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Telescopic cylinder barrel

The specification range of Huabang cold drawn pipe/scraping and rolling pipe ranges from 50mm to 273mm. The steel types include 25Mn, 20 #, 45 #, 27SiMn and other alloy steels. The scraping/honing capacity can be up to 14 meters. The annual production capacity reaches 20000 tons.

Key words: cold drawn pipe

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Product Description

TECHNICAL PARAMETERS

workmanship	Type	internal diameter(mm)	length(mm)	Straightness	tolerance	Wall thickness difference	Roughness
workmanship	Type	ID (rm)	Length(mm)	Straightness	Tolerance	Wall Variation	Roughness (um)
Cold drawing	Cold-drawn	30-250	≤10.5M	0.3- 1/1000mm		±5%	0.8-1.5
honing	Honed	30-250	≤6M	0.3- 1/1000mm	H8-H9	±5%	0.4-0.8
Scraping roll	SRB	60-200	≤6M	0.3- 1/1000mm	H8	±5%	0.2

Mechanical properties of cold drawing

Delivery status	Cold drawing		Cold drawing+stress relief annealing
Steel grade	tensile strength (MPa)	elongation(%)	tensile strength (MPa)	yield strength (MPa)	elongation(%)	hardness(HB)
Steel grade	TS(Mpa)	Elongation(%)	TS(Mpa)	YS(Mpa)	Elongation(%)	Hardness (HB)
20#	≥550	25	2510	2470	≥12	175
45#	≥650	24	≥600	≥520	≥12	207
16Mn	z640	≥10	≥600	≥520	≥15	190
25Mn	≥640	210	≥600	≥510	≥15	195
27SiMn	2840	≥7.5	2800	≥720	≥10	195

Honing/scraping technical parameters

inside diameter(mm)	Inner diameter deviation
inside diameter(mm)	H7	H8	H9	H10	H11
30	+0.0210	+0.0330	+0.0520	+0.0840	+0.1300
>30-50	+0.0250	+0.0390	+0.0620	+0.1000	+0.1600
>50-80	+0.030	.0460 +0.0	+0.0740	+0.1200	+0.1900
>80-120	+0.0350	+0.0 .0540	+0.1000	+0.1400	+0.2200
>120-180	+0.040	0630 +0.06	+0.1 0.1150	+0.1600	+0.2500
>180-250	+0.0 +0.0460	+0.072 720	+0.13 0.1300	+10.1 10.1850	+0.2900
>250-315	+0.0520 +0.0	+0.08 .0810	+0.140 0.1400	+0.21 2100	+0.3200
>315-400	+0.0570	+0.0890 .0890	+0.1400 0.1400	+0.23 0.2300	+0.3600

Product Specification Sheet

Hydraulic red cylinder				Hydraulic cylinder
internal diameter	external diameter	wall thickness (a)	Unit weight (mm)	internal diameter	external diameter	wall thickness (mm)	Unit weight(mm)
100	115	7.5	19.88	140	178	19	74.50
100	118	9	24.19	150	168	9	35.29
100	121	10.5	28.61	150	170	10	39.46
100	127	13.5	37.79	150	175	12.50	50.09
110	127	8.5	24.84	150	180	15	61.03
110	130	10	29.59	160	180	10	41.92
110	133	11.5	34.46	160	184	12	50.90
110	140	15	46.24	160	188	14	60.07
115	131	8	24.27	160	190	15	64.73
115	135	10	30.83	160	194	17	74.20
115	138	11.5	35.87	170	203	16.50	75.88
115	140	12.5	39.3	175	194	9.50	43.22
120	135	7.5	23.58	180	200	10	46.85
120	140	10	32.06	180	203	11.50	54.31
120	142	11	35.54	180	210	15	72.13
120	146	13	42.64	180	214	17	82.59
125	140	7.5	24.51	180	219	19.50	95.93
125	146	10.5	35.09	200	225	12.50	65.50
125	148	11.5	38.71	200	230	15	79.53
125	150	12.5	42.38	200	235	17.50	93.86
125	152	13.5	46.11	200	245	22.50	123.45
125	156	15.5	53.7	220	250	15	86.93
125	159	17	59.53	220	273	26.50	161.09
130	152	11	38.25	250	280	15	98.02
130	156	13	45.84	250	299	24.50	165.84
130	160	15	53.64	280	325	22.50	167.84
135	160	12.5	45.47	280	351	35.50	276.2
140	160	10	36.99	300	351	25.50	204.68
140	163	115	42.96	300	377	38.50	321.38
140	166	13	49.05	320	351	15.50	128.24
140	168	14	53.17	320	377	28.50	244.93

internal diameter	external diameter	wall thickness (mm)	Unit weight (mm)	internal diameter	external diameter	wall thickness(mm)	Unit weight (mm)
90	100	5	11.71	50	60	5	6.78
				50	63	6.5	9.06
100	110	5	12.95	50	65	7.5	10.63
				50	70	10	14.80
125	135	5	16.03	56	66	5	752
				60	70	5	8.01
140	152	6	21.60	60	73	6.5	10.66
				60	80	10	17.26
150	160	5	19.11	63	76	6.5	11.14
				63	80	8.5	14.99
160	170	5	20.34	63	83	10	18.00
				65	75	5	8.63
160	172	6	24.56	65	80	7.5	13.41
				70	80	5	9.25
180	194	7	32.28	70	83	6.5	12.26
				70	86	8	15.39
200	214	7	35.73	70	90	10	19.73
				75	90	7.5	15.26
200	216	8	41.03	75	95	10	20.96
				80	93	6.5	13.87
200	219	95	49.08	80	95	7.5	16.81
				80	100	10	22.19
250	266	8	50.9	80	102	11	24.68
				80	108	14	32.45
250	273	11.5	74.16	85	98	6.5	14.67
				85	108	7.5	17.11
300	320	10	76.45	85	105	10	23.43
				90	102	6	14.20
320	340	10	81.38	90	105	7.5	18.03
				90	108	9	21.97
400	426	13	132.40	90	110	10	24.66
				90	114	12	30.18