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Description
CUTTING WIDTH2 mm
CUTTING DEPTH T MAX15 mm
MAX. BAR DIAMETERØ30 mm
INSERT · 2 EDGESMGMN 200
Parting tool 12X12 2 mm T15 Smoxh
Technical data for the holder for Korloy MGMN 200 inserts
| Technical data | |
|---|---|
| Designation | BDKT R 1212 K2C T15 |
| Type | holder for parting and external grooving |
| Shank height h | 12 mm |
| Shank width B | 12 mm |
| Overall length L | 100 mm |
| Dimension S (to the insert edge) | 12.3 mm |
| Cutting depth T max | 15 mm |
| Max. parting diameter D max | Ø30 mm |
| Insert pocket | MGM. 2C (MGMN 200, width 2 mm) |
| Hand | R – right-hand (left-hand version: SM09691) |
BDKT-R 1212 K2C T15 – operation with MGMN inserts
What this tool can do, screw clamping and a double-edged insert
Parting tool 2 mm BDKT-R 1212 K2C T15 is a Smoxh tool holder for parting off workpieces from bar stock and cutting external grooves. The MGMN 200 carbide insert is secured by a screw clamp from above: the BKTV M5x17 screw draws the flexible lip of the head against the insert. Replacement takes a dozen or so seconds, without removing the tool from the tool post.
The insert is supported by the narrow blade of the head, 15 mm long — this is the cutting depth T max. Beyond this point, the body widens to the shank width, so only the blade fits into the 2 mm slot. This limits the tool to parting off bars up to Ø30 mm, or twice T max.
Dimension S = 12.3 mm means that the cutting edge projects 0.3 mm beyond the side of the 12 mm wide shank. This lets you cut close to the chuck jaws without the shank rubbing against the workpiece face. The 12x12 mm shank with a length of 100 mm fits the tool posts of small lathes and automatic lathes.
The MGMN 200 insert has two cutting edges at opposite ends. When the first becomes dull, rotate the insert by 180° and use the second.
What this tool can do – parting and grooving
Parting – cutting a part off a bar
The blade enters the bar all the way to the axis and the part separates. Bars up to Ø30 mm, a 2 mm kerf, and material loss limited to the insert width.
Cutting external grooves
A 2 mm groove between shaft shoulders or a retaining ring groove at the end of a journal, up to 15 mm deep. Cut wider grooves with several adjacent passes.
Screw clamping from above
The BKTV M5x17 screw draws the flexible lip of the head against the insert. Change the insert with an AA4 key without removing the tool from the tool post.
Double-edged insert
MGMN 200 has a cutting edge at both ends. One edge dull? Rotate the insert by 180° and use the other.
Material loss: 2 mm
Each parting cut turns only 2 mm of bar into chips. For 100 parts, this consumes 10 cm less bar than a tool with a 3 mm insert.
Dimensions and cutting reach – dimensional drawing
Side view and top view
HEIGHT h
12 mm
WIDTH B
12 mm
LENGTH L
100 mm
DIMENSION S
12.3 mm
Measure T max from the insert tip to the point where the blade transitions into the wider head. Grooves up to 15 mm deep can also be cut in bars larger than Ø30 mm.
At the end of the cut, the insert tip is at the bar centerline and the shoulder of the head touches the bar surface. The second panel shows the cutting edge height: the edge must be on the centerline within ±0.1 mm. An edge below center leaves a pip; above center, it rubs against the material.
Decoding the BDKT R 1212 K2C T15 designation
Five elements of the Smoxh code, read from the left
Designation: BDKT R 1212 K2C T15
BDKT
Element 1
holder type
holder type
For parting
BDKT
BDKT
Smoxh series for external grooving and parting with screw clamping. The counterpart for internal grooving is designated BIKT.
R
Element 2
hand
hand
Right-hand
R
R
Standard configuration with the workpiece held in a chuck to the left of the tool. Version L is a mirror image – code SM09691.
1212
Element 3
shank
shank
12x12 mm
1212
1212
The first two digits indicate height h, and the next two indicate width B. Fits a tool post for 12 mm tools.
K2C
Element 4
insert pocket
insert pocket
MGM. 2C
K2C
K2C
K – Korloy MGMN insert system, 2 – cutting width of 2 mm. Versions K2C…K8C accept inserts from 2 to 8 mm.
T15
Element 5
depth
depth
T max 15 mm
T15
T15
Blade length from the insert tip to the head shoulder. Maximum parting diameter is 2 × T max = Ø30 mm.
