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SK40 DIN 69871 shrink fit chuck 4.5° Ø3–32 mm

Kortools
Availability:
Select a variant to see available quantity pcs.
with VAT without VAT
Price €76.36
(incl. 23% VAT)

Shipping costs are not included in the price.

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Select a product variant:

Individual variants may differ in price

Select SK40-SF06-80 SK40-SF06-120 SK40-SF08-80 SK40-SF08-120 SK40-SF10-80 SK40-SF10-120 SK40-SF12-80 SK40-SF12-120 SK40-SF14-80 SK40-SF16-80 SK40-SF16-120 SK40-SF18-80 SK40-SF20-80 SK40-SF20-120 SK40-SF25-100 SK40-SF32-100 SK40-SF03-80 SK40-SF03-120 SK40-SF03-160 SK40-SF04-80 SK40-SF04-120 SK40-SF04-160 SK40-SF05-80 SK40-SF05-120 SK40-SF05-160 SK40-SF06-160 SK40-SF06-200 SK40-SF08-160 SK40-SF08-200 SK40-SF10-160 SK40-SF10-200 SK40-SF12-160 SK40-SF12-200 SK40-SF14-120 SK40-SF14-160 SK40-SF14-200 SK40-SF16-160 SK40-SF16-200 SK40-SF18-120 SK40-SF18-160 SK40-SF18-200 SK40-SF20-160 SK40-SF20-200 SK40-SF25-120 SK40-SF25-160 SK40-SF25-200 SK40-SF32-160 SK40-SF32-200 SK30-SF03-80 SK30-SF03-120 SK30-SF04-80 SK30-SF04-120 SK30-SF05-80 SK30-SF05-120 SK30-SF06-80 SK30-SF06-120 SK30-SF08-80 SK30-SF08-120 SK30-SF10-80 SK30-SF10-120 SK30-SF12-80 SK30-SF12-120 SK30-SF14-80 SK30-SF16-80 SK30-SF16-120 SK30-SF18-80 SK30-SF20-80
Click Available to show variants with 24h shipping


Product description

SK40 DIN 69871 shrink fit chuck 4.5°, Ø3–32 mm

Shrink fit chuck with an SK40 taper to DIN 69871. A cylindrical-shank tool is clamped without a collet: the heated bore of the chuck expands, the shank is inserted to the set depth, and as the chuck cools down it clamps the shank around its full circumference. The tool is removed after heating the chuck again. The clamping section has a 4.5° angle.

A shrink fit chuck requires an induction shrink fit unit: without heating, the tool cannot be inserted or removed. The shrink fit unit is not included.

Available for shank diameters from 3 to 32 mm in lengths from 80 to 200 mm, depending on the diameter: Ø3–5 up to 160 mm, Ø6–32 up to 200 mm (dimension table). Select the variant when purchasing. Diameters Ø3–5 mm have no stop screw thread (G “–” in the table).

Applications

  • clamping end mills, drills and reamers with cylindrical shanks, most often made of solid carbide
  • precise machining: holder runout ≤ 0.003 mm
  • high tool clamping force
  • machining in deep cavities: the slim clamping section reduces the risk of collision

Specification

Taper type SK40 (DIN 69871)
Tool clamping shrink fit, clamping section angle 4.5°
Tool shank diameter d 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 25 or 32 mm (depending on variant)
Tool shank cylindrical, tolerance h6, diameter equal to d of the variant
Length L 80–200 mm (depending on variant)
Holder runout ≤ 0.003 mm
Balance grade at least G6.3 (many pieces are balanced to G2.5 at 25,000 rpm: ask us and we will check the label of the specific piece)
Coolant AD or AD/B version, depending on the batch (central coolant supply; AD/B also through the flange)
Tool projection setting thread G for a stop screw in the bore (dimension table), adjustment range 10 mm; Ø3–5 without thread G (“–” in the table)
Tool insertion and removal induction shrink fit unit (not included)
Standard DIN 69871 (taper)

Balance grade: at least G6.3. Many shrink fit chucks of this series are balanced to G2.5 at 25,000 rpm (more precise). If you need G2.5 for high spindle speeds, write to us before purchasing — we will check the label of the specific piece before shipping.

Coolant: AD or AD/B version, depending on the batch. If your spindle supplies coolant through the flange (form B), write to us before purchasing.

