BASED ON CLAMPING METHOD All Platforms, All Workpieces Small in Size – Giant in Performance COMPANY PROFILE OK-VISE FIXTURING CONCEPT A wide selection of WORKHOLDING information as well as In the late 1970s Finnish entrepreneur and inventor Olli Kytölä ( “ok” ) bought The OK-VISE Fixturing Concept features a range of components that are suit- TODAY the latest updates about his first numerically controlled machining centers, but he was not happy with able for clamping different workpiece types, sizes and materials on all types of our products are easily obtained When productivity needs to the workholding solutions that were available then. workholding platforms and machining centers. from our website at improve, we recommend focusing While fastening the washing line to the brick wall of his house, he started www.ok-vise.com not only on machine tool or cut- to study the screw anchor that he was using - the rest is part of workholding ting tool properties like feed rates history. Stop modules S and spindle speeds. When you invest in modern fix- Clamp modules C Actuator (bolt/cylinder) turing concepts, in many cases radical improvements in production efficiency, flexibility and product Workpiece quality are much easier and more eco nomical to realize than putting money into the machine tool itself. Side guide G Forget old-school machine vises Today, the OK-VISE clamping method is known worldwide, and has been and strap clamps. complemented with further components which form the OK-VISE Fixturing concept. Riser block / Paraller P In addition to the most reliable clamping method on the market, OK-VISE Multi-Rail base now also offers easier and faster setup change. All systems in the OK-VISE FIXTURING CONCEPT include the following modules: OK-VISE LOW-PROFILE CLAMPS FIXTURE PLATES • Clamp modules based on OK-VISE low-profile clamp. AND PLATFORMS Olli Kytölä’s original invention is still the core of our product range. This • Stop modules. Clamp presses the workpiece against stop modules, unique workholding solution is designed to meet the demands of the modern creating either friction or form closure to hold the workpiece while We also offer platforms like tooling Hold-down principle metalworking, plastics, aerospace and electronics industries. machining. columns, trunnion units (rps), zero- • Side guides. These enable easy loading of workpieces. point positioning system (ok-lock) • Riser blocks / parallels. These are used to lift up the workpiece from and fixture plates. fixture base. All modules of the OK-VISE Fixturing Concept are reusable. Therefore, life cycle cost of OK-VISE modules is low so using OK-VISE is a step towards sustainable production. Our Blank System is a system for building DEDICATED FIXTURING (work- piece-specific fixturing). Normally only one setup of one workpiece can be WEDGEMAN clamped with these fixtures. SELECTION TOOL A second option for fixturing is to use a GENERIC-PURPOSE workholding system. A generic purpose system easily adapts to various workpiece sizes, To find the most suitable fixturing and the components of these systems can be reused and simply reconfigured system for your needs, OK-VISE for a variety of applications and workpieces. has designed a selection tool, Most fixturing cases can be built using both of these concepts. Wedgeman. 2 OK-VISE CLAMPING METHOD OK-VISE CLAMPING METHOD 3 LOW-PROFILE CLAMPS OK-VISE CLAMP ACTUATION The OK-VISE clamping method is both an effective and time-saving solution Low-profile clamps can be actuated either manually ( picture ) or automatically. because it allows full utilization of the fixturing platform. It also allows free On both sides of the clamp a stop module ( or similar functionality ) is needed. tool access to the workpiece, is free of play and possesses extreme clamping With this setup, one or two workpieces can be clamped using one clamp, force in a small space. simply the place of the stopper module accordingly. Efficient use of the machinable area leads to savings in tool changes, cre- ates less operator interventions and results ultimately in extended cycle times while cutting down machine stop times. Low-profile clamps do not require a lot of space when compared to tradi- tional machine vises and the variety of jaw types on offer makes the clamp suitable for a wide range of machining applications. Fixed Workpiece Workpiece Fixed stop stop OK-VISE CLAMPING METHOD OK-VISE low-profile clamps function on the principle that when tightened In most common clamp models the wedge prevents the jaw from lifting up down they expand, simultaneously pressing the workpieces against the while clamping and machining ( “hold-down” ). Please note that this standard guide and preventing any possibility of play. These clamps are designed property of OK-VISE is