NEXTURN 32MM CNC SWISS MACHINEOur Nexturn 32mm swiss machine was purchased brand new in May 2005.  The Nexturn is a CNC swiss automatic mated with an Iemca bar loader.  This machine can run parts from 0.10” to 1.25” diameter continuously from bar stock, with full 3-axis milling on two spindles and 9 live tool stations.  It is a very economical method for producing complex parts in large lot sizes.

Machine purchased new in June, 2007.  The NL2000 incorporates full 3 axis milling with precision turning, enabling the precise manufacturing of components with complex and challenging relational features. In addition to increased throughput over conventional processes, this equipment will simplify production of parts that have been economically prohibitive to manufacture in small or medium lot sizes.  Machine matched with SMW bar feed to facilitate production of parts from 0.2” to 2.50” continuously from bar stock.Machine capacity is 9.84” in diameter, by 20.0” in length, Y-axis travel +/- 2.0” from center, full C-axis, live tooling to 6000 RPM.

ISOinsertnomenclature pdf

OKUMA LB15 TURNING CENTERS (2)Machines purchased new in 1987 and 1990, with all software options.Machine capacities are 9.84" in diameter, by 19" in length.

Without knowing about your lathe, it's impossible to offer useful advice. My experience is that 0.8mm tip dia. inserts don't suit a Myford Super 7 – it's just not rigid enough to work the insert at depths of cut and feed rates that justify the larger tip radius. However, an Emco Maximat Super 11 takes them in its stride – even 'blunt' inserts, designed for hogging off metal, rather than fine finishing – and with a very good surface finish. Not bashing Myfords, it's just horses for courses…

Carbide insertsize chart

Roberts Precision Machine offers full CNC machining services and general contract management for manufactured goods on a build to order basis using the following machines.

TurninginsertIdentification chart

Like Jason I mainly use the .2mm rad inserts as they are more suitable for the type of parts I make but do use the .4 for some work as facing cuts with a .2 rad have to be less than tip rad to cut cleanly.

I use 0.2mm, 0.4mm and 0.8mm radius inserts. The 0.4mm inserts get used most for general turning and the radius is a good compromise when a really sharp internal corner is not needed. I use the 0.2mm inserts for smaller diameter work and where a sharp internal corner is needed. The 0.8mm inserts are used for heavy roughing, especially in steel and cast iron, and where I want a nice fillet.

Tool noseradiuschart

I saw the following on their website 'We suggest the use of 0.8mm corner radius inserts for general cutting, and 0.4mm corner radius inserts for finishing.' From personal experience you can get chatter from using too large a tip radius

Machine purchased new in 2020 with FMB bar loader.  The TT2100SYY incorporates full 3-axis milling and precision turning on two spindles simultaneously.  This allows for ‘single piece flow’, a completed part from bar stock with no further machining required.  For repeating small batches of complex and demanding feature par

To some extent the smaller the insert radius the smaller the final depth of cut can be and still maintain a decent finish, although many other factors also need to be considered. Similarly the larger the radius the higher the feedrate can be for a given finish, which may help with chatter problems. Speaking of which I've never had a chatter problem due to the 0.8mm radius inserts, but I do drive them fairly hard.

Machine purchased new in June, 1996 with all software options.   The Okuma LB15IIMY/1000 incorporates full 3 axis machining with precision turning.  Auxiliary equipment includes LNS bar feed system, giving the capacity of manufacturing part from .2” to 2.0” continuously from bar stock.Machine capacity is 9.84” in diameter, by 39.0” in length, Y-axis travel +/- 2.0” from center, full C-axis, live tooling to 4500 RPM.

Without knowing about your lathe, it's impossible to offer useful advice. My experience is that 0.8mm tip dia. inserts don't suit a Myford Super 7 – it's just not rigid enough to work the insert at depths of cut and feed rates that justify the larger tip radius. However, an Emco Maximat Super 11 takes them in its stride – even 'blunt' inserts, designed for hogging off metal, rather than fine finishing – and with a very good surface finish. Not bashing Myfords, it's just horses for courses…

STAR SR20RIV SWISS MACHINEStar's newest SR-20RIV swiss machine has the most advanced features and broad range of machining variations including a 27-position tool station which can accommodate up to 41 tools with a full B-axis for cross drilling/milling and a variety of tooling options. The SR-20RIV swiss machine has a tool post especially designed for backworking, equipped with a Y-axis control function as standard. Both the main and sub spindles use a built-in motor and built-in sensor for improving indexing accuracy. This machine is designed with complex machining functions adaptable to multiple industries.  We have this machine matched to an FMB magazine automatic bar loader for 24/7 operation capabilities.

