SRDPN2020K10 tool holder

[Sonic EscapeParticipant @sonicescape38234]

Has anyone used this type of cutting tools? I think they are for roughing. They support many types of inserts but I can't find the specifications for each of them. I suppose the inserts differ depending on the material that is being cut?

[Sonic EscapeParticipant @sonicescape38234]

[HuubParticipant @huub]

Inserts and their application is a discipline of its own.

These round inserts have a enormous "nose radius". They will give a better finish than inserts that have a small nose radius like a CCGT060204. A large nose radius results in large cutting forces. So these round inserts are not used for rouging but for finishing jobs on a rigid lathe.

The different colours shows different coatings and each coating is optimised for a certain material type and turning conditions.

You can also see different chip breakers. Chip breakers are also optimised for material types and turning conditions.

The shiny ones (middle row), are probably polished inserts. These polished inserts have very sharp cutting edges and are commonly used for aluminium and plastics. On non rigid lathes, polished inserts that have a small nose radius like CCGT060202 and DCGT070202 give good results when cutting steel, stainless or titanium.

[Paul LousickParticipant @paullousick59116]

I have used one on a ball turner and for making handles like these. Because of their large radius could only take small cuts but good for producing a good finish on curved surfaces

[NimbleParticipant @nimble]

Hi Sonic,

I have just purchased too holder SRDPN1010H10T3 off Ali Express (LRC TOOL OFFICIAL STORE) They supplied with it inserts RPMT1073 Other insert types were also listed.

Like Paul my intention is to use them on a ball turner

**LINK**

Regards, Neil

[John ReeseParticipant @johnreese12848]

I have used a similar tool. Even on my 16" lathe I have to be careful how much tool contact I have or I get chatter. I am not sure if that tool would be suitable for a small lathe.

[peak4Participant @peak4]

They work OK in a fly cutter too.

Bill

[DiogenesIIParticipant @diogenesii]

Because Sonic still needs to get his lathe set-up and 'tuned-in', I think that tool with it's large radius is unsuitable for 'first cuts' – it will introduce another variable and offer poor general-purpose cutting performance in any case.

Sonic's lathe is bigger than mine, maybe something like SCLCR/L for 'setting up' and general purpose work, cheap to buy and with wide a range of tips universally available, or maybe holders for something like CNMG might offer advantages for a lathe of this size..? ..further comment welcome..

..almost anything with a smaller 'corner' will be easier to 'set-up and get started with' than round tips, and be more suited to general purpose and roughing work in the future.

[JasonBModerator @jasonb]

Their main use is for profiling curved items like Paul has shown, can also be useful if you need a large internal fillet and for weld prep but not really suitable as your everyday go to tool or for roughing. Not least because you can't turn upto a shoulder.

Also the 10mm insert is probably going to be too big for most hobby needs holders that that the smaller RCMT06 or RCGT06 would be better if you did want to try the round tools.

[John HinkleyParticipant @johnhinkley26699]

Not surprisingly, I agree wholeheartedly with Jason! I bought a similar holder with 6mm inserts specifically for use with my experimental taper turning/copying attachment as I was having difficulty with "normal" tools.

You can see it in use and it produces reasonable results in aluminium as in this video, from about 11.30 mins on.

I also use it very occasionally when I need to produce a radius for stress relief at a transitional joint, for example, though that is rare for me.

John

[Sonic EscapeParticipant @sonicescape38234]

Ok, understood. I think I'll buy later this type of tool. But this morning on the local flea market I found something interesting. If large radius produce good finish then this thing should be the best

It is strange that the tip is brazed. I don't think it is carbide.

[Clive Brown 1Participant @clivebrown1]

Could be a short length of hss attached to a mild steel shank. More common in days gone by.

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