Atlas Copco Compact 8 Hydraulic Bolt Tensioners

Atlas Copco Compact 8 Hydraulic Bolt Tensioners

Atlas Copco Compact 8 is a family of hydraulic bolt tensioners designed for precise work on loaded bolted joints.

It is built for industrial applications where controlled initial load, defined stroke, and consistent tensioning performance matter.

The range covers multiple bolt sizes and offers both imperial and metric versions to suit the job site and the fastening standard.

The tools are designed for a maximum working pressure of 1,500 bar, with a maximum ram stroke of 30 mm on tools 01 to 07 and 20 mm on tool 00.

Key Features

• High working pressure: The tools are built for a maximum working pressure of 1,500 bar / 21,750 psi.
• Matched ram stroke: Tools 01 to 07 have a maximum ram stroke of 30 mm, while tool 00 has a 20 mm stroke.
• Wide size coverage: The family includes C8-00 through C8-07 for a broad range of bolt diameters and thread sizes.
• Imperial and metric options: Imperial and metric versions are available, making it easier to match the site standard.
• Clear ordering structure: Each model has dedicated ordering numbers, including versions with Load Cell options.
• Application-focused range: The series offers multiple configurations so the right tensioner can be selected for the bolt diameter and thread.

Frequently Asked Questions

How do I choose the right Compact 8 model?
Step 1: Identify the bolt diameter and thread used on the joint.
Step 2: Check whether the application calls for an Imperial or Metric version.
Step 3: Match the bolt size to the correct C8-00 to C8-07 model.
Step 4: If load monitoring is needed, choose a version with a Load Cell option.
Step 5: Confirm the exact ordering number for the selected configuration.

What is the difference between tool 00 and tools 01 to 07?
The main difference is ram stroke.
Tool 00 has a maximum ram stroke of 20 mm, while tools 01 to 07 have a maximum ram stroke of 30 mm.

Are both metric and imperial versions available?
Yes.
The Compact 8 family includes both Imperial and Metric versions to suit different fastening standards.

What applications is this series suited for?
It is suited for industrial assembly work where controlled bolt tensioning, repeatable initial load, and high-pressure operation are required.

Are Load Cell versions available?
Yes.
Some configurations include a Load Cell ordering number, allowing you to select a version with load sensing capability.

What should I check before placing an order?
Check the bolt diameter, thread type, whether you need Imperial or Metric, and whether tool 00 or tools 01 to 07 are the right fit.
Then match the exact ordering number to the configuration.

ℹ️ Please note: this specification includes technical diagrams from the Atlas Copco catalog. The complete data and drawings are available in the PDF attached to this page (the “More details – PDF” button).

Atlas Copco Compact 8 Hydraulic Bolt Tensioner – Specifications

Model	Ordering No.	Bolt Dia	Thread Pitch	Tool Dia	Side Dia	Tool Height	Radial Dim’n	Max Ini­ tial Bolt Load	Hyd Area mm2	Ram Stroke	Extra Stud Length	Headroom Dimension	AF	Radial Dim’n	Dim’n
		D		A	F	B	C				G	E	H	J	K
		Inch		mm	mm	mm	mm	kN		mm	mm	mm	mm	mm	mm
C8-00	8434220372	0.75	UNC	66.0	66.0	123	20	190.21	1268.420	20	113.5	214.5	50.2	31.6	97.00
	8434220373	0.875	UNC	66.0	66.0	123	20	190.21	1268.420	20	110.3	214.5	50.2	31.6	97.00
C8-01	8434220374	1	8-UN	87.0	87.0	153	25	328.87	2193.020	30	137.1	270.5	65	41.5	127.00
	8434220375	1.125	8-UN	87.0	87.0	153	25	328.87	2193.020	30	134.0	270.5	65	41.5	127.00
C8-02	8434220376	1.25	8-UN	104.5	104.5	165	28	514.84	3433.170	30	142.8	286.5	82.5	50.15	135.00
	8434220377	1.375	8-UN	104.5	104.5	165	28	514.84	3433.170	30	139.6	286.5	82.5	50.15	135.00
C8-03	8434220378	1.5	8-UN	123.1	118.3	184.5	35	746.70	4979.300	30	155.9	321.5	90	59.1	150.50
	8434220379	1.625	8-UN	123.1	118.3	184.5	35	746.70	4979.300	30	152.8	321.5	90	59.1	150.50
C8-04	8434220380	1.75	8-UN	150.0	143.5	210.75	48	1177.31	7850.800	30	175.8	365.0	110	71.7	169.75
	8434220381	1.875	8-UN	150.0	143.5	210.75	48	1177.31	7850.800	30	172.7	365.0	110	71.7	169.75
	8434220382	2	8-UN	150.0	143.5	210.75	48	1177.31	7850.800	30	169.5	365.0	110	71.7	169.75
C8-05	8434220383	2.25	8-UN	182.5	174.3	235.75	59	1904.04	12696.940	30	188.1	393.0	136	87.1	179.75
	8434220384	2.5	8-UN	182.5	174.3	235.75	59	1904.04	12696.940	30	181.8	393.0	136	87.1	179.75
C8-06	8434220385	2.75	8-UN	210.0	210.0	259.75	65	2542.11	16951.840	30	199.4	432.0	163.5	105	199.75
	8434220386	3	8-UN	210.0	210.0	259.75	65	2542.11	16951.840	30	193.1	432.0	163.5	105	199.75
C8-07	8434220387	3.25	8-UN	258.1	258.1	302.8	85	4059.32	27069.190	30	229.8	492.6	204	129	232.25
	8434220388	3.5	8-UN	258.1	258.1	302.8	85	4059.32	27069.190	30	223.4	492.6	204	129	232.25
	8434220389	3.75	8-UN	258.1	258.1	302.8	85	4059.32	27069.190	30	217.1	492.6	204	129	232.25