called pull-down by some suppliers. to fit between the workpieces and take very little space on the fastening In addition to holding the workpiece in place, there are also pull-down base. Small in size, yet possessing an excellent clamping force up to 150 kN, clamps that generate pull-down force, pressing workpieces onto the fixture these clamps guarantee a holding capacity which clearly exceeds the load base. imposed by machining forces. Small workpiece OK-VISE CLAMPING METHOD Dual direction clamping SOME TYPICAL INSTALLATIONS Single directional clamping Long or large workpiece A B D F 4 OK-VISE LOW-PROFILE CLAMPS OK-VISE LOW-PROFILE CLAMPS 5 SMOOTH JAWS ( -S ) SERRATED JAWS ( - or -R ) TUNGSTEN CARBIDE COATING ( -D ) JAW COMBINATIONS FORM JAWS When no marks on the workpieces General-purpose clamp for your work- Offers the same friction as a standard All these jaw types can be combined To make a form closure for the workpiece we can also machine various types of are allowed, smooth jaws are used. shop. Serration creates high friction, serrated jaw but leaves less visual with each other into a clamp or stop special jaws. These jaws have V-slots to clamp disks and rods. The can be “hori- Hardness 52 HRC which ensures reliable clamping in any marks on the workpiece. Industrial module. In most cases both jaws of zontally” ( H ), “vertically” ( V ) or both crossed ( C ). To get a higher accuracy of circumstances. Hardness 52 HRC diamond coating can also be used the clamp ( or stopper ) are same fixturing, we recommend building the form closure to the stopper in most cases. for the same purpose. type, like -S, -T, -G. We also offer clamps with two different jaws like -TS or -SG There are new jaw types coming every now and then. Please check www.ok-vise.com for newest updates. GRIP MODELS ( -G ) MACHINABLE JAWS ( +3, +5 or -M ) PULL-DOWN MODELS STAINLESS STEEL MODEL ( -SS ) ECONOMY MODELS ( -O ) As a rule of thumb, a workpiece is When the friction offered by serrated Single-wedge clamps are also avail- In most common clamp models, the The stainless-steel model is designed These models meet the demands held in a given direction by force jaws is not enough for your applica- able with extended jaws and can be wedge prevents the jaw from lifting to meet the demands of wire EDM of workholding when ultra-precision closure or form closure. tion, grip jaws can be used. Please machined to suit the geometry of the up while clamping and machining applications. This model only contains and high clamping force are not nec- In low-profile clamp jaws, as notice that the jaw penetrates into workpiece. The smallest model can ( “hold-down” ), whereas “pull-down” parts made of high-quality stain- essary. They are made of the same well as in stop module jaws some the work piece, leaving some marks. be machined up to 3 mm and the models create additional force to less-steel. raw material as our other models. Only friction is needed to get enough larger ones up to 5 mm. Hardness pull the work piece towards the fix- the bottom of the jaw is ground. Our grip against side- and upward 32 HRC ture base. smallest series is only available as the forces ( force closure) A fixture economy model ( AK2-VT-SO ). based on “form closure” can be made by using machinable jaws, machining additional pieces or suitable installation of stoppers. application ADDITIONAL PIECE MODELS ( -T ) SELF-ADJUSTABLE MODELS ( -B or -E ) INCH MODELS ( -VTI,-WTI ) CLAMP ACCESSORIES Additional piece models have machined female threading (M5) for socket These clamps have a self-adjustable D-series clamps are also designed Several accessories can be utilized with OK-VISE clamps. head screws on the side of the jaw, making it quick and easy to use various ball pressure screw inserted into for the half-inch bolt. The center hole Take a look at the expanding range of accessories at additional pieces which can also be machined into irregular shapes. the clamp jaw. The ball at the end of the inch-series wedge is wider in www.ok-vise.com/low-profile-clamps/accessories ADDITIONAL PIECES is made of steel, allowing the ball order to fit the half-inch socket head There are several sizes of additional pieces available, mostly made from alu- to self-adjust up to 9 degrees. This screw. minum but also from steel. makes clamping irregular-shaped parts and castings more flexible. (option) 6 OK-VISE LOW-PROFILE CLAMPS OK-VISE LOW-PROFILE CLAMPS 7 25 kN (2,5 tons) OK-VISE BK2-VT clamp 25Typical kN (2,5 machine tons) vise A CORE COMPONENT OF ANY MODERN WORKHOLDING SYSTEM SMALL IN SIZE – GIANT IN PERFORMANCE The OK-VISE low-profile clamp is also the core of OK-VISE FIXTURING CONCEPT. Low-profile clamps do not require as much space as traditional machine Low-profile clamps adapt optimally to any workholding platform.