September 30, 2016

Hejnar PHOTO F163b a Larger Flat Mount Optimized QR Clamp - Preview

Hejnar PHOTO F163b Quick Release Clamp

Further to the release of the New Hejnar PHOTO F162b Flat Mount Optimized Quick Release Clamp Preview quite recently, another Hejnar classic the F63 is transformed into a thicker version the F163b
with a special thinner mono-block screw knob.
All for the sake of mounting the clamp flat on a surface, while being able to manipulate the knob quite easily still.

Once again the F163b QR Clamp is a result of user demand wishing a clamp with longer jaws than the F162b which serves the same function. So it can be mounted on a flat surface without the usual interference of the screw-knob with that surface.

The clamp

Manufacturer Specification:
Jaw Length:3.25" (82.55 mm)
Weight:172 gr (6.1 oz)
Center Countersunk hole:1 x Threaded 3/8"-16
Side Countersunk holes:2 x Threaded 1/4"-20 - set 45 mm apart. 
Captive Screw Knob:Stops at maximum opening
Material:6061-T6 Aluminium
Color:Black hard coat anodized
Hardware:Stainless Steel
Made in :USA

Similarly, the top side is identical to the F63b QR clamp with decimal scales on both jaws, the 2.6 mm deep safety stop relief grooves, the counter sunk and 3/8"-16 threaded center hole and the two standard side mounting screws which are also counter sank and 1/4"-20 threaded. Just a reminder that the side holes are placed 45 mm apart on the F63 and F163 instead of 30 mm on the F62 and F162.

The classic by now, tongue in pocket design of the moving jaw guides is also identical, to guaranty a long term operation by preventing dirt and grit entering the clamp interior.

Hejnar PHOTO F163b Quick Release Clamp Top view

Needless to say that the bottom side is identical as well, with the standard Hejnar dowel pin holes and the usual grooves and holes helping to maintain the weight low without affecting the clamp strength.

Hejnar PHOTO F163b Quick Release Clamp bottom view

Somehow in order to achieve the flat mounting required the increase of the Clamp thickness, but with little increase in weight, actually only 37 gr compared to the F63.
The second required element is the thinner, block screw-knob, that is now narrower than the thickness of the clamp. In this way, it will not interfere with any surface laying flat above or bellow the clamp.

In other words, the user can either clamp a large format camera plate that extends a lot out of the QR clamp perimeter; or mount the clamp flash on a large board or video camera rig, without the screw knob come in contact with either surfaces.

Hejnar PHOTO F163b Quick Release Clamp screw-knob hex socket detail

Furthermore, in tight spaces where the screw-knob cannot be manipulated by hand, the knob is also equipped with a 5 mm hex socket, allowing it to be turned via an Allen hex key.

As standard with all Hejnar Photo products the appropriate screws and tools are included. An 1/4"-20 flat head hex-socket mounting screw and the corresponding Allen hex key accompany the F163b.

Hejnar PHOTO F163b QR Clamp plus screw and hex key

Arca Swiss® compatibility is a long time standard for Hejnar Photo products extended to this QR clamp as well.

I hope you found the information useful, thank you for viewing.
Photos by courtesy of Hejnar Photo ©2016 Chris Hejnar

Price & Availability:
Current price for the F163B clamp is US$ 75.00 (+Shipping where applicable). The F163b is only available on preorder from the Hejnar Photo online Store, in a first come first served base.

If you are interested in the product, do check the Recommended Sellers page for a valid Hejnar Photo discount coupon before ordering.

Referenced Articles:

New Hejnar PHOTO F162b Flat Mount Optimized Quick Release Clamp Preview

Relevant articles:
Hejnar Photo Updated F62Ab Quick Release Clamp Review
Hejnar Photo F010A and F012 Quick Release Clamps

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