Sirui K-40X Ball Head

BH #SISUK40X • MFR #K40X
Sirui
Sirui K-40X Ball Head
Key Features
  • Knobs for Pan, Tilt & Tension
  • 77 lb Load Capacity
  • Quick-Release Plate with Anti-Twist Pins
  • Arca-Style Clamp for Quick Release
The Sirui K-40X Ball Head is an extremely sturdy head with control knobs for pan, tilt, and tension, plus an Arca-style clamp for the included quick-release plate. The pan, tilt, and quick-release knobs are all separate, while the tension knob is integrated into the ball-locking (tilt) knob. The head tilts 90° for portrait orientation. There's also a video pin on the plate to keep camcorders from twisting.
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$179.90
$164.90 after a $15.00 mail-in rebate. Offer ends September 30, 2021
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Sirui K-40X Overview

The Sirui K-40X Ball Head is an extremely sturdy head with control knobs for pan, tilt, and tension, plus an Arca-style clamp for the included quick-release plate. The pan, tilt, and quick-release knobs are all separate, while the tension knob is integrated into the ball-locking (tilt) knob. The head tilts 90° for portrait orientation. There's also a video pin on the plate to keep camcorders from twisting.

The interior ball locking of the K-40X head has a sphere tolerance of 0.01mm, and it's equipped with an orientation-memory locking dial. This helps yield a high load capacity of 77 lb. The quick-release clamp features a secondary release button that prevents any inadvertent disengagement of the camera/plate from the clamp, thereby adding to the head's overall security and stability. The Arca-style platform conforms to standard sizes, so you can use compatible plates from other manufacturers.

The three control knobs allow a photographer to exercise extremely fine control over the orientation of the camera, whether it's a DSLR, 35mm, medium-format camera, or even a camcorder. Pan, for instance, can be adjusted while the tilt stays locked, enabling precise movement that's measurable – there are degree markers at the panning base for panoramic photography.

The K-40X is CNC-machined from an aircraft-grade aluminum alloy and anodized with an oxidation treatment that ensures a durable, high-quality finish.

Arca-style quick-release clamp with secondary safety lock
Two bubble levels (horizontal and vertical) on the quick-release platform ensure that your framing hews to the horizon in either portrait or landscape orientation
The friction-control knob, integrated into the ball-locking knob, allows the operator to adjust the resistance of the ball's movement
Quick-release plate is aluminum alloy with a rubberized surface
Stainless steel camera screw

Sirui K-40X Specs

General
Head TypeBall Head
Base Mount3/8"-16 Thread
Camera Mounting Screw1/4"-20 Male
Quick Release Plate TypeArca-Type
Load Capacity77 lb / 35 kg
Number of Bubble Levels2
Friction ControlYes
Independent Pan LockYes
Pan & Tilt Range
Panning Range360°
Physical
Ball Sphere Diameter2.13" / 55 mm
DimensionsH: 4.9" / H: 125.0 mm
Weight1.5 lb / 0.7 kg
Packaging Info
Package Weight2.095 lb
Box Dimensions (LxWxH)6.1 x 4.9 x 3.85"
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Which is better, this or the similarly priced ...

Which is better, this or the similarly priced Xpro Ball head from Manfrotto?
Asked by: Rick
Both are very good heads with smooth movement and more than adequate locking capabilities.
Answered by: Rob
Date published: 2020-06-25

Will this head support large camera and lens ...

Will this head support large camera and lens combos including a Nikon D500 and Tamron 150-600mm without slippage?
Asked by: Richard
The Sirui K-40X Ball Head, B&H # SISUK40X, has a 77 lb load capacity. The combined weight of the Nikon D500 DSLR camera and the Tamron SP 150-600mm f/5-6.3 Di VC USD G2 for Nikon F is 6.27 lbs. When tightened properly and mounting the camera/lens combination on the lens' tripod collar for proper center of balance, there should not be any slipping when using the aforementioned setup on the Sirui K-40X Ball Head.
Answered by: Manzell
Date published: 2018-12-16

question

Is the Sirui K-40x Ball Head compatible with Manfrotto quick release plates?
Asked by: Anonymous
The Sirui K-40x Ball Head is not compatible with Manfrotto quick release plates, no. This head uses Arca-Swiss style plates.
Answered by: Christina S.
Date published: 2018-08-28

What is the dimension of the base of the head?

What is the dimension of the base of the head?
Asked by: Douglas
The base of this tripod head is 3 inches in diameter.
Answered by: Zachariah
Date published: 2021-01-28

question

is this ball head compatible with the Sirui monopods?
Asked by: Anonymous
Yes. This ballhead will be compatible with Sirui monopods. The head features a 3/8 connection, which is standard size for both monopods and tripods. If you ever need to use the smaller 1/4-20 thread size, there are bushing adapters available. General Brand Tripod Reducer Bushing 3/8 to 1/4 -20B&H # GBRB ? Mfr # NPTRBThis scenario is less common, but having this part handy would cover you for almost all available support systems.
Answered by: Chris L.
Date published: 2018-08-28

question

Is the pan/tilt knob any larger in diameter on the K-40 than the K-20?
Asked by: Timothy D.
The pan knobs on both are the same at 15mm diameter. The main locking knob on the K-40x is approx. 36mm diameter, and 32mm diameter on the K-20X.
Answered by: Eric P.
Date published: 2018-08-28

Does the 77lb load capacity only apply when it's ...

Does the 77lb load capacity only apply when it's vertical? For ex, if I wanted to use a 20lb cinema camera and lock it at an angle, would it slip?
Asked by: gabriel
The 77LB only applies when the ball head is in a center/horizontal position. We do not recommend using such heavy equipment off-center. Other brands make stronger ball heads but they are not really designed to be used in such a way. Although they may work at the beginning, the ball will slowly start shifting
Answered by: llinelva
Date published: 2021-04-09

Does anyone know the width of the base? The only ...

Does anyone know the width of the base? The only spec listed is for the height.
Asked by: Darrin
The base is approximately 65mm.
Answered by: Rob
Date published: 2020-07-22
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