RAM Mounts
RAM Mounts RAM-B-138U Double Ball Drill-Down Mount with Diamond Plate with Medium Arm
Best secure mounting solution for rugged vehicle device installation.
This RAM Mounts drill-down solution offers unparalleled adjustability for your devices. Featuring a powder-coated, marine-grade aluminum construction, it ensures durability in demanding environments. The ball and socket system provides excellent shock and vibration damping, allowing for near-infinite positioning to achieve the perfect viewing or operating angle. The diamond plate includes a universal AMPS hole pattern, making it compatible with a wide range of device holders. This mount is ideal for securing phones, action cameras, and light-duty tablets.
$36.49
Owner Satisfaction
4.6
/ 5
Category Rank
174
/ 354
#174 in GPS Mounts
Price vs Category Average
-26%
Below average
Product Dimensions
5
/ Overall Height: "
Who it's for
- Professionals working in demanding, harsh outdoor environments
- Off-road adventurers needing rock-solid device stability
- Drivers requiring precise, customizable screen viewing angles
Who should skip it
- Renters or owners avoiding permanent vehicle modifications
- Shoppers expecting an all-inclusive, ready-to-install kit
- Users mounting heavy tablets or large professional equipment
Performance breakdown
Structural Durability
Marine-grade aluminum construction withstands the harshest outdoor and industrial environments.
Positioning Versatility
The ball and socket system offers near-infinite angles for perfect visibility.
Vibration Damping
Rubberized ball design effectively isolates devices from road and engine shock.
Installation Complexity
Requires permanent drilling, which demands careful planning and tool proficiency.
System Compatibility
Standard AMPS hole pattern integrates seamlessly with most third-party device cradles.
Load Stability
Rock-solid performance for phones and cameras within the two-pound weight limit.
Key Specs
Product Dimensions
Overall Height: 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
Round Plate: 2.5" Diameter, Diamond Plate: 2.43" x 1.31"
Ball Size
B Size (1")
Weight Capacity
Standard Use: 2 lbs, Heavy-Duty Use: 1 lb
Materials
Marine-grade aluminum
Weight
0.52 lb
Features
- Drill-down mounting solution
- Diamond plate with 2-hole AMPS pattern
- Ball and socket technology for near-infinite adjustability
- Durable construction for demanding environments
- Provides shock and vibration damping
- Modular design with interchangeable components
- Lifetime warranty
What customers say
The RAM Mounts RAM B 138U earns high marks for its rugged construction and dependable performance. Owners value the rock solid stability provided by the double ball system which keeps devices secure during heavy use. The drill down installation offers a permanent and sturdy foundation that users find superior to temporary alternatives. Its simple design prioritizes function and longevity making it a trusted choice for demanding setups. Most reviews emphasize that this mount is a worthwhile investment for anyone seeking a durable and high quality mounting solution that stands the test of time.
Know before you buy
The diamond plate features a universal AMPS hole pattern, making it compatible with a wide variety of RAM device cradles, phone holders, and action camera mounts that utilize the same standard.
Yes, this is a drill-down mounting solution. You will need to drill holes into your chosen surface to securely fasten the base plate using the appropriate hardware for your specific mounting location.
This mount is rated for a weight capacity of up to 2 lbs for standard use, or 1 lb for heavy-duty applications involving significant vibration or impact.
Yes, the B-size ball and socket system allows for near-infinite adjustability. You can loosen the knob on the arm to pivot, tilt, and rotate your device to the exact viewing angle you need, then tighten it to lock it in place.
Absolutely. It is constructed from powder-coated, marine-grade aluminum, which is specifically designed to resist corrosion and withstand the harsh conditions found in marine or outdoor settings.
Yes, the modular design uses the standard B-size (1") ball system. This allows you to swap out the arm or the mounting plate with other RAM components if your setup needs change in the future.
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