Advice on airline hose ... new fittings .. crimping issue.

Submariner1

Senior Member
Joined
Sep 3, 2016
Messages
4,694
Reaction score
788
Location
Windsor Berkshire
Your Mercedes
CL500 2009 5.5
Any experts on crimping ferrules. Max Pressure 150 psi.
I need to secure new stainless steel 1/2” BSP hose tails on a Rubber Alloy 1/2” ID 21mm OD hose.

Ideally I would like to use stainless steel ferrules ... but obviously do not have a swager.
Local people only use their hose and fittings, others want £12 an end to crimp ... plus a long drive.

Alternatively I could use these stainless ear clamps
1AB32FA6-F6BB-4370-8F4E-25C592A3A776.jpeg

not a great fan, as they leave protruding flattened ears, and I need to buy a crimp pliers like this Knipex 220 mm long. Circa £23
83D0CB6B-3210-44A5-AA68-EDAB493BEF7E.jpeg
but I found an old pair of nail pullers 197mm long, which seem pretty similar. 99E868FB-25FB-4503-AE5A-E99E753EBC90.jpeg
Could I just clean up the ends and try and replicate the profile?, apart from being a tad shorter .. And requiring more pressure ... would they crimp the ears?

Alternatively if I bought a stainless ferrules like this
2091A6D0-64C4-43EF-A230-476CC61F3146.jpeg

Could I put one of these on the hose, and then put a Couple of 2 ear O clamps over the ferrule and compress the O clamps, hoping to effectively ‘dent’ the ferrule in ... i.e. a sort of heath robinson crimp mechanisim. And then cut off the ear O clamps? Hopefully leaving a crimped Ferrule?

I suspect, because the ear clamp is 8mm wide, it would be very difficult to use this to dent/crimp in the stainless ferrule?
What do you think? Possible or highly unlikely?

Or would using an aluminium ferrule be easier to compress in a securing dent?

My gut feel is the only real home DIY option, is just to use a couple of the the 2 Ear O Clamps and live with the protrusions.

Right pain in the arse to fix up my air-filter to be bolted to the wall and also to be attached to the Compressor when mobility is needed. And have stainless fittings before the air-filter.
D76539D1-12D9-4D3B-8A48-CB87B3F85BE5.jpeg
 

LostKiwi

Senior Member
Joined
Aug 25, 2006
Messages
31,363
Reaction score
21,631
Location
Midlands / Charente-Maritime
Your Mercedes
'93 500SL-32, '01 W210 Estate E240 (RIP), 02 R230 SL500, 04 Smart Roadster Coupe, 11 R350CDi
I have an hydraulic battery terminal crimper that would probably work with those ferrules. Crimps to a hex shape.
Not sure what the max jaw width is.
 

Craiglxviii

Senior Member
Joined
Sep 6, 2015
Messages
17,781
Reaction score
7,426
Location
Cambs UK
Your Mercedes
970 Panamera Turbo; W221 S500L AMG Line, C215 CL500, W251 R350L AMG Line, plus several more now gone
Live with the protrusions. What hassle are they going to cause, really?
 
OP
Submariner1

Submariner1

Senior Member
Joined
Sep 3, 2016
Messages
4,694
Reaction score
788
Location
Windsor Berkshire
Your Mercedes
CL500 2009 5.5
  • Thread Starter
  • Thread starter
  • #4
I have an hydraulic battery terminal crimper that would probably work with those ferrules. Crimps to a hex shape.
Not sure what the max jaw width is.
Thanks, I looked at those - they seem fine for 1/4” bsp but are a bit too small for the fatter 1/2” BSP ferrules that are 25mm oD.
 

Tony Dyson

Senior Member
Joined
Aug 26, 2018
Messages
4,038
Reaction score
2,585
Location
God's Country
Your Mercedes
2014 C 220 CDI W204 OM 651
I think you need to be speaking to the "Rubber Alloy" hose manufacturers for more specific details on what you need, DIY alternatives usually end up in numerous aborted attempts before settling on something that wasn't quite what you were looking for! Crimping tools for anything electrical are designed to crimp soft copper tube terminals not SS and the tools picture have cutting faces you would need to blunt, better suited would be a pair of mole grips.
 


Welwyn Merx Limited is a family run business with genuine passion, dedication and 25 years of experience dealing with Mercedes-Benz and AMG passenger cars.
Tel: 01707 395999www.welwynmerx.uk
Top Bottom