Specifications

plunger cylinder honed steel tube
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plunger cylinder honed steel tube

1.Usually Description of honed tube for hydraulic  cylinder :

product name	honed tube for hydraulic cylinder
Standard	DIN 2391 EN10305  DIN17175
Wall Thickness	3-40mm
Out  Diameter	36-480mm
Material	ST 44  ST 52
Steel Grade	20# 45# 16Mn  ST 45 ST 52
Length	Length Length ≤ 500mm , +2mm   > 500mm ≤ 2000mm, +3mm   > 2000mm ≤ 5000mm, +5mm   > 2000mm ≤ 7000mm, +10mm
The end	Tube ends  Tube ends shall be cut nominally square to the axis and free from burs

2.Variety of  honed tube :

Processing form	I.D.mm	Length	Straightness	I.D.tolerance	I.D.Roughness(RA)
Cold-rolled	30-100	≤12M	0.3-1.0/1000	H8-H10	0.4-1.6um
Cold-drawn	30-250	≤12M		H8-H10	0.8-1.6um
Hone	40-500	≤12M		H8-H9	0.4-0.8um
SRB	50-250	≤9M		H8	0.1-0.4um

3. Tolerance of ID and WT of  honed tube:

Size of inside Diameter(mm)	ID Tolerance			Tolerance of wall thickness
30	+0.0330	+0.0520	+0.0840	<120mm(OD)              ±5% >120mm up to 210mm±7.5% >210mm                     ±10%
>30-50	+0.0390	+0.0620	+0.1000
>50-80	+0.0460	+0.0740	+0.1200
>80-120	+0.0540	+0.0870	+0.1400
>120-180	+0.0630	+0.1000	+0.1600
>180-250	+0.0720	+0.1150	+0.1850
>250-315	+0.0810	+0.1300	+0.2100
>315-400	+0.0890	+0.1400	+0.2300

 4.OD Tolerance of st52 honed tube:

Name	(Scope)mm	(GB Series)mm	(DIN Series)mm	Enterprise internal Control standards mm	(Special high-precision)mm
O D	4-30	+-0.10	+-0.08	+-0.05	+-0.03
O D	31-40	+-0.15	+-0.15	+-0.05	+-0.03
O D	41-50	+-0.20	+-0.20	+-0.08	+-0.03
O D	51-60	+-0.25	+-0.25	+-0.08	+-0.03
Wall thickness	0.5-7	+-10% (MIN)+-0.12	+-10%	+-10%(MIN)+-0.05	+-10%(MIN)+-0.03

Production Process:

• Pretreatment : Pickling­—Phosphating—Saponification

 

 

• Cold drawn/cold rolled

 

 

• Annealing furnace——+SR

 

 

• Straightener—— Straightening

 

 

•  Straightness inspecting

 

 

• Dimension inspecting

 

  

 

• Sawing

 

 

 

• Lathe

 

 

• Polishing

 

 

• Products inspecting

 

 

• Finished Products

 

 

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