Low-profile Clamp is the core component of OK-VISE Fixturing Concept.
OK-VISE low-profile clamps expand when they are tightened down, simultaneously pressing the workpieces against the guide and preventing their movement. They are designed to take up very little space on the fastening base. Small in size, yet with an excellent clamping force of up to 150 kN, these clamps guarantee a holding capacity that clearly exceeds the load of machining forces. Fastening with only one bolt ensures quick set-up times.
Our low-profile clamps work just as well on single machines as in large Flexible Manufacturing Systems. In most straightforward applications, the only additional investment needed are the fixed stoppers.
OK-VISE clamps are a reliable basic component of any workholding and fixturing system.
OK-VISE low-profile clamps come in four different sizes (A, B, D, F) for metric bolts (M5, M8, M12, M16), while the D-Series Inch Model is made for a half-inch bolt.
D / inch
|Bolt size (metric)||M5||M8||M12||M16|
|Imperial bolt size||3/16"||5/16"||1/2"||5/8"|
|Force up to (kN)||10||25||90||90||150|
|Force up to (lbs)||2 200||5 600||20 000||20 000||33 000|
|AMin...AMax (m Metric bolt sizem, compared to optimum)||-2.9...+ 2.5||-1.9...+3.0||-3.3...+5.2||-4.9...3.3|
|Bolt offset (mm)||2 x 0.7||2 x 1.2||2 x 1.1||2 x 1.7|
In B-series clamp the maximum clamping force is 25 kN which corresponds the force in a typical machine vise!
It is the most popular size today, followed by D-size which may be easier to handle manually and also the more popular in automated solutions.
The manual clamping is normally applied using an allen key with torque guage, however a power tool can also be utilised for convenience.
When actuated with a bolt the models with ground surfaces have a high accuracy response between torque and the clamp force
The precision-ground surfaces of OK-VISE Low-profile clamps quarantee consistantly accutate clamping force.
We have attached the torque-force graph to enable the most suitable clamping force & torque selection.
x = torque ( Nm), y = force ( kN )
The workpieces will he held by force or form closure. Depending of the workpiece form, material and parameters of machining process, always on optimal jaw type can be chosen.
+3 stands for machinable model in B-series, +5 in D-series
Self-aligning jaws available in B- and D-series only
G = knive edge, G1 = one hard steel pin, G2 = two pins, G3 = 3 pins
Please notice, that in clamps (as well as in most stopper modules) two different jaw types can be combined.
Other clamp properties
In addition to above mentioned clamp sizes and various jaw types, OK-VISE clamp superior designs differ from its competition in a number of important ways
Where standard model single-wedge clamps always keep workpieces steadily in place, not allowing
upward or downward movement, pull-down clamps also generate pull-down action and press workpieces towards the fixture base.
Stainless steel model
Originally designed for EDM applications, stainless steel clamp is used today in many harsh environments like welding appliations
Economy models (-O)
Some of our customers prefer our economy-series, which works sufficiently well in applications where absolute repeatability, high clamp accuracy and extremely high pressing forces are not necessary.
In economy models, only the bottom of the jaw is ground.
Our smallest series is only available as the economy model (AK2-VT-SO).
D-series inch models (-VTI, -WTI)
You can fasten the clamps with bolts of both metric and imperial dimensions for A-, B- and F-size clamps.
For D-size clamps, there are separate models to be used with an imperial half-inch bolt.
The center holes of inch-series wedges are wider in order to fit the half-inch socket head screw.
Low-profile clamp type summary
Following clamp types have two jaws which are both same type (exept self-aligning models).
D / inch
|Serrated basic version||BK2-VT||DK2-VT||DK2-VTI||FK2-VT|
|Smooth basic version||BK2-VT-S||DK2-VT-S||DK2-VTI-S||FK2-VT-S|
|Grip jaw models||BK2-VT-Gn||DK2-VT-Gn||DK2-VTI-Gn||FK2-VT-Gn|
|Models with machinable jaws||BK2-VT+3||DK2-VT+5||DK2-VTI+5||FK2-VT+5|
|Machined cross V models||BK2-VT-C||DK2-VT-C||DK2-VTI-C||FK2-VT-C|
|Additional piece models||BK2-VT-T||DK2-VT-T||DK2-VTI-T||FK2-VT+5|
|Self-aligning model, two jaws||BK2-VT-E||DK2-VT-E||DK2-VTI-E||FK2-VT-E|
|Single-wedge pull-down, serrated||BK2-VT-PD||DK2-VT-PD||DK2-VTI-PD||FK2-VTI-PD|
|Double-wedge pull-down, serrated||DK2-WT||DK2-WTI||FK2-WT|
|Double-wedge pull-down, smooth||DK2-WT-S||DK2-WTI-S||FK2-WT-S|
|Stainless steel model||BK2-VT-SS|
|Economy-series, serrated jaws||BK2-VT-O|
|Economy-series, smooth jaws||AK2-VT-SO||BK2-VT-SO|
Normally the end of the code is describing the jaw type, for example -T stands for a model with two additional pieces.
Self-aligning models (-B) have two types of jaws, smooth and serrated.
Accessories and spare parts
There are plenty of accessories available for Low-profile clamps, like bolts, protection plates and components to prevent the clamp from rotating while clamping.
Also, components of the clamp are available as spare parts.