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Description
SHANK20 mm
BLADE26 mm
SLOT4.1 mm
VERSIONNeutral
SMLK 20-26 parting blade block – technical data
Smoxh holder dimensions and specifications
| Technical data | |
|---|---|
| Type | SMLK 20-26 |
| Ordering code | SM54875 |
| Shank height (H2) | 20 mm |
| Blade height (H) | 26 mm |
| Slot width (B) | 4.1 mm |
| Length (L) | 86 mm |
| Overall height (H3) | 43 mm |
| Clamping jaw | SMK1-075 |
| Clamping screws | M6x28, 5 mm hex key |
| Design | neutral |
| Manufacturer | Smoxh |
Lathe parting holder – design and applications
How the block works with a parting blade
Parting tool block SMLK 20-26 turns the lathe tool post into a stable parting setup. Mount it once, then adjust the cutting reach by extending the parting blade.
Prismatic slot 4.1 mm
Guides the 26 mm high parting blade along the full length of the body.
Clamping with M6x28 screws
The SMK1-075 upper jaw clamps the blade evenly, without localized stresses.
Neutral version
Cuts to the right and left — simply reverse the blade in the slot.
✓Less vibration during deep cuts — longer support than in the tool post
✓Adjust the overhang without removing the block from the lathe
✓20 mm shank — quick-change and four-way tool posts
SMLK 20-26 block dimensions
Dimensional drawing and complete dimension table
LENGTH L
86 mm
HEIGHT H3
43 mm
BASE L2
38 mm
SLOT B
4.1 mm
| Dimension | Designation | Value |
|---|---|---|
| Blade height | H | 26 mm |
| Blade height below the pocket | H1 | 21.4 mm |
| Shank height | H2 | 20 mm |
| Overall height | H3 | 43 mm |
| Lower projection | H4 | 9 mm |
| Length | L | 86 mm |
| Undercut length | L1 | 21 mm |
| Base length | L2 | 38 mm |
| Slot width | B | 4.1 mm |
SMLK series – five block sizes
Selecting a block for the tool post and blade
Sizes in the SMLK series
| Type | Shank | Blade | Length | Status |
|---|---|---|---|---|
| SMLK 20-26 | 20 mm | 26 mm | 86 mm | THIS PRODUCT |
| SMLK 20-32 | 20 mm | 32 mm | 100 mm | |
| SMLK 25-26 | 25 mm | 26 mm | 110 mm | |
| SMLK 25-32 | 25 mm | 32 mm | 110 mm | |
| SMLK 32-32 | 32 mm | 32 mm | 110 mm |
The first number in the designation is the shank height; the second is the blade height. Blocks for 26 mm blades have a 4.1 mm slot; those for 32 mm blades have a 5.3 mm slot.
Smoxh blades compatible with the SMLK 20-26 block
The block accepts Smoxh SML 26 series blades — height 26 mm, length 110 mm. The last digit of the code indicates the cutting width in mm. Select the series to match the insert system you already use.
| Insert system | Width 2 mm | Width 3 mm | Width 4 mm |
|---|---|---|---|
| MGMN inserts | SML 26 K2C | SML 26 K3C | SML 26 K4C |
| SP inserts | SML 26 SP 2C | SML 26 SP 3C | SML 26 SP 4C |
| TDC inserts | SML 26 TDC2C | SML 26 TDC3C | SML 26 TDC4C |
| TDP inserts | SML 26 YG2C | SML 26 YG3C | SML 26 YG4C |
| DGN inserts | SML 26 ID2C | SML 26 ID3C | — |
| GRIP inserts | — | — | SML 26 IG4C |
| ZT inserts | — | SML 26 ZT3C | SML 26 ZT4C |
| 123 inserts | SML 26 123-2C | SML 26 123-3C | SML 26 123-4C |
| 151.2 inserts | SML 26 151.2-2C | SML 26 151.2-3C | SML 26 151.2-4C |
| RD inserts | SML 26 RD2C | SML 26 RD3C | SML 26 RD4C |
Blades with MGMN inserts part off bars up to Ø39 mm (width 2–3 mm) or up to Ø80 mm (width 4 mm).
Installing the blade in the block – three steps
From tool post to a ready-to-use setup
Installation step by step
1Seat the block
shank: 20 mm
2Insert the blade
slot: 4.1 mm
3Tighten the screws
screws: M6x28
✓Set the overhang
as short as possible
After every change in workpiece diameter, adjust the blade overhang and check screw clamping.
How far should the blade extend?
Overhang ≈ D/2 + 2–3 mm allowance. For a Ø39 mm bar: 39 ÷ 2 + 3 ≈ 23 mm — this blade length beyond the block jaw is sufficient to cut to the centerline. Every additional millimeter of overhang reduces rigidity.
Compatibility and working range
What fits the SMLK 20-26 block
✓ Parting blades with a height of 26 mm — 26 Smoxh SML 26 versions (MGMN, SP, TDC and other inserts)
✓ Tool posts that accept a shank with a height of 20 mm
▲ Deep grooving — use a cycle with retraction to evacuate chips
✗ Blades with a height of 32 mm — select the SMLK 20-32 or 25-32 block
Blade overhang and cooling
Set the minimum overhang that allows the workpiece to be parted off — excess overhang reduces rigidity and causes vibration. When parting through solid material, direct coolant into the cutting gap and reduce the feed before breakthrough.
The SMLK 20-26 parting blade block is the foundation of a parting setup on a general-purpose lathe with a 20 mm tool post. One body accommodates 26 parting blades with a height of 26 mm — from MGMN inserts to the 151.2 system — so cutting width and geometry are changed by replacing the blade rather than the entire holder. The maximum parting diameter depends on the blade: with a 4 mm MGMN blade, it reaches Ø80 mm.
Frequently asked questions
The SMLK 20-26 parting blade block accepts all Smoxh SML 26 series blades — height 26 mm, length 110 mm. This includes 26 versions in 10 insert systems, including MGMN, SP, TDC and 151.2, with cutting widths of 2–4 mm.
The block shank is 20 mm high and fits quick-change and four-way tool posts. For a 25 mm slot, select SMLK 25-26 or 25-32; for a 32 mm slot, select SMLK 32-32.
It depends on the installed blade: MGMN blades with a width of 2–3 mm part off bars up to Ø39 mm; a 4 mm blade handles bars up to Ø80 mm. Set the blade overhang to approximately D/2 + 2–3 mm allowance.
Yes. The design is neutral — change the cutting direction by reversing the blade in the slot. The block remains clamped in the tool post.
Product accessories
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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 |
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