ISOinsertchart

Insertnoseradiuschart

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I seem to have always gone for what I got origionally when I bought the tool holder, 0.4 however I notice Arc also sell 0.8 and just wondering what the advantage/dissadvantage of the two sizes

Mostly 0.2mm for me with 0.4 kept for roughing steel and iron castings. The 0.8mm only come out if I want a decent corner fillet for things that I want to look cast. I find the smaller radius deflects long slender work less so good for valves and crankshafts, etc.

Home › Forums › General Questions › Carbide inserts. 0.4 or 0.8 This topic has 12 replies, 10 voices, and was last updated 22 February 2020 at 07:00 by petro1head. Viewing 13 posts - 1 through 13 (of 13 total) Author Posts 21 February 2020 at 10:31 #27164 petro1headParticipant @petro1head Advert 21 February 2020 at 10:31 #453324 petro1headParticipant @petro1head Time for some new inserts. I am after ferrous and non ferrous. I seem to have always gone for what I got origionally when I bought the tool holder, 0.4 however I notice Arc also sell 0.8 and just wondering what the advantage/dissadvantage of the two sizes Edited By petro1head on 21/02/2020 10:31:20 21 February 2020 at 10:39 #453325 Tony Pratt 1Participant @tonypratt1 I saw the following on their website 'We suggest the use of 0.8mm corner radius inserts for general cutting, and 0.4mm corner radius inserts for finishing.' From personal experience you can get chatter from using too large a tip radius Tony 21 February 2020 at 10:55 #453329 petro1headParticipant @petro1head So prob best just to stick with what i Know, 0.4mm 21 February 2020 at 11:20 #453333 Anonymous I use 0.2mm, 0.4mm and 0.8mm radius inserts. The 0.4mm inserts get used most for general turning and the radius is a good compromise when a really sharp internal corner is not needed. I use the 0.2mm inserts for smaller diameter work and where a sharp internal corner is needed. The 0.8mm inserts are used for heavy roughing, especially in steel and cast iron, and where I want a nice fillet. To some extent the smaller the insert radius the smaller the final depth of cut can be and still maintain a decent finish, although many other factors also need to be considered. Similarly the larger the radius the higher the feedrate can be for a given finish, which may help with chatter problems. Speaking of which I've never had a chatter problem due to the 0.8mm radius inserts, but I do drive them fairly hard. While I find it useful to have all three options available the 0.4mm insert is a good compromise. Andrew 21 February 2020 at 11:35 #453334 Douglas JohnstonParticipant @douglasjohnston98463 If you have a hobby size lathe I would stick to 0.4 radius as a good compromise. I must admit I like the 0.2 ones for a lot of what I do but the cutting point of the insert can be easily damaged if not careful. Doug 21 February 2020 at 12:30 #453342 CirclipParticipant @circlip Bench grinder and a lick on the tip with a fine stone for us non NASA types.

MORI-SEIKI NV5000 VERTICAL MILLS  (2)Machines purchased new in 2006 and 2011.  The NV5000s are equipped with two pallets, high pressure coolant, and Renishaw probes.  The pallet system gives the capacity to change parts while the machine is working, facilitating higher throughput and shorter lead times.  High pressure coolant is essential for small feature milling and deep hole drilling.  The probing capability is ideal for work with castings.

ISOcarbide Insertchart

Carbide insertidentification chart PDF

Machine purchased new in 2019 with full pallet system.  This machine is the last word in precision 5-axis machined parts, with the combined advantage of a pallet pool to support high volume and continuous production. The machine features Renishaw probing and tool setter, high pressure coolant, advanced tool management and a pallet controller that allows for lights-out production. We use tooling components from Lang, Orange, and 5th Axis for perfect work holding every time.

If you have a hobby size lathe I would stick to 0.4 radius as a good compromise. I must admit I like the 0.2 ones for a lot of what I do but the cutting point of the insert can be easily damaged if not careful.

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775 Motor based Dynamo ? Diesel Heaters Split Cotter Clamp upgrade – Clarke Combination Lathe Jakobs Gear Hobber from scrap (no casting) MEW 346 creates new definition of ‘universal’, What did you do Today 2024 BLACKMAIL FreeCAD version 1.0 released Jaguar [oh dear] Myford Dixon-type toolholders: different dimensions?

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