Tool Holders

Tool holders are defined as a mechanical or structural system used to securely hold, align, and support tools, dies, or molds in manufacturing processes, ensuring stability, precision, and efficient force or energy transfer. Tool holders are mainly used in classical machining operation but the concept is frequently extended to other tool based industries such as cold working, hot working and plastic processing, where tool holders broadly describe systems that support and fix functional tooling components.

Tool holders are precision interfaces used in machining to secure cutting tools and transfer torque, feed forces, and rotational accuracy from the machine spindle to the tool. They play a critical role in stability, runout control, and vibration reduction. Common systems include HSK (hollow‑shank tool holder system), BT-taper, CAT(American steep taper concept), SK (German steep taper), and straight‑shank holders, depending on machine type and speed. Materials typically involve alloy steels and alloyed tool steels, case‑hardened tool steels, and balanced designs for high‑speed machining. Tooling configurations range from collet chucks, hydraulic and shrink‑fit holders to modular systems and indexable tool bodies. Clamping technologies determine rigidity—shrink‑fit holders offer high concentricity, hydraulic holders provide damping, and collet systems allow flexibility. Tool holders must maintain precise taper contact, dynamic balance, and coolant delivery through channels or ports. Applications include milling, drilling, reaming, tapping, and high‑performance CNC machining in automotive, aerospace, mouldmaking, energy, and general industrial manufacturing, where accuracy and repeatability are essential.

Related Products

  • BÖHLER E185AMPO

    The newly developed, patent pending, BÖHLER E185 AMPO is an AM powder, fulfilling the highest demands from various industries, ranging from motorsport to engineering components and any kind of prototype applications. This low alloyed steel with easy printability and the possibility for surface treatments (e.g. case hardening or nitriding) was developed especially for the demands of the 3D printing industry. The material shows an excellent combination of strength and toughness.

    Read More
    • Additive Manufacturing Application
    • Market grade BÖHLER patent

    The newly developed, patent pending, BÖHLER E185 AMPO is an AM powder, fulfilling the highest demands from various industries, ranging from motorsport to engineering components and any kind of prototype applications. This low alloyed steel with easy printability and the possibility for surface treatments (e.g. case hardening or nitriding) was developed especially for the demands of the 3D printing industry. The material shows an excellent combination of strength and toughness.

    Read More
  • BÖHLER K460

    BÖHLER K460 corresponds to the material 1.2510 (100MnCrW4, O1) and has comparable properties to the popular tool steel 1.2842. Additional alloying with tungsten achieves higher resistance to abrasive wear compared to the tool steel 1.2842. BÖHLER K460 offers the advantage of simple heat treatment with low hardening temperatures and single tempering. However, this characteristic tempering behaviour limits the use of advanced coatings. The material has a good hardening response, but only moderate through hardenability. BÖHLER K460 is used for punching and cutting tools, plastic molds, thread cutting tools and machine knives in the wood, paper and recycling industries.

    BÖHLER K460

    Compressive strength
    Dimensional stability in heat treatment
    Toughness
    Wear resistance abrasive
    Wear resistance adhesive
    Read More
    • Cold Work
    • AISI O1
    • EN 100MnCrW4
    • JIS ~SKS3
    • SEL 1.2510
    • UNS T31501
    • ASTM A681
    • EN ISO 4957

    BÖHLER K460 corresponds to the material 1.2510 (100MnCrW4, O1) and has comparable properties to the popular tool steel 1.2842. Additional alloying with tungsten achieves higher resistance to abrasive wear compared to the tool steel 1.2842. BÖHLER K460 offers the advantage of simple heat treatment with low hardening temperatures and single tempering. However, this characteristic tempering behaviour limits the use of advanced coatings. The material has a good hardening response, but only moderate through hardenability. BÖHLER K460 is used for punching and cutting tools, plastic molds, thread cutting tools and machine knives in the wood, paper and recycling industries.

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  • BÖHLER K720

    BÖHLER K720 is corresponds to the material 1.2842 (90MNCRV8, ~O2). This material is suitable for simple heat treatment with low hardening temperatures and single tempering. However, this characteristic tempering behaviour limits the use of advanced coatings. The material has a good hardening response, but only moderate through hardenability. BÖHLER K720 is used for punching and cutting tools, plastic molds, thread cutting tools and machine knives in the wood, paper and recycling industries.

    BÖHLER K720

    Compressive strength
    Dimensional stability in heat treatment
    Toughness
    Wear resistance abrasive
    Wear resistance adhesive
    Read More
    • Cold Work
    • AISI ~O2
    • EN 90MnCrV8
    • SEL 1.2842
    • UNS ~T31502
    • EN ISO 4957

    BÖHLER K720 is corresponds to the material 1.2842 (90MNCRV8, ~O2). This material is suitable for simple heat treatment with low hardening temperatures and single tempering. However, this characteristic tempering behaviour limits the use of advanced coatings. The material has a good hardening response, but only moderate through hardenability. BÖHLER K720 is used for punching and cutting tools, plastic molds, thread cutting tools and machine knives in the wood, paper and recycling industries.

