1.812" Diameter

plate size:

2.5" Diameter

ball size:

B Size (1")

weight capacity:

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

materials:

Marine-grade aluminum
High strength composite

packaging type:

Poly Bag

Weight:

0.26 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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RAM® Drill-Down Mount with Spring-Loaded Phone Holder
$70.99

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

Holder Accessories
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Arm Accessories
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Base Accessories
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