When flattening the back of a chisel.
Tool grade flat granite surface.
Choose grade a and aa surface plates in 4 6 8 10 and 12 thicknesses and various surface dimensions.
A surface plate is a solid flat plate used as the main horizontal reference plane for precision inspection marking out layout and tooling setup.
Precision surface plates a0105201description01.
Hhip 4401 0013 black granite surface plate grade b ledge 0 24 length x 18 w 407 09 new hhip granite surface plate grade b ledge 0 4401 0011 12 x 9 x 3.
Aside from actually being flat it is much more substantial than glass does not slide on my bench during use and being two inches thick it is much easier to let the tool hang off the edge e g.
Ttc 12 x 18 x 3 thick grade b no ledge black granite surface plate starrett 81803 crystal pink granite toolmakers flat 12 length 8 width 2 thickness 0 0001 overall tolerance add to cart.
A most manufacturers use asme b89 3 7 2013 or federal specification ggg p 463c granite surface plates as a basis for their specifications.
These handy flats are small precision surface plates that are ideal for many inspection and checking uses throughout the plant.
Offered in crystal pink or black granite starrett toolmakers flats are 12 long x 8 wide x 2 thick 300 x 200 x 50mm and finished to an overall tolerance of 0001 0 0025mm.
Starrett precision granite surface plates provide a reference plane for work inspection and for work layout their high degree of flatness overall quality and workmanship also make them ideal bases for mounting sophisticated mechanical.
That surface i tried two was ridiculously warped compared to this plate.
The surface plate is often used as the baseline for all measurements to a workpiece therefore one primary surface is finished extremely flat with tolerances below 11 5 μm or 0 0115 mm per 2960 mm for a grade 0 plate.
For serving as a backing plate for straight razor servicing the plate is a universe better than what i ve seen a youtube expert advise which was a granite tile from home depot for 6.
If it s as flat as the map claimed this is an amazing tool and value.
Grade a inspection plates work fine for general quality control.
2 is there an industry standard for surface plate accuracy.
Various sized grade b tool room surface plates measure 4 6 8 and 10 thick.
Use granite angle plates to clamp and hold work in a vertical position.