Smoxh catalog convention, not ISO 5608 · dimensions: h 12 · B 12 · L 100 · S 12.3 mm
Parting data – speeds and feeds for a 2 mm insert
Starting values with coolant; refer to the insert grade data sheet for definitive data
The table provides starting values for coated MGMN 200 inserts with coolant. Select the upper speed range when clamping is rigid and tool overhang is short.
| Workpiece material | Vc [m/min] | fn [mm/rev] |
|---|---|---|
| PCarbon steel | 150–200 | 0.05–0.12 |
| PAlloy steel | 130–180 | 0.05–0.12 |
| PHardened steel | 90–130 | 0.05–0.10 |
| MStainless steel | 130–160 | 0.05–0.12 |
| KCast iron | 150–210 | 0.05–0.12 |
Starting spindle speed: n = (1000 × Vc) / (π × D). For a Ø30 mm carbon steel bar at Vc = 180 m/min: n = (1000 × 180) / (3.14 × 30) ≈ 1910 rpm. At constant spindle speed, the cutting speed decreases to zero at the centerline, so enable constant surface speed (G96) with a spindle speed limit on a CNC lathe.
▲
Operating limitations
Do not part off bars larger than Ø30 mm: the shoulder of the head will contact the material before the cutting edge reaches the centerline. Keep overhang from the tool post as short as possible. Over the final 2 mm before the centerline, reduce the feed by as much as 75% and direct coolant straight into the cut.
Installing the MGMN 200 insert in 3 steps
1Loosen
the BKTV M5x17 screw with the wrench AA4, 2–3 turns
2Seat
clean the pocket, slide the insert in until fully seated
3Tighten
and check that the cutting edge is on the lathe centerline ±0.1 mm
✓Ready
parting off bars up to Ø30 mm
Cutting insert not included
COMPATIBLE WITH:
| ✓ | MGMN 200 parting inserts (Smoxh: MGM. 2C) – width 2.0 mm, length 16 mm, height 3.5 mm |
| ✓ | BKTV M5x17 clamping screw (spare part) and AA4 wrench |
| ✓ | Left-hand version BDKT-L 1212 K2C T15 (SM09691) with the same dimensions |
Smoxh parting tools and boring bars for MGMN 200 inserts
BDKT R/L 1616 K2C T1816x16 mm | L 125 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 1616 K2C T1216x16 mm | L 125 mm | T max 12 mm | Ø24 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 1616 K2C T2116x16 mm | L 125 mm | T max 21 mm | Ø42 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 2020 K2C T1820x20 mm | L 125 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 2020 K2C T1220x20 mm | L 125 mm | T max 12 mm | Ø24 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 2525 K2C T1825x25 mm | L 150 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
BDKT R/L 3232 K2C T1832x32 mm | L 170 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
BIKT R/L 16 K2C T4Ø16 mm | Ømin 20 mm | L 150 mm | T max 4 mmR right-hand
←L left-hand
→
←L left-hand
→
BIKT R/L 20 K2C T6Ø20 mm | Ømin 26 mm | L 170 mm | T max 6 mmR right-hand
←L left-hand
→
←L left-hand
→
BIKT R/L 25 K2C T7Ø25 mm | Ømin 32 mm | L 200 mm | T max 7 mmR right-hand
←L left-hand
→
←L left-hand
→
Inserts from other grooving systems, such as DGN, GTN or KGM, do not fit the pocket. The 2 mm BDKT-R 1212 K2C T15 parting tool combines a 12x12 mm shank with quick insert replacement under a screw-clamped lip. Its 15 mm cutting depth and compatibility with MGMN 200 inserts make it a basic tool for parting and grooving bars up to Ø30 mm. In series production on automatic and CNC lathes, it parts off workpieces from bar stock in every cycle.
Frequently asked questions
An MGMN 200 parting insert (in the Smoxh catalog: MGM. 2C) with a width of 2.0 mm, length of 16 mm, and height of 3.5 mm. It is double-ended, so one insert provides two cutting edges. DGN, GTN, and KGM inserts do not fit this pocket.
Ø30 mm, which is twice the cutting depth T max = 15 mm. For thicker bars, choose the 1616 K2C T18 version (up to Ø36 mm) or T21 (up to Ø42 mm). Grooves shallower than 15 mm can also be cut on larger diameters.
The right-hand R version is standard: the workpiece is held in the chuck to the left of the tool. Choose the left-hand L version (code SM09691) when the workpiece is clamped on the opposite side of the tool or when the tool post arrangement on your lathe requires it. Both versions have identical dimensions.
A pip remains when the cutting edge is not on the lathe centerline. Set it within ±0.1 mm and check that the insert is fully seated in the pocket. Over the final 2 mm before the centerline, reduce the feed by as much as 75%.
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