- 98% satisfied customers
- 72h delivery
- 30 dni na zwrot
Description
22 IR 4 ISO internal metric threading insert
Technical data for the full-profile insert for 4 mm pitch
| Technical data | |
|---|---|
| Designation | 22 IR 4 ISO HTA |
| Brand / part number | Horn / 14937 |
| Type | internal threading insert, right-hand |
| Profile | full, ISO metric, 60° angle |
| Pitch | 4 mm |
| Infeed depth | 2.31 mm |
| Thread tolerance class | 6H |
| Insert size | 22: edge 22 mm, IC 12.7 mm |
| Cutting edges | 3 |
| Tool holders | right-hand internal SIR, size 22, holes from Ø24 mm |
| Grade | HTA: submicron carbide, PVD TiAlN |
Pitch4 mm
Profilefull ISO
Infeed depth2.31 mm
Tool holdersSIR 22
22 IR 4 ISO internal metric threading insert turns the full internal thread profile with a pitch of 4 mm: flanks, root and crests. It can cut coarse threads M36 and M39 as well as metric fine threads from M42 × 4 to M80 × 4 in holes from Ø24 mm. It works in size 22 right-hand SIR boring bars. It has three corners for successive use.
Full ISO profile – flanks, root and thread hole diameter
The insert finishes the thread crests in the same cycle
This insert
22 IR 4 ISO – full profile
Crests trimmed to diameter D1.
Comparison
Partial profile, e.g., 22 IR N60
The crests remain as produced by boring the hole.
Axial cross section of an M36 thread after the final pass. Gold highlights the insert; the red line marks the surfaces machined by the insert.
A full-profile threading insert has short cutting edges on both sides of the tooth. During the final passes, they trim the thread crests to the hole diameter, which is the thread minor diameter D1. The insert therefore turns both the groove and the hole diameter itself, with a crest flat equal to 1/4 of the pitch, or approx. 1.00 mm.
For an M36 thread in the 6H tolerance zone, the hole diameter is 31.670–32.270 mm and the pitch diameter is 33.402–33.702 mm. Bore the hole slightly undersize beforehand. An oversized hole will leave the crests unmachined and produce a profile that is too shallow. Check the finished thread with a thread plug gauge or screw.
This insert
22 IR 4 ISO full profile
The insert turns the flanks, root and crests of a thread with a 4 mm pitch. The crest is formed in the same cycle as the flanks, ensuring a repeatable profile in production runs.
Choose for: production runs of threads with a single pitch.
Comparison
Partial profile, e.g., 22 IR N60
The insert machines the flanks and root of the groove over a pitch range of 3.5–5.0 mm. It does not touch the crests: they retain the previously turned diameter.
Choose for: short runs and various pitches.
How the 22 IR 4 ISO insert cuts threads – passes, feed and cutting data
Feed of 4 mm per revolution and 10–20 progressively shallower passes
Schematic illustration: an insert in a right-hand SIR boring bar inside the workpiece bore. The insert is highlighted in gold.
One spindle revolution – 4 mm of feed
The workpiece rotates while the boring bar with the insert moves along the hole axis by 4 mm per spindle revolution. In a typical setup, the right-hand insert feeds toward the chuck and turns a right-hand thread. During the final passes, its side cutting edges trim the crests to the hole diameter.
Schematic illustration of the passes for an M36 thread. The lines show successive cutting edge positions.
Successive passes to an infeed depth of 2.31 mm
The insert reaches the total infeed depth of 2.31 mm in 10–20 passes; start with 15. The first pass removes the most material, and the final pass removes 0.05–0.08 mm. Use flank infeed at an angle of 29–30° to the radial direction: the insert then cuts mainly on one flank.
In a blind hole, make a relief groove at the end of the thread at least 4.2 mm wide and no shallower than the infeed depth.
Cutting speed for HTA grade
HTA grade is a submicron carbide with a PVD TiAlN coating for steel, stainless steel and cast iron. The speeds in the table apply to thread turning.
| Workpiece material | Cutting speed vc [m/min] |
|---|---|
| P Unalloyed steel, cast steel, free-cutting steel | 120–180 |
| P Low-alloy steel and cast steel (up to 5% alloying elements) | 80–130 |
| P High-alloy and tool steel | 60–80 |
| M Stainless steel and stainless cast steel | 90–130 |
| K Gray cast iron | 120–130 |
| K Ductile and malleable cast iron | 100–130 |
Spindle speed and feed for M36
Pitch P is measured along the axis between corresponding points on adjacent thread turns.
For each spindle revolution, the insert advances by one pitch: fn = P = 4 mm/rev.