Dimension table

Dimension drawing – SK40 DIN 69871 shrink fit chuck 4.5° Ø3–32 mm

Variant d [mm] D [mm] D1 [mm] L [mm] L2 [mm] L1 [mm] G
SK40-SF03-80 3 15 20 80 60.9 – –
SK40-SF03-120 3 15 20 120 100.9 – –
SK40-SF03-160 3 15 25 160 140.9 – –
SK40-SF04-80 4 15 20 80 60.9 – –
SK40-SF04-120 4 15 20 120 100.9 – –
SK40-SF04-160 4 15 25 160 140.9 – –
SK40-SF05-80 5 15 20 80 60.9 – –
SK40-SF05-120 5 15 20 120 100.9 – –
SK40-SF05-160 5 15 25 160 140.9 – –
SK40-SF06-80 6 21 27 80 60.9 36 M5
SK40-SF06-120 6 21 27 120 100.9 36 M5
SK40-SF06-160 6 21 32 160 140.9 36 M5
SK40-SF06-200 6 21 32 200 180.9 36 M5
SK40-SF08-80 8 21 27 80 60.9 36 M6
SK40-SF08-120 8 21 27 120 100.9 36 M6
SK40-SF08-160 8 21 32 160 140.9 36 M6
SK40-SF08-200 8 21 32 200 180.9 36 M6
SK40-SF10-80 10 24 31 80 60.9 42 M8×1
SK40-SF10-120 10 24 32 120 100.9 42 M8×1
SK40-SF10-160 10 24 34 160 140.9 42 M8×1
SK40-SF10-200 10 24 34 200 180.9 42 M8×1
SK40-SF12-80 12 24 31 80 60.9 47 M10×1
SK40-SF12-120 12 24 32 120 100.9 47 M10×1
SK40-SF12-160 12 24 34 160 140.9 47 M10×1
SK40-SF12-200 12 24 34 200 180.9 47 M10×1
SK40-SF14-80 14 27 34 80 60.9 47 M10×1
SK40-SF14-120 14 27 34 120 100.9 47 M10×1
SK40-SF14-160 14 27 42 160 140.9 47 M10×1
SK40-SF14-200 14 27 42 200 180.9 47 M10×1
SK40-SF16-80 16 27 34 80 60.9 50 M12×1
SK40-SF16-120 16 27 34 120 100.9 50 M12×1
SK40-SF16-160 16 27 42 160 140.9 50 M12×1
SK40-SF16-200 16 27 42 200 180.9 50 M12×1
SK40-SF18-80 18 33 40 80 60.9 50 M12×1
SK40-SF18-120 18 33 42 120 100.9 50 M12×1
SK40-SF18-160 18 33 50 160 140.9 50 M12×1
SK40-SF18-200 18 33 50 200 180.9 50 M12×1
SK40-SF20-80 20 33 40 80 60.9 52 M16×1
SK40-SF20-120 20 33 42 120 100.9 52 M16×1
SK40-SF20-160 20 33 50 160 140.9 52 M16×1
SK40-SF20-200 20 33 50 200 180.9 52 M16×1
SK40-SF25-100 25 44 50 100 80.9 58 M16×1
SK40-SF25-120 25 44 50 120 100.9 58 M16×1
SK40-SF25-160 25 44 50 160 140.9 58 M16×1
SK40-SF25-200 25 44 50 200 180.9 58 M16×1
SK40-SF32-100 32 44 50 100 80.9 62 M16×1
SK40-SF32-160 32 44 50 160 140.9 62 M16×1
SK40-SF32-200 32 44 50 200 180.9 62 M16×1

d – bore diameter (tool shank), D – chuck diameter at the front face, D1 – diameter at the base of the 4.5° clamping section, L – length from the flange face (spindle side) to the chuck front face, L2 – length from the front surface of the flange to the chuck front face, L1 – maximum shank insertion depth, G – thread of the stop screw for setting the tool projection (adjustment range 10 mm), N – stop screw adjustment range (10 mm), “–” – no thread and no L1 dimension.

Read the complete designation of the selected variant. For example, SK40-SF12-80 means an SK40 taper, a shrink fit chuck (SF) for a Ø12 mm shank and length L = 80 mm.

How to select

  • Check that the spindle has an SK40 interface (DIN 69871), not BT40.
  • Diameter d = tool shank diameter (e.g. an end mill with a Ø12 shank = variant SF12). The shank must be cylindrical, in tolerance h6.
  • A shorter chuck gives higher rigidity, the extended one (L = 120–200 mm) gives greater reach in deep cavities.
  • An induction shrink fit unit is needed to insert and remove the tool.

FAQ

Will it fit my machine?
The holder has an SK40 taper to DIN 69871. Before purchasing, confirm that the standard, size and pull stud match the machine spindle requirements. SK40 and BT40 are different tapers, so the designation “40” alone is not sufficient to confirm the selection.

Do I need a shrink fit unit?
A shrink fit chuck requires an induction shrink fit unit: without heating, the tool cannot be inserted or removed. The shrink fit unit is not included.

Which tools can be clamped?
Tools with a cylindrical shank in tolerance h6 and with a diameter equal to d of the selected variant, most often made of solid carbide. The insertion depth must not exceed L1 from the table.

How does it differ from an ER collet chuck?
A shrink fit chuck clamps the shank without a collet, around its full circumference, so it has low runout (≤ 0.003 mm) and a slim shape. An ER collet chuck covers different diameters by changing the collet and does not require a shrink fit unit.

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