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  • MF168 40Cr hero 01
  • MF168 40Cr hero 02
  • MF168 40Cr hero 03
  • MF168 PL-EN 001 SNR0005K06-A12
  • MF168 PL-EN 002 SNR0006K06-A16
  • MF168 PL-EN 003 SNR0007J08
  • MF168 PL-EN 004 SNR0007K08
  • MF168 PL-EN 005 SNR0008K08
  • MF168 PL-EN 006 SNR0008K11
  • MF168 PL-EN 007 SNR0010K11
  • MF168 PL-EN 008 SNR0010M11-A16
  • MF168 PL-EN 009 SNR0012M11
  • MF168 PL-EN 010 SNR0013M16
  • MF168 PL-EN 011 SNR0013N16
  • MF168 PL-EN 012 SNR0014M16
  • MF168 PL-EN 013 SNR0014N16
  • MF168 PL-EN 014 SNR0016Q16
  • MF168 PL-EN 015 SNR0018Q16
  • MF168 PL-EN 016 SNR0020R16
  • MF168 PL-EN 017 SNR0020R16
  • MF168 PL-EN 018 SNR0020R22
  • MF168 PL-EN 019 SNR0025S16
  • MF168 PL-EN 020 SNR0025S22
  • MF168 PL-EN 021 SNR0032T16
  • MF168 PL-EN 022 SNR0032T22
  • MF168 PL-EN 023 SNR0040T16
  • MF168 PL-EN 024 SNR40U16
  • MF168 PL-EN 025 SNR0040T22
  • MF168 PL-EN 026 SNR0040U22
  • MF168 PL-EN 027 SNR50U16
  • MF168 PL-EN 028 SNL0008K08
  • MF168 PL-EN 029 SNL0010K11
  • MF168 PL-EN 030 SNL0012M11
  • MF168 PL-EN 031 SNL0013M16
  • MF168 PL-EN 032 SNL0013L11
  • MF168 PL-EN 033 SNL0014N16
  • MF168 PL-EN 034 SNL0016Q16
  • MF168 PL-EN 035 SNL0020R16
  • MF168 PL-EN 036 SNL0020R22
  • MF168 PL-EN 037 SNL0025S16
  • MF168 PL-EN 038 SNL0025S22
  • MF168 PL-EN 039 SNL0020R16
  • MF168 PL-EN 040 SNL0025S16
  • MF168 PL-EN 041 SNL0025R22
  • MF168 PL-EN 042 SNL0032T16

SNR/SNL 40Cr Internal Threading Boring Bar for IR/ER Inserts

Kortools
Main warehouse:
Select a variant to see available quantity pcs.
with VAT without VAT
Price €12.74

Shipping costs are not included in the price.

pcs.
Shipping time: 24 hours
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Individual variants may differ in price

