Bal-tec™ Home All Vee Blocks
Part Number: VB-187-CPM. For balls from 3/16" (.1875", 4.76mm) through 1/4" (.25", 6.35mm).
Building a teeny tiny vee block for Kinematic applications presents some unusual challenges. The design chosen uses the well-proven cylindrical post-mounted vee block. The post is used to both locate and clamp the vee block in position. The cylindrical post is precision ground to .250 inches.
The flange adjacent to the post is ground flat and square to the post. The post is drilled and tapped for a 4-40 hold down screw. After precision grinding the flat prismatic faces of the tiny vee block, these faces are precision lapped. The vee block is constructed from a high chrome, high carbon, Martensitic stainless steel that is hardened to 58 HRC minimum. This ultra fine-grained material provides excellent repeatability with good fret resistance.
This very small size component will match balls from just under three sixteenth's (3/16" ) of an inch ( 4.8 mm ) to just over one quarter inch ( 1/4" ) ( 6.4 mm ) diameter. Our part number on this item is VB-187-CPM.
Cylindrical Post Mounted — Part Number: VB-375-CPM, For 5/16" ( 0.3125", 7.94 mm ) through 1/2" ( 0.50", 12.7 mm ) Balls
This device is designed to accept spheres from five sixteenths of an inch 5/16", 0.3125" ( 7.9 mm ), three eighths, 3/8", 0.375" of an inch ( 9.5 mm) is nominal, to one half of an inch, 1/2", 0.50" (12.7 mm) in diameter. It is our part number, VB-375-CPM.
The cylindrical mounting post is precision ground to three eighths (3/8") of an inch ( 0.375", 9.5 mm ) diameter, tolerance plus 0.0000 inches or minus 0.0005 inches (.013 mm). This post is one quarter of an inch( 1/4", 0.250", 6.35 mm ) long. The flat flange adjacent to the post is precision ground flat and square to the post. The included angle of this vee block is 90 degrees.
This device is designed for universal mounting from either the front or from behind. The major diameter of this Vee Block is three quarters (3/4") of an inch (19 mm). The flat faces of this device are precision ground with the face of the grinding wheel, not the periphery. The resulting crisscross pattern breaks up the lay of the surface texture to give this couple far superior repeatability.
There is a hole drilled through the center of the post that is tapped to accept a # 10-24 hexagon socket head cap screw, a threaded fastener. This allows the vee block to be clamped down solidly from the rear end. This same hole is counterbored from the front, which allows it to be clamped down from the front by a #6 hexagon socket head cap screw. This vee block is constructed from a very high chrome, high carbon, Martensitic stainless steel. This ultra fine-grained material is hardened to a 58 HRC minimum. These Vee Blocks are highly magnetic.
Part Number: VB-375-SM, For 5/16" (.3125", 7.94mm) through 1/2" (.500", 12.7mm) balls.
For 5/8" ( 0.625", 15.875 mm ) through 1" ( 25.4 mm ) Balls — Part Number: VB-75-SM
This component, also known as a Standard V Block, ( Part No. VB-75-SM, made from Hardened Stainless Steel ) is designed primarily for high load carrying kinematic couplings and precision tooling applications. The contact area between a sphere and the precision ground flat surfaces of the Vee block is greater than that between a sphere and two cylinders. This gives the Vee block a much higher load carrying capacity than the two cylinders.
This Vee block component is designed for flat surface mounting to the kinematic or tooling platform. The precision flat lapped base of this component is held in solid contact with the top surface of the platform by two cap screws. It can be clamped down from either the front or from the rear.
Two through holes are provided, one at each end of the Vee. They are tapped for #10 x 32 screws. Using these tapped holes, the Vee block can be pulled down solidly against the platform from behind. If front mounting is desired, the Vee block can be held solidly against the platform by two #6 round head screws. These screws will pass through the center of the same tapped holes but from the front surface.
There is a 1/2 inch diameter shallow counterbore in the flat base of this component. The remaining annular ring provides a very stable locating surface. This counterbore provides a recess that will hold adhesive if the component is glued down. These Vee blocks are made of very fine grained, high chrome, high carbon, stainless steel that is hardened to 58 HRC and ultra cold cycled for long term dimensional stability.
The 90 degree ground faces of the Vee block are tangent to any ball diameter from 5/8" ( 0.625 inch, 15.875 mm) to 1.00 inch (25.4 mm), with the ideal size being 3/4" ( 0.750", 19.05 mm).
Part No. VB-75-CPM, For 5/8" ( 0.625", 15.875 mm ) through 1.0" ( 25.4 mm ) Balls
This kinematic Vee Block component (also known as Cylindrical Boss Mounted Vee Block ) is designed for both high load carrying capacity and easy installation. Because the contact area between a sphere and the precision ground flat surfaces of the Vee block is greater than that between a sphere and two cylinders, this Vee block has a much higher load carrying capacity. Precise location of this component is achieved through a precision ground cylindrical post. The flange adjacent to the cylinder is also ground flat.
This design facilitates the accurate installation of this component without the use of precision machine tools. The desired mounting is simply scribed on the surface of one of the kinematic or tooling platforms with a compass. This circle is then divided into three equal cords and the intersections are center punched. The top and bottom platforms are clamped together. Three holes are then drilled and reamed, through both of the platforms. This can be done on a drill press or even with a hand drill. With the three .500 inch ( 12.7mm ) diameter holes now drilled through both platforms three of the cylindrical post mounted Vee blocks can be mounted on one platform, and three of the part number 75 B-T balls can be mounted on the other to form a perfect kinematic system.
These Vee blocks are made of very fine grained high chrome, high carbon, stainless steel that is hardened to 58 HRC and ultra cold cycled for long term dimensional stability. The 90 degree precision ground faces of the Vee block are tangent to any ball diameter from 5/8"(0.625 inch, 15.87mm) to 1.00 inch (25.4 mm), with the ideal size being 3/4" (0.750 inch, 19.05mm). To orient the Vee and to prevent any rotation, there is one 0.093 inch (2.3622 mm) diameter dowel pin hole machined through the outside edge of the flange.
These Vee blocks can be held in place from either the front or the rear. They can be solidly bolted down from the front surface by a #10 hexagon socket head cap screw. The head of this cap screw is recessed in a counterbore to avoid contact with the ball. For back surface installation, use a #1/4-20 hexagon socket head cap screw. The Vee can also be pulled down from behind by a 1/4 inch-20 bolt screwed into the threaded hole in the center of the cylindrical post.Warning: mysql_connect(): Access denied for user 'precism1_osc'@'localhost' (using password: YES) in /volume1/web/db_conn.php on line 4 Warning: mysql_query(): Access denied for user ''@'localhost' (using password: NO) in /volume1/web/All_Vee_Blocks.php on line 271 Warning: mysql_query(): A link to the server could not be established in /volume1/web/All_Vee_Blocks.php on line 271 SELECT Error: Access denied for user ''@'localhost' (using password: NO)