山东北联机械股份有限公司——冷拔无缝管、冷拔无缝钢管、冷拔管、珩磨管、缸筒、缸体及总成、气缸、活塞杆、液压油缸

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　Variety

Processing	Cylinder diameter	Length	Straightness	Dimension accuracy	Bore roughness
Cold drawing	30-325	≤12M	0.3-1.0/1000	H8-H10	0.8-1.6
Honing	40-700	≤12M		H8-H9	0.4-0.8
Rolling-pressing	40-400	≤7M		H8	0.4

The dynamical performances

Iron type		Cold drawing pipe	Cutting pipe
20	Tensile strength　　N/mm²	≥510	≥390
20	Elongation　　　　%	≥5	≥20
45	Tensile strength　　N/mm²	≥647	≥590
45	Elongation　　　　%	≥4	≥4
16Mn	Tensile strength　　N/mm²	≥640
16Mn	Elongation　　　　%	≥10
20Mn2	Tensile strength　　N/mm²	≥672
20Mn2	Elongation　　　　%	≥7.5
27SiMn	Tensile strength　　N/mm²	≥840
27SiMn	Elongation　　　　%	≥7.5

Size common difference

Inner diameter size	Inner diameter deviation					Thickness deviation
Inner diameter size	H7	H8	H9	H10	H11	Thickness deviation
30	+0.021 0	+0.033 0	+0.052 0	+0.084 0	+0.130 0	±5%
>30-50	+0.025 0	+0.039 0	+0.062 0	+0.100 0	+0.160 0
>50-80	+0.030 0	+0.046 0	+0.074 0	+0.120 0	+0.190 0
>80-120	+0.035 0	+0.054 0	+0.087 0	+0.140 0	+0.220 0
>120-180	+0.040 0	+0.063 0	+0.100 0	+0.160 0	+0.250 0
>180-250	+0.046 0	+0.072 0	+0.115 0	+0.185 0	+0.290 0
>250-315	+0.052 0	+0.081 0	+0.130 0	+0.210 0	+0.320 0
>315-700	+0.057 0	+0.089 0	+0.140 0	+0.230 0	+0.360 0

　Main specification（Connecting rod）

Specification

Ø6

Ø8

Ø10

Ø12

Ø16

Ø20

Ø22

Ø25

Ø28

Ø30

Ø32

Ø35

Specification

Ø36

Ø38

Ø40

Ø45

Ø50

Ø55

Ø60

Ø65

Ø70

Ø75

Ø80

Ø85

Specification

Ø90

Ø100

Ø105

Ø110

Ø120

Ø125

Ø130

Ø140

Ø150

Ø160

Ø170

Ø180

　Major technique parameter（Connecting rod）

Specification	Ø6-Ø12	Ø16-Ø25	Ø30-Ø50	Ø55-Ø110	Ø105-Ø108
Length	800-2000	800-3000	800-5000	1000-7000	1000-9000
Surface roughness	0.4-0.1
Surface treated 　　hardness	HRC60 Above	Straightness		0.15/100mm
Roundness 　　tolerance	GB1184 9Grade	Chromium plating thickness		0.02-0.06
Length tolerance	GB1800 IT7Grade	Material		45#、2Crl3
Quenched	HB241-267
Product to be 　　ordered	Surface not treated ,chromium plated or Ni-P plated

copy right reserved: Shandong Beilian Machinery Co., Ltd
Add:No.3688 north east road, economic development zone
Tel:086-0536-3521032　ICP record : 08000224
Technical support: Qingzhou Business Net