Technical diagram from the Atlas Copco catalog (p. 56)

Atlas Copco Compact 8 Hydraulic Bolt Tensioner – Specifications

		Imperial			Metric
Tool No.	Load Cell Ordering No.	Bolt D (inch)	Thread P	Imperial Order­ ing No.	Bolt D (inch)	Thread P	Metric Ordering No.
C8-00	8434220054	3/4″	UNC	8434220413	M20	2.5	8434220415
		7/8″	UNC	8434220414	M22	2.5	8434220416
C8-01	8434220055	1″	8-UN	8434220018	24	3	8434220020
		1 1/8″	8-UN	8434220019	27	3	8434220021
					30	3.5	8434220022
C8-02	8434220056	1 1/4	8-UN	8434220023	33	3.5	8434220025
		1 38″	8-UN	8434220024	36	4	8434220026
C8-03	8434220057	1 1/2″	8-UN	8434220027	39	4	8434220029
		1 5/8″	8-UN	8434220028	42	4.5	8434220030
C8-04	8434220058	1 3/4″	8-UN	8434220031	45	4.5	8434220034
		1 7/8″	8-UN	8434220032	48	5	8434220035
		2″	8-UN	8434220033	52	5	8434220036
C8-05	8434220059	2 1/4″	8-UN	8434220037	56	5.5	8434220039
		2 1/2″	8-UN	8434220038	60	5.5	8434220040
					64	6	8434220041
C8-06	8434220060	2 3/4″	8-UN	8434220042	68	6	8434220044
		3″	8-UN	8434220043	72	6	8434220045
					76	6	8434220046
C8-07	8434220061	3 1/4″”	8-UN	8434220047	80	6	8434220050
		3 1/2″	8-UN	8434220048	85	6	8434220051
		3 3/4″	8-UN	8434220049	90	6	8434220052
					95	6	8434220053

Atlas Copco Compact 8 Hydraulic Bolt Tensioner – Specifications

Model	Ordering No.	Bolt Dia D mm	Thread Pitch	Tool Dia	Side Dia	Tool Height	Radial Dim’n	Max Ini­ tial Bolt Load kN	Hyd Area mm2	Ram Stroke mm	Extra Stud Length	Headroom Dimension	AF	Radial Dim’n	Dim’n
				A	F	B	C				G	E	H	J	K
				mm	mm	mm	mm				mm	mm	mm	mm	mm
C8-01	8434220390	24	3	87.0	87.0	153	25	328.87	2193.020	30	138	270	65	41.5	127.00
	8434220391	27	3	87.0	87.0	153	25	328.87	2193.020	30	135	270	65	41.5	127.00
	8434220392	30	3.5	87.0	87.0	153	25	328.87	2193.020	30	133.5	271.5	65	41.5	127.00
C8-02	8434220393	33	3.5	104.5	104.5	165	28	514.84	3433.170	30	142.5	287.5	82.5	50.15	135.00
	8434220394	36	4	104.5	104.5	165	28	514.84	3433.170	30	141	289	82.5	50.15	135.00
8434220395 C8-03 8434220396		39	4	123.1	118.3	184.5	35	746.70	4979.300	30	157.5	324	90	59.1	150.50
		42	4.5	123.1	118.3	184.5	35	746.70	4979.300	30	156	325.5	90	59.1	150.50
C8-04	8434220397	45	4.5	150.0	143.5	210.8	48	1177.31	7850.800	30	179.25	369	110	71.7	169.75
	8434220398	48	5	150.0	143.5	210.8	48	1177.31	7850.800	30	177.75	370.5	110	71.7	169.75
	8434220399	52	5	150.0	143.5	210.8	48	1177.31	7850.800	30	173.75	370.5	110	71.7	169.75
C8-05	8434220400	56	5.5	182.5	174.3	235.8	59	1904.04	12696.940	30	196.25	400	136	87.1	179.75
	8434220401	60	5.5	182.5	174.3	235.8	59	1904.04	12696.940	30	192.25	400	136	87.1	179.75
	8434220402	64	6	182.5	174.3	235.8	59	1904.04	12696.940	30	189.75	401.5	136	87.1	179.75
C8-06	8434220403	68	6	210.0	210.0	259.8	65	2542.11	16951.840	30	209.75	440.5	163.5	105	199.75
	8434220404	72	6	210.0	210.0	259.8	65	2542.11	16951.840	30	205.75	440.5	163.5	105	199.75
	8434220405	76	6	210.0	210.0	259.8	65	2542.11	16951.840	30	201.75	440.5	163.5	105	199.75
C8-07	8434220406	80	6	258.1	258.1	302.8	85	4059.32	27069.190	30	240.8	501.05	204	129	232.25
	8434220407	85	6	258.1	258.1	302.8	85	4059.32	27069.190	30	235.8	501.05	204	129	232.25
	8434220408	90	6	258.1	258.1	302.8	85	4059.32	27069.190	30	230.8	501.05	204	129	232.25
	8434220409	95	6	258.1	258.1	302.8	85	4059.32	27069.190	30	225.8	501.05	204	129	232.25