    Read More
  • BÖHLER M238

    BÖHLER M238 is a prehardened, non-corrosion-resistant plastic mould steel with good machinability. The addition of Ni guarantees uniform strength across the entire cross-section, even with large dimensions (up to 600 mm).

    BÖHLER M238

    Etchability
    Machinability in as supplied condition
    Polishability
    Through-hardenable
    Toughness
    Wear resistance
    Read More
    • Plastic Mould
    • EN 40CrMnNiMo8-6-4
    • SEL 1.2738
    • EN ISO 4957

    BÖHLER M238 is a prehardened, non-corrosion-resistant plastic mould steel with good machinability. The addition of Ni guarantees uniform strength across the entire cross-section, even with large dimensions (up to 600 mm).

    Read More
  • BÖHLER M238 Highhard

    BÖHLER M238HH corresponds to BÖHLER M238 in High-Hard product variant. A variation in the heat treatment enables significantly higher wear resistance and edge-stability for improved tool life.

    BÖHLER M238 Highhard

    Etchability
    Machinability in as supplied condition
    Polishability
    Through-hardenable
    Toughness
    Wear resistance
    Read More
    • Plastic Mould
    • EN 40CrMnNiMo8-6-4
    • SEL 1.2738
    • EN ISO 4957

    BÖHLER M238HH corresponds to BÖHLER M238 in High-Hard product variant. A variation in the heat treatment enables significantly higher wear resistance and edge-stability for improved tool life.

    Read More
  • BÖHLER M314

    BÖHLER M314 is a prehardened, corrosion-resistant martensitic plastic mold steel which, due to its chemical composition, has very good machinability and uniform strength over the entire cross-section.

    BÖHLER M314

    Corrosion resistance
    Machinability in as supplied condition
    Polishability
    Toughness
    Wear resistance
    Read More
    • Plastic Mould
    • EN X33CrS16
    • SEL 1.2085

    BÖHLER M314 is a prehardened, corrosion-resistant martensitic plastic mold steel which, due to its chemical composition, has very good machinability and uniform strength over the entire cross-section.

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  • BÖHLER M315

    BÖHLER M315 is a prehardened, corrosion-resistant martensitic plastic mold steel. Due to its chemical composition, BÖHLER M315 has improved machinability compared to 1.2085 and is approved for food contact.

    BÖHLER M315

    Corrosion resistance
    Machinability in as supplied condition
    Polishability
    Toughness
    Wear resistance
    Read More
    • Plastic Mould
    • SEL ~1.2099

    BÖHLER M315 is a prehardened, corrosion-resistant martensitic plastic mold steel. Due to its chemical composition, BÖHLER M315 has improved machinability compared to 1.2085 and is approved for food contact.

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  • BÖHLER M789 AMPO

    BÖHLER M789 AMPO is a newly developed maraging steel, which combines the mechanical properties of 1.2709 with the corrosion resistance of 17-4PH. This patent bending grade can easily printed without any preheating and achieves a hardness of about 52 HRC with a very easy heat treatment. Furthermore, this material shows an excellent polishability, which makes it the ideal choice for inserts with conformal cooling in plastic injection molding and in any other application where a high hardness and corrosion resistance is of need.

    Read More
    • Additive Manufacturing Application
    • Market grade BÖHLER patent

    BÖHLER M789 AMPO is a newly developed maraging steel, which combines the mechanical properties of 1.2709 with the corrosion resistance of 17-4PH. This patent bending grade can easily printed without any preheating and achieves a hardness of about 52 HRC with a very easy heat treatment. Furthermore, this material shows an excellent polishability, which makes it the ideal choice for inserts with conformal cooling in plastic injection molding and in any other application where a high hardness and corrosion resistance is of need.

    Read More
  • BÖHLER W300 ISOBLOC

    BÖHLER W300 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as good hot hardness and very good resistance against heat-checkings. The combination of these properties makes it a top performer in high- and low-pressure die casting as well as in closed-die and open-die forging. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.

    BÖHLER W300 ISOBLOC

    High temperature toughness
    High temperature wear resistance
    Machinability in as supplied condition
    Polishability
    Read More
    • Hot Work
    • AISI H11
    • EN X37CrMoV5-1
    • JIS SKD6
    • NADCA D1830
    • SEL 1.2343
    • UNS T20811
    • EN ISO 4957
    • JIS G4404
    • NADCA #207

    BÖHLER W300 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as good hot hardness and very good resistance against heat-checkings. The combination of these properties makes it a top performer in high- and low-pressure die casting as well as in closed-die and open-die forging. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.

