2575 NW Graham Circle - Troutdale - OR - 97060 - Phone: 503-661-7700 - Fax: 503-669-9107

Machining Standard

Dimensional Tolerance

Nominal Dimension

Dimension Tolerance

0.5

~

6

±0.1
  ~     30 ±0.2
  ~   120 ±0.3
  ~   315 ±0.5
  ~ 1000 ±0.8
  ~  2000 ±1.2
Unit: mm
Tolerance as per JIS B 0405-1991 to be applied, unless otherwise stated in working drawing.

Surface Roughness

Finishing

Notation

Machining Surface 
roughness

Rmax

Ra

Finishing Method

JIS B 0601

 

Rmax

Ra

ÑÑÑÑ

3s 0.75a

Honing Lappinger

0.8s 0.2a

ÑÑÑ

12s 3.0a

Grinder, Lathe

Milling cutter

6.3a 1.6a

ÑÑ

35s 8.75a

Milling cutter, Lathe

25s 6.3a

Ñ

100s 25.0a   100s 25.0a

~

No prescript No prescript Band Saw No prescript No prescript
Graphite materials have more porous structure than metallic materials, and show a greater surface roughness. Therefore, the surface roughness will show a little greater than metals'.  
Manufacturer may change specification without notice.
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