Select SNR0005K06-A12 | right-hand / SNR | shank Ø12 mm | L=125 mm | 06IR | shim not confirmed SNR0006K06-A16 | right-hand / SNR | shank Ø16 mm | L=125 mm | 06IR | shim not confirmed SNR0007J08 | right-hand / SNR | shank Ø7 mm | L=110 mm | 08IR | shim not confirmed SNR0007K08 | right-hand / SNR | shank Ø7 mm | L=125 mm | 08IR | shim not confirmed SNR0008K08 | right-hand / SNR | shank Ø8 mm | L=125 mm | 08IR | shim not confirmed SNR0008K11 | right-hand / SNR | shank Ø8 mm | L=125 mm | 11IR | shim not confirmed SNR0010K11 | right-hand / SNR | shank Ø10 mm | L=125 mm | 11IR | shim not confirmed SNR0010M11-A16 | right-hand / SNR | shank Ø16 mm | L=150 mm | 11IR | shim not confirmed SNR0012M11 | right-hand / SNR | shank Ø12 mm | L=150 mm | 11IR | shim not confirmed SNR0013M16 | right-hand / SNR | shank Ø13 mm | L=150 mm | 16IR | shim not confirmed SNR0013N16 | right-hand / SNR | shank Ø13 mm | L=160 mm | 16IR | shim not confirmed SNR0014M16 | right-hand / SNR | shank Ø14 mm | L=150 mm | 16IR | shim not confirmed SNR0014N16 | right-hand / SNR | shank Ø14 mm | L=160 mm | 16IR | shim not confirmed SNR0016Q16 | right-hand / SNR | shank Ø16 mm | L=180 mm | 16IR | without shim SNR0018Q16 | right-hand / SNR | shank Ø18 mm | L=180 mm | 16IR | shim not confirmed SNR0020R16 | right-hand / SNR | shank Ø20 mm | L=200 mm | 16IR | with shim SNR0020R16 | right-hand / SNR | shank Ø20 mm | L=200 mm | 16IR | without shim SNR0020R22 | right-hand / SNR | shank Ø20 mm | L=200 mm | 22IR | shim not confirmed SNR0025S16 | right-hand / SNR | shank Ø25 mm | L=250 mm | 16IR | with shim SNR0025S22 | right-hand / SNR | shank Ø25 mm | L=250 mm | 22IR | shim not confirmed SNR0032T16 | right-hand / SNR | shank Ø32 mm | L=300 mm | 16IR | with shim SNR0032T22 | right-hand / SNR | shank Ø32 mm | L=300 mm | 22IR | with shim SNR0040T16 | right-hand / SNR | shank Ø40 mm | L=300 mm | 16IR | with shim SNR40U16 | right-hand / SNR | shank Ø40 mm | L=350 mm | 16IR | with shim SNR0040T22 | right-hand / SNR | shank Ø40 mm | L=300 mm | 22IR | shim not confirmed SNR0040U22 | right-hand / SNR | shank Ø40 mm | L=350 mm | 22IR | shim not confirmed SNR50U16 | right-hand / SNR | shank Ø50 mm | L=350 mm | 16IR | with shim SNL0008K08 | left-hand / SNL | shank Ø8 mm | L=125 mm | 08ER | shim not confirmed SNL0010K11 | left-hand / SNL | shank Ø10 mm | L=125 mm | 11ER | shim not confirmed SNL0012M11 | left-hand / SNL | shank Ø12 mm | L=150 mm | 11ER | shim not confirmed SNL0013M16 | left-hand / SNL | shank Ø13 mm | L=150 mm | 16ER | shim not confirmed SNL0013L11 | left-hand / SNL | shank Ø13 mm | L=140 mm | 11ER | shim not confirmed SNL0014N16 | left-hand / SNL | shank Ø14 mm | L=160 mm | 16ER | shim not confirmed SNL0016Q16 | left-hand / SNL | shank Ø16 mm | L=180 mm | 16ER | shim not confirmed SNL0020R16 | left-hand / SNL | shank Ø20 mm | L=200 mm | 16ER | shim not confirmed SNL0020R22 | left-hand / SNL | shank Ø20 mm | L=200 mm | 22ER | shim not confirmed SNL0025S16 | left-hand / SNL | shank Ø25 mm | L=250 mm | 16ER | shim not confirmed SNL0025S22 | left-hand / SNL | shank Ø25 mm | L=250 mm | 22ER | shim not confirmed SNL0020R16 | left-hand / SNL | shank Ø20 mm | L=200 mm | 16ER | with shim SNL0025S16 | left-hand / SNL | shank Ø25 mm | L=250 mm | 16ER | with shim SNL0025R22 | left-hand / SNL | shank Ø25 mm | L=200 mm | 22ER | with shim SNL0032T16 | left-hand / SNL | shank Ø32 mm | L=300 mm | 16ER | shim not confirmed
Click Available to show variants with 24h shipping


Opis produktu

SNR / SNL internal threading boring bars

42 verified variants • Ø7–Ø50 mm shanks • 06/08/11/16/22 insert systems • cutting insert sold separately

The SNR and SNL indexable boring bars in this listing are designed for turning internal threads inside a prepared bore. The range covers compact bars for small diameters and larger, more rigid holders for deeper bores and longer reach. Every variant has been checked separately for its symbol, shank diameter, overall length, insert system, screw and key.

This listing is for one tool holder only. The threading insert is not included and must match both the hand and the pocket size. The yellow-and-white variant card is the controlling specification for the selected option; if a general statement and a variant card differ, use the card for that exact option.

1. Application

The holder carries a threading insert inside the bore so that the thread can be generated on a lathe. It can be used on CNC or conventional lathes provided the machine tool block accepts the stated shank diameter and the workpiece geometry gives the bar safe access to the cutting zone.

  • internal threads in bushes, nuts, rings, housings and prepared technological bores
  • single-part, small-batch and production machining on lathes with external coolant supply
  • full-profile or partial-profile inserts selected for the required thread form, pitch and workpiece material
  • compact variants for small bores and larger shanks for increased clamping rigidity
  • right-hand SNR and left-hand SNL versions to suit the program, tool orientation and safe retraction path

The holder alone does not define the thread standard. Metric, inch, pipe, trapezoidal or other profiles are determined primarily by the selected threading insert. Before machining, also confirm the minimum bore required by the insert and holder nose, thread depth, relief groove and clearance for retracting the cutting edge.

