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Posted 20 hours ago

15mm White SPEEDFIT Collet Locking Clip - CM1815W - Pack of 10

£9.9£99Clearance
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About this deal

Collet covers for use with standard Speedfit fittings, are available in white or in red or blue to allow colour coding of pipes. Initially push-fit fittings were being used for fuel systems and now they are an essential part involved with low-pressure power steering systems and aiding the development of greener engines. Your extruder system has a finite amount of pushing force. You want as much as possible of that pushing force to be used to generate pressure in your HotEnd, as it’s what causes the molten filament to actually extrude from the print-head (pretty crucial to 3D printing!).

Speedfit Fittings have a unique grip then seal construction made up of a collet with stainless steel teeth to grip the pipe and an ‘O’ ring to provide a permanent leak proof seal. Use of the Superseal Pipe Insert ensures a double ‘O’ ring seal. That’s right, plastic push-fit fittings are completely tool free. The pipe simply needs to be inserted within the fitting, where leak free connection is ensured with that same push-fit action, for which no tools are required. Because of this push-fit fittings are entirely demountable, meaning they can be disconnected and reused should a system need to be dismounted.

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We have a new high-performance bowden tube , and ways of making our tube couplings grip the tube more securely using a pre-tensioning clip . These will make your bowden system more responsive and reliable. Read on to find out how. What is a bowden system? You just need to increase retraction and your bowden system will be as precise as a direct extruder" Push the pipe into the fitting, up to the pipe stop. If the Speedfit Pipe has been cut correctly the insertion mark on the pipe will be level with the collet head. The ‘O’ ring on the Superseal Pipe Insert provides a secondary seal against the bore of the fitting. A good connection has been made. By diving a little deeper into the physics of where the downsides to a bowden system really come from, we can begin to understand how to improve these systems by minimising the negative effects. What needs fixing? More lag/lash/hystersis/slop/whatever you want to call it. The extrusion system is simply not going to be as responsive as a direct extrusion system

In the 1980s the first ever fibre optic push-fit fitting was developed by John Guest in collaboration with BT. Such fittings are now commonplace, with over 2.5 million being produced every year for delivering high speed internet to millions of homes and offices. An ‘O’ ring at the head of the insert and the shape of the stem, provide a secondary seal against the bore of the fitting. A combination of this and the main ‘O’ ring ensure a good connection. To increase the stiffness of the filament spring we are introducing Capricorn PTFE Tubing; a new, higher tolerance tube, with a tighter 1.9mm internal diameter and added internal lubricant. This has a twofold benefit - it reduces sliding friction of the filament in the tube, but most importantly it makes the filament 'spring' stiffer, by quite a lot. The tighter internal diameter permits the filament to have far less flexion than in our standard 2mm ID tubing, meaning that it can't bunch or coil up. This really firms up the response of the whole bowden system. Because the filament has no space in which to bend within the tube, movement produced by the extruder is much more efficiently translated down the tube, into the HotEnd, and out the other side. Retractions try to counter this by “pre-pumping” at the start of extrusion and relieving pressure at the end of extrusion. The more nuanced pressure advance algorithms do a conceptually similar thing, but are continuously compensating during acceleration and deceleration. Whatever control method you use, it is not possible to gain control authority over a system that is inherently less responsive. You can compensate for the errors to an extent, but you can’t eliminate them. Your extruder has a finite amount of speed and acceleration which it can use for compensating.

What needs fixing?

Ensure the pipe is free of score marks. Cut the pipe square. When using Speedfit Barrier Pipe cut along an insertion mark. We recommend the use of JG Pipe Cutters. To prevent damage to the ‘O’ ring remove all burrs and sharp edges. Of course, tools need to be used to cut pipes to size and ensure for clean connections between pipes and fittings, but to create the connection itself – no tools are required. You just have to make sure that you don’t use poor-quality filament with an uneven diameter, which these days is far less of a concern than when we originally introduced bowden versions of E3D HotEnds.

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