RAM® Track Ball™ Mount with 1/4"-20 Action Camera Adapter

Part #: RAP-B-366-153-354-TRA1U
UPC: 793442955167
Ball Size: B
Arm Length: Medium
Price: $37.49

Overview

The RAP-B-366-153-354-TRA1 consists of a Track Ball™ base, composite double socket arm, and a 1" ball connected to a round plate with 1/4"-20 camera thread. This steel camera thread will connect to any standard female thread found on camcorders, digital cameras and POV cameras. This kit is compatible with virtually any track system including the RAM Tough-Track™.

Specifications

hardware included	(1) Friction Washer (1) 1/4"-20 x 7/8" T-Bolt
t bolt dimensions	.48" x .95"
socket to socket length	3"
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	0.34 lb

Kit Components

RAP-B-366U RAM® Ball Adapter with 1/4"-20 Threaded Stud for Action Cameras - B Size
RAP-B-201U RAM® Composite Double Socket Arm - B Size Medium
RAP-B-354U-TRA1 RAM® Track Ball™ Base with T-Bolt Attachment - B Size

Compatibility

Cameras: that contain 1/4"-20 Female Threaded Hole

Full compatibility list: rammount.com/products/rap-b-366-153-354-tra1u

RAM® Track Ball™ Mount with 1/4"-20 Action Camera Adapter

Part#: RAP-B-366-153-354-TRA1U

UPC: 793442955167

$37.49

Options

9" Modular Aluminum Black RAM® Tough-Track™

$24.99

Overview

hardware included:

(1) Friction Washer
(1) 1/4"-20 x 7/8" T-Bolt

t bolt dimensions:

.48" x .95"

socket to socket length:

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:

0.34 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

Drawing File: RAM® Track-Ball™ Base

QUESTIONS & ANSWERS

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Is the bottom a 1/4-20 female thread

Yes! The threaded hole on the bottom of the trackball is 1/4"-20 and the included T-bolt is 1/4"-20 x 7/8"

RAM® Track Ball™ Mount with 1/4"-20 Action Camera Adapter

$37.49

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
A	0.56" (14.3 mm)	0.5 lb	Action cameras and other ultra-light devices
B — this product	1" (25.4 mm)	2 lbs	Phones, GPS units, and small tablets — the most common size
C	1.5" (38.1 mm)	4 lbs	Large tablets, fish finders, and rougher rides
D	2.25" (57.2 mm)	6 lbs	Rugged tablets, laptops, and heavy equipment
E	3.38" (85.9 mm)	15 lbs	Large 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.

Short, medium, and long double socket arms compared side by side. This product uses a Medium arm — Arm lengths

The double socket arm clamps over two balls — one on the base and one on your device holder. Arm length sets your reach: short arms are the most stable, while longer arms give you more freedom to position the device.

RAM Mounts overall and socket-to-socket arm lengths by ball size
Arm Length	Measurement	A Size	B Size — this product's ball size	C Size	D Size	E Size
Short	Overall Length	N/A	2.42"	3.56"	5.69"	5.69"
Short	Socket-to-Socket Length	N/A	1.75"	2.5"	4.66"	4.66"
Medium	Overall Length	2.42"	3.73" — this product	5.69"	8.44"	12.63"
Medium	Socket-to-Socket Length	1.75"	3"	4.66"	6.88"	9.88"
Long	Overall Length	3.56"	6"	9.13"	12.98"	N/A
Long	Socket-to-Socket Length	3.12"	5.31"	8"	11.41"	N/A