Example: M36 in a hole in low-alloy steel, vc = 100 m/min
n = 1000 × vc / (π × d) = 1000 × 100 / (π × 36) ≈ 880 rpm
vf = n × P = 880 × 4
3520 mm/min
feed rate
d – thread diameter (36 mm), n – spindle speed, vc – cutting speed from the middle of the range in the table, vf – feed rate.
Calculate the helix angle β using the formula tan β = P / (π × d), where P is the pitch and d is the thread diameter. For M36: 4 / (π × 36) = 0.035, giving β ≈ 2.03°. Standard threading holder shims tilt the insert by 1–1.5°. This thread has a larger angle, so select a shim with a tilt closer to 2° using the holder manufacturer's table.
Internal threads with a pitch of 4 mm – from M36 to M300 × 4
One insert, many diameters with the same pitch
Hole diameters shown at the same scale. The tooth profile and thread depth are the same for each.
The pitch and tooth profile do not depend on diameter. The infeed depth for an internal thread with a pitch of 4 mm is always 2.31 mm, for both M42 × 4 and M80 × 4. The hole in the workpiece, rather than the insert, determines the thread diameter.
The 22 IR 4 ISO insert can cut M36 and M39 coarse threads and every fine thread with a 4 mm pitch listed in the PN-ISO 261 table in holes from Ø24 mm.
| Group according to PN-ISO 261 | Internal thread sizes with a pitch of 4 mm |
|---|---|
| Coarse threadstandard pitch 4 mm | M36M39 |
| Fine threads – preference 1use as the first choice | M42M48M56M64M72M80× 4 |
| Fine threads – preference 2when the size is unavailable in preference 1 | M45M52M60M68M76× 4 |
| Fine threads – preference 3when the size is unavailable in preferences 1 and 2 | M55M58M62M65M70M75× 4 |
| Above M80diameters up to 300 mm | in the standard's table up to M300 × 4 |
M36 is highlighted in gold – the thread used in the drawings and calculation example in this description.
Decoding the 22 IR 4 ISO designation – element by element
Size, operating hand, pitch, profile and grade in the insert designation, holder selection
Dimensions according to catalogs for inserts of this standard. Enlarged corner detail.
22 IR 4 ISO insert dimensions
Size 22 denotes an edge length of 22 mm and an inscribed circle IC of 12.7 mm, or 1/2 inch; it is not the thread diameter. Dimensions X = 1.6 mm and Y = 2.3 mm specify the position of the cutting tip relative to the sides of the insert. The corner reproduces the ISO internal thread profile: a 60° angle, a root width of 1/8 of the pitch and a crest width of 1/4 of the pitch in the nominal profile.
22
Insert size
Edge 22 mm, IC 12.7 mm.
I
Internal thread
Turning inside holes with a boring bar.
R
Right-hand version
SIR boring bar, feed toward the chuck.
4
Thread pitch
4 mm; one insert for one pitch.
ISO
Metric profile
Angle 60°, full profile, class 6H.
HTA
Carbide grade
Submicron, PVD TiAlN, P20–P40 and K20–K30.
Only for a pitch of 4 mm and internal threads
The insert profile fits only one pitch. At a different feed, the insert flanks will not align with the thread flanks, producing a distorted thread. A boring bar for size 22 inserts fits holes from Ø24 mm – this determines the smallest thread.
Mount the threading insert in right-hand SIR boring bars for size 22 inserts, e.g., SIR 0020 P22, SIR 0025 R22 or SIR 0032 S22. A right-hand internal threading insert works only in a right-hand boring bar.
The 22 IR 4 ISO internal metric threading insert finishes an internal thread with a 4 mm pitch, including the crests, without a separate finish-boring operation. A single insert cuts more than 10 sizes listed in the standard's table, from M36 to M80 × 4, always with the same infeed depth of 2.31 mm. It is suitable for production runs that require a repeatable profile.
22 IR 4 ISO – questions about selection and use
Key information before selecting an insert
You can cut all internal metric threads with a 4 mm pitch in holes from Ø24 mm: M36 and M39 coarse threads and fine threads listed in the PN-ISO 261 table from M42 × 4 to M80 × 4.
Yes. The full profile trims the thread crests to the hole diameter, e.g. to 31.670–32.270 mm for M36 in the 6H tolerance zone. Simply bore the hole slightly undersize beforehand.
The total insert infeed depth for an internal thread is approx. 0.58 × P, or approx. 2.31 mm for a pitch of 4 mm. It is the same for every diameter with this pitch.
For right-hand SIR boring bars for size 22 inserts, e.g., SIR 0020 P22 (holes from Ø24 mm), SIR 0025 R22 (from Ø29 mm) or SIR 0032 S22 (from Ø38 mm).
Usually 10 to 20 passes; start with 15. For harder materials, add passes instead of increasing the cutting speed.
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
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.