    Read More
  • BÖHLER W300 ISODISC

    BÖHLER W300 ISODISC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). This common tool steel has good hot toughness as well as a high hot hardness and a high resistance against heat-checkings. The combination of these properties makes it a standard choice in extrusion, forging and low-pressure die casting. This material is also available as W300 ISOBLOC which is a remelted grade with improved cleanliness, homogeneity and toughness.

    BÖHLER W300 ISODISC

    High temperature toughness
    High temperature wear resistance
    Machinability in as supplied condition
    Polishability
    Read More
    • Hot Work
    • AISI H11
    • EN X37CrMoV5-1
    • JIS SKD6
    • SEL 1.2343
    • UNS T20811
    • EN ISO 4957
    • JIS G4404

    BÖHLER W300 ISODISC is a 5% chromium steel and corresponds to material number 1.2343 (X37CrMoV5-1). This common tool steel has good hot toughness as well as a high hot hardness and a high resistance against heat-checkings. The combination of these properties makes it a standard choice in extrusion, forging and low-pressure die casting. This material is also available as W300 ISOBLOC which is a remelted grade with improved cleanliness, homogeneity and toughness.

    Read More
  • BÖHLER W302 ISOBLOC

    BÖHLER W302 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2344 (X40CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as very high hot hardness and a very good resistance against heat-checkings. The combination of these properties makes it a top performer in closed- and open-die forging as well as in high- and low-pressure die casting. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.

    BÖHLER W302 ISOBLOC

    High temperature toughness
    High temperature wear resistance
    Machinability in as supplied condition
    Polishability
    Read More
    • Hot Work
    • AISI H13
    • EN X40CrMoV5-1
    • JIS SKD61
    • NADCA B1885
    • SEL 1.2344
    • UNS T20813
    • EN ISO 4957
    • JIS G4404
    • NADCA #207

    BÖHLER W302 ISOBLOC is a 5% chromium steel and corresponds to material number 1.2344 (X40CrMoV5-1). Produced via the electroslag remelting process (ESR), this tool steel has very high hot toughness as well as very high hot hardness and a very good resistance against heat-checkings. The combination of these properties makes it a top performer in closed- and open-die forging as well as in high- and low-pressure die casting. In addition, this material has very good polishability and is therefore also often used as a molding material for plastic injection molds.

    Read More
  • BÖHLER W302 ISODISC

    BÖHLER W302 ISODISC is a 5% chromium steel and corresponds to material number 1.2344 (X40CrMoV5-1). This common tool steel has good hot toughness as well as a high hot hardness and a high resistance against heat-checkings. The combination of these properties makes it a standard choice in extrusion, forging and low-pressure die casting. This material is also available as W302 ISOBLOC which is a remelted grade with improved cleanliness, homogeneity and toughness.

    BÖHLER W302 ISODISC

    High temperature toughness
    High temperature wear resistance
    Machinability in as supplied condition
    Polishability
    Read More
    • Hot Work
    • AISI H13
    • EN X40CrMoV5-1
    • JIS SKD61
    • SEL 1.2344
    • UNS T20813
    • EN ISO 4957
    • JIS G4404

    BÖHLER W302 ISODISC is a 5% chromium steel and corresponds to material number 1.2344 (X40CrMoV5-1). This common tool steel has good hot toughness as well as a high hot hardness and a high resistance against heat-checkings. The combination of these properties makes it a standard choice in extrusion, forging and low-pressure die casting. This material is also available as W302 ISOBLOC which is a remelted grade with improved cleanliness, homogeneity and toughness.

    Read More
  • Uddeholm Bure

    Uddeholm Bure er et højstyrke specialstål, der er beregnet til anvendelser med store krav til materialets mekaniske egenskaber, samtidig med at det kræver god bearbejdelighed. Sammenlignet med lignende stålkvaliteter er bearbejdeligheden forbedret, hvilket letter operationer som boring og gevindskæring af små huller. Det er særligt velegnet til induktionshærdning og kan også forsynes med en PVD-belægning uden at reducere værktøjets hårdhed. Benefits Less wear from the chips High safety against tool breakage Less distortion by hardening Excellent machinability Uddeholm Bure is supplied either soft annealed or prehardened on demand.

    Uddeholm Bure

    • Corrosion resistance 10%
    • Wear resistance 50%
    • Polishability 50%
    • Toughness 60%
    Read More
    • Hot Work

    Uddeholm Bure er et højstyrke specialstål, der er beregnet til anvendelser med store krav til materialets mekaniske egenskaber, samtidig med at det kræver god bearbejdelighed. Sammenlignet med lignende stålkvaliteter er bearbejdeligheden