Rigidity matters in internal turning

Use the largest shank that fits both the bore and the machine holder, and keep overhang only as long as necessary to reach the end of the thread. Excessive overhang can promote vibration, reduce surface quality and make the finished thread form less consistent.

2. SNR / SNL hand selection

The hand letter is part of the tool symbol. SNR identifies the right-hand family prepared for this listing, while SNL identifies the left-hand family. Do not choose the holder solely from whether the required thread itself is right- or left-hand. Consider tool orientation, approach side, feed direction, spindle rotation and the safe exit path.

FamilyHolder handInsert system in this listingPrimary check
SNRright-handIRedge position versus tool orientation and programmed feed
SNLleft-handERwhether the mirrored geometry gives the required cutting and retract direction

The IR and ER designations above follow the verified specifications for this range. They must not be swapped automatically even when the numerical size is the same. The insert must fit the pocket, screw hole, support surface and cutting-edge orientation.

If the previous holder has a legible symbol, compare it character by character with the selected option. If no symbol is available, record at least the clamped shank diameter, required reach, hand, insert size and the orientation of the cutting edge in the machine.

3. Specification

ParameterValue
Tool typeIndexable boring bar / holder for internal thread turning
ApplicationCNC and conventional lathes; cutting threads inside a bore
FamiliesSNR – right-hand; SNL – left-hand
Insert clampingCentral screw; the S symbol identifies screw clamping
Holder material40Cr steel
Nominal family rangeØ5–Ø50 mm
Actual shank diameter in available variantsØ7–Ø50 mm
Overall length110–350 mm, depending on variant
Insert systems for SNR06IR, 08IR, 11IR, 16IR or 22IR
Insert systems for SNL08ER, 11ER, 16ER or 22ER
Clamping screwsM2.2 × 6, M2.5 × 6, M2.5 × 7, M3.5 × 10, M3.5 × 12 or M4 × 14
KeysTorx T6, T8 or T15 – the exact size is printed on the variant card
ShimVariant-specific: supplied with a shim, without a shim, or not confirmed
Cutting insert includedNo – select and purchase the insert separately
Prepared variants42: 27 right-hand and 15 left-hand

The two smallest variants use an adapter-style design: the nominal working section is 5 or 6 mm while the clamped shank is Ø12 or Ø16 mm. For these options, never infer the machine-clamping diameter from the first numerical block alone; read the variant card.

Length letters J, K, L, M, N, Q, R, S, T and U identify length groups, but purchasing decisions should use the stated metric overall length. The prepared set spans 110 to 350 mm. The same shank diameter may be offered in more than one length or for more than one insert size.

4. Insert systems and available range

The table below groups the prepared options by holder hand and insert system. It is a selection map, not a replacement for the exact variant card. Shank and overall-length ranges refer only to the options verified for this listing.

FamilyHandInsertShank rangeOverall lengthVariants
SNLleft-hand08ERØ8 mm125 mm1
SNLleft-hand11ERØ10–Ø13 mm125–150 mm3
SNLleft-hand16ERØ13–Ø32 mm150–300 mm8
SNLleft-hand22ERØ20–Ø25 mm200–250 mm3
SNRright-hand06IRØ12–Ø16 mm125 mm2
SNRright-hand08IRØ7–Ø8 mm110–125 mm3
SNRright-hand11IRØ8–Ø16 mm125–150 mm4
SNRright-hand16IRØ13–Ø50 mm150–350 mm13
SNRright-hand22IRØ20–Ø40 mm200–350 mm5

Understanding the insert size

The final number 06, 08, 11, 16 or 22 identifies the insert-size family that fits the pocket. It does not by itself define the thread profile or pitch. A 16IR insert, for example, is available in different profiles and carbide grades; only the complete insert designation establishes the thread and workpiece application.

When selecting an insert, check the IR or ER orientation, size 06/08/11/16/22, profile angle, pitch range, full or partial profile, carbide grade and intended workpiece material. The clamping-screw size is not an insert designation and should never be the only compatibility test.

5. Reading the holder code

The symbol consists of six logical parts. Shown with separators for clarity, the structure is S · N · R/L · diameter · length letter · insert size. This explains the tool function without publishing a static list of every SKU inside the description.

