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External Dimension Tolerance (µm)
In principle, the table below excludes the ends of products in the 20 mm to 30 mm range (unshaded area) and end of products at 50 mm (shaded area), and tolerances of circularity for h7 grinding products and h9 drawn products is within 30% and the tolerance for cylindrical products is within 50%.
However, lower tolerance ranges and cylindricity of ferrite drawn stainless steel are excluded.
Dimension
category		 1.0～3.0 3.01～6.0 6.01～10.0 10.01～18.0 18.01～30.0 30.01～50.0
JIS Upper
limit		 Lower
limit		 Upper
limit		 Lower
limit		 Upper
limit		 Lower
limit		 Upper
limit		 Lower
limit		 Upper
limit		 Lower
limit		 Upper
limit		 Lower
limit
h5 +0 -4 +0 -5 +0 -6 Please inquire
h6 +0 -6 +0 -8 +0 -9
h7 +0 -10 +0 -12 +0 -15 +0 -18 +0 -21 +0 -25
h8 +0 -14 +0 -18 +0 -22 +0 -27 +0 -33 +0 -39
h9 +0 -25 +0 -30 +0 -36 +0 -43 +0 -52 +0 -62
h10 +0 -40 +0 -48 +0 -58 +0 -70 +0 -84 +0 -100

* Please inquire concerning h4 tolerances and dimensions without an indication of tolerance.

Product link (mm)
　 Nominal length Length tolerance*
Drawn products 2,000～4,000 +20，-0
Grinding products 2,000～4,000 +20，-0

* Please inquire concerning lanes and length tolerances other than those indicated above.

Roundness precision
　 　 Free cutting steel Stainless steel
Drawn products Grinding products Drawn products Grinding products
Standard specification products L=1,000 Max0.6 Max0.5 Max0.8 Max0.7
Standard shaft specifications L=1,000 Max0.4 Max0.3 Max0.6 Max0.5
L=400 Max0.08 Max0.06 Max0.15 Max0.1
High precision shaft specifications Please inquire concerning high-precision shaft products
Service Roughness
  Dimensions (mm) Rz (10-point average roughness)* Ry (maximum roughness)*
Grinding products φ1.0～φ20.0 2.5 or less 3.2 or less

Drawn products

 φ2.0～φ6.0 5.0 or less (reference value) －
φ6.01～φ10.0 7.0 or less (reference value)） －
φ10.01～φ20.0 10.0 or less (reference value) －

* Surface roughness is based on JIS B0601-1994, the former standard prior to revision.

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