- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
CUTTING WIDTH3 mm
CUTTING DEPTH T MAX18.5 mm
MAX. BAR DIAMETERØ37 mm
INSERT · 2 EDGESMGMN 300
Parting tool 16X16 3 mm T18.5 Varel
Technical data for the holder for Korloy MGMN 300 inserts
| Technical data | |
|---|---|
| Designation | MGEHR 1616-3 |
| Type | holder for parting and external grooving |
| Shank height h | 16 mm |
| Shank width B | 16 mm |
| Overall length L | 100 mm |
| Dimension S (to the insert edge) | 16.35 mm |
| Cutting depth T max | 18.5 mm |
| Max. parting diameter D max | Ø37 mm |
| Insert pocket | MGMN 300 (width 3 mm) |
| Hand | R – right-hand |
MGEHR 1616-3 – design and clamping of the 3 mm insert
What this tool can do, screw clamping and a double-edged insert
For parting off workpieces from bar stock and cutting external grooves, use 3 mm parting tool MGEHR 1616-3 by Varel. The holder accepts a double-edged MGMN 300 carbide insert with a width of 3 mm. The insert is clamped from above by the flexible lip of the head, tightened with a screw. You can replace it without removing the tool from the tool post.
The MGMN 300 insert has two cutting edges at opposite ends. When the first becomes dull, rotate the insert by 180° and use the second.
The insert is supported by the narrow blade of the head, 18.5 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 3 mm slot. This limits the tool to parting off bars up to Ø37 mm, or twice T max.
The dimension S = 16.35 mm means that the cutting edge projects 0.35 mm beyond the side of the 16 mm wide shank. This allows cutting close to the chuck jaws without the shank rubbing against the workpiece face. The 16x16 mm shank with a length of 100 mm fits tool posts on small and medium-sized lathes.
Applications of the 3 mm parting tool – parting off workpieces 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 Ø37 mm, a 3 mm kerf, and material loss limited to the insert width.
Cutting external grooves
A 3 mm groove between shaft shoulders or a retaining ring groove at the end of a journal, up to 18.5 mm deep. Cut wider grooves with several adjacent passes.
Screw clamping from above
The screw pulls the head's flexible lip down against the insert. The insert can be replaced without removing the tool from the tool post.
Double-edged insert
MGMN 300 has a cutting edge at both ends. One edge dull? Rotate the insert by 180° and use the other.
Material loss: 3 mm
Each parting cut turns only 3 mm of bar into chips. For 100 parts, this consumes 10 cm less bar than a tool with a 4 mm insert.
Dimensions and cutting reach – dimensional drawing
Side view and top view
HEIGHT h
16 mm
WIDTH B
16 mm
LENGTH L
100 mm
DIMENSION S
16.35 mm
Measure T max from the insert tip to the point where the blade transitions into the wider head. Grooves up to 18.5 mm deep can also be cut in bars larger than Ø37 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 MGEHR 1616-3 designation
The four parts of the MGT system designation, read from the left
Designation: MGEHR 1616-3
MGEH
Element 1
holder type
holder type
For parting
MGEH
MGEH
External grooving and parting holder for the MGT insert system, with screw-operated top clamping.
R
Element 2
hand
hand
Right-hand
R
R
Standard configuration with the workpiece clamped in the chuck to the left of the tool. The mirror-image version is designated MGEHL.
1616
Element 3
shank
shank
16x16 mm
1616
1616
The first two digits indicate height h, and the next two indicate width B. Fits a tool post for 16 mm tools.
-3
Element 4
insert width
insert width
3 mm
-3
-3
The number after the hyphen is the insert width in millimeters. The pocket accepts MGMN 300 inserts, and T max is 18.5 mm (bars up to Ø37 mm).