Code partMeaningWhat to verify
Sscrew-clamped insertcomplete screw and pocket for the selected option
Ninternal-thread toolclearance between the bar nose and the smallest bore
R or Lright- or left-hand holdertool-block orientation, feed and retract path
diameter digitsnominal bar diameteractual clamped shank on the card; adapter variants are exceptions
J–Ulength codemetric overall length and required reach
06–22insert-size systemIR/ER orientation, profile, pitch and carbide grade

An added A12 or A16 suffix identifies a version with a larger clamping shank than the nominal working-section diameter. For these tools the variant card is the mandatory reference for the diameter clamped in the machine.

6. Clamping parts and package contents

Each option is one holder. The cutting insert is sold separately. The verified variant data confirms the screw and key for each option, but shim status is not uniform across the range: several options explicitly state with or without a shim, while other options do not provide enough evidence to generalise.

ScrewKeyInsert systems encounteredTypical shank rangeRule
M2.2 × 6T606IR, 08ER, 08IRØ7–Ø16 mmcheck the selected variant card
M2.5 × 6T808IRØ7 mmcheck the selected variant card
M2.5 × 7T811ER, 11IR, 16ERØ8–Ø16 mmcheck the selected variant card
M3.5 × 10T1516ER, 16IRØ13–Ø20 mmcheck the selected variant card
M3.5 × 10T816ERØ16–Ø20 mmcheck the selected variant card
M3.5 × 12T1516ER, 16IRØ25–Ø50 mmcheck the selected variant card
M4 × 14T1516IR, 22ER, 22IRØ20–Ø40 mmcheck the selected variant card
  • the threading insert is not included; purchase one matching the system printed on the card
  • do not assume a shim is supplied when the variant card does not confirm it
  • replacement screws must match diameter, length and drive; an overlong screw may bottom out
  • use the key stated for the exact option; T6, T8 and T15 are not interchangeable
  • before tightening, clean the pocket and verify that the insert is fully seated without trapped chips

We do not publish a universal tightening torque because no verified torque table is available for this family. Follow the technical recommendations for the clamping component, do not extend the key and replace any screw with a damaged Torx drive.

7. Variant selection step by step

  1. Measure the finished bore and establish the minimum working diameter required by both the insert and the holder nose. Shank diameter alone does not prove the bar will clear the bore.
  2. Determine holder hand from tool orientation, spindle rotation, feed direction and the thread exit. If uncertain, compare with the previous holder or run a machine simulation.
  3. Choose the largest shank that fits the machine block and bore. Greater rigidity generally helps control vibration in internal turning.
  4. Select an overall length that reaches the end of the thread while avoiding unnecessary overhang.
  5. Select the IR system for the prepared SNR options or the ER system for the prepared SNL options, then choose size 06, 08, 11, 16 or 22.
  6. Read the exact screw, key and shim status on the variant card. This is essential where two options share the same basic symbol but declare different package configurations.
  7. Select the insert profile and carbide grade separately for the thread standard, pitch and workpiece material. The holder cannot replace that process decision.

Checks before the first cut

Clamp as much of the shank as practical, set the edge on centre height and manually check clearance through the smallest bore section. Simulate the path, verify the relief groove and make a light proving pass before full-depth threading. Cutting data must come from the selected insert, not from the holder alone.

8. FAQ

Is the threading insert included?
No. The listing is for one holder; the matching IR or ER threading insert is purchased separately.

What is the difference between SNR and SNL?
In this range SNR is the right-hand holder and SNL is the left-hand holder. Select hand from machine orientation, feed direction and the required retract path.

Does every SNR holder use a 16IR insert?
No. The range also includes 06IR, 08IR, 11IR and 22IR systems. The final size block and the variant card identify the correct family.

Why can nominal diameter differ from shank diameter?
Two compact adapter versions use an A12 or A16 shank. Their working section is smaller, while the section clamped in the machine is Ø12 or Ø16 mm.

Is a shim always supplied?
No single answer applies to every option. Some variants explicitly state with or without a shim; other options are marked as not confirmed on their card.

Can I use an insert from another brand?
A dimensionally compatible IR/ER insert may be considered, but check the screw hole, support surface, cutting-edge orientation and complete seating before machining.

Which length should I choose?
Choose enough reach to finish the thread with the shortest practical overhang. A longer bar is not automatically better and may be more prone to vibration.

How do I select thread profile and workpiece material?
Use the complete insert designation. The insert determines profile, pitch range and carbide grade for steel, stainless steel, cast iron or non-ferrous materials.

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