MGT system catalog convention, not ISO 5608 · dimensions: h 16 · B 16 · L 100 · S 16.35 mm
Parting data – speeds and feeds for a 3 mm insert
Starting values with coolant; refer to the insert grade data sheet for definitive data
The table provides starting values for coated MGMN 300 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 | 140–190 | 0.07–0.15 |
| PAlloy steel | 120–160 | 0.07–0.15 |
| PHardened steel | 60–120 | 0.07–0.12 |
| MStainless steel | 120–160 | 0.07–0.15 |
| KCast iron | 150–200 | 0.07–0.15 |
Starting spindle speed: n = (1000 × Vc) / (π × D). For a Ø37 mm carbon steel bar at Vc = 170 m/min: n = (1000 × 170) / (3.14 × 37) ≈ 1460 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 Ø37 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 300 insert in 3 steps
1Loosen
the clamping screw by 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 Ø37 mm
Cutting insert not included
COMPATIBLE WITH:
| ✓ | MGMN 300 parting inserts (Korloy MGT system) – width 3.0 mm, length 21 mm, height 4.8 mm |
| ✓ | Left-hand MGEHL 1616-3 version with the same dimensions |
| ✓ | Other sizes in the -3 series available: MGEHR 2020-3 (T max 18 mm), MGEHR 2525-3 (T max 18 mm) |
Varel parting tools and boring bars for MGMN 300 inserts
MGEHR/L 2020-320x20 mm | L 125 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
MGEHR/L 2525-325x25 mm | L 150 mm | T max 18 mm | Ø36 mmR right-hand
←L left-hand
→
←L left-hand
→
MGIVR/L 2520-3Ø20 mm | Ømin 25 mm | L 150 mm | T max 6 mmR right-hand
←L left-hand
→
←L left-hand
→
Inserts from other grooving systems, such as DGN, GTN or KGM, do not fit the seat. The 3 mm MGEHR 1616-3 parting tool machines carbon steel at a cutting speed of 140–190 m/min and a feed of 0.07–0.15 mm/rev. When parting off bars up to Ø37 mm, direct coolant into the cut and reduce the feed before reaching the centerline. It is suitable for toolrooms and one-off machining on CNC and conventional lathes.
Frequently asked questions
An MGMN 300 parting insert (Korloy MGT system) with a width of 3.0 mm, length of 21 mm and height of 4.8 mm. It is double-ended, so each insert provides two cutting edges. DGN, GTN and KGM inserts do not fit this pocket.
Ø37 mm, or twice the cutting depth T max = 18.5 mm. Larger bars require a holder with a greater cutting depth T max. Grooves shallower than 18.5 mm can also be cut on larger diameters.
Start at approximately 1460 rpm for carbon steel, at Vc = 170 m/min with a 3 mm insert. Cutting speed decreases closer to the centerline, so use G96 constant surface speed with a spindle speed limit on a CNC lathe. For stainless steel, use Vc 120–160 m/min.
No. The tool is sold without a cutting insert, and the MGMN 300 insert must be purchased separately. Inserts in different carbide grades fit the same holder, allowing one tool to machine steel, stainless steel and cast iron.
Product accessories
Reviews
No customer reviews for the moment.
Shipping
All orders are delivered by courier company GLS. For orders exceeding 369 PLN gross shipping is FREE
| Courier GLS | Przelew24 / Prepayment | 14,76 zł gross | Delivery time 1 working day |
| Courier GLS | Cash on delivery | 17,26 zł gross | Lead time 1 working day |
Recommended for you
Viewed products
This website uses its own and third-party cookies to improve our services and show you advertising related to your preferences by analyzing your browsing habits. To give your consent to its use, press the Accept button.
Cookie preferences
Functional cookiesTechnical
Functional cookies are strictly necessary to provide the services of the shop, as well as for its proper functioning, so it is not possible to refuse their use. They allow the user to browse through our website and use the different options or services that exist on it.
Advertising Cookies
These are cookies that collect information about the advertisements shown to users of the website. They can be anonymous, if they only collect information about the advertising spaces shown without identifying the user, or personalised, if they collect personal information about the user of the shop by a third party, for the personalisation of these advertising spaces.
Analytics cookies
Collect information about the user's browsing experience in the shop, usually anonymously, although sometimes they also allow the user to be uniquely and unequivocally identified in order to obtain reports on the user's interests in the products or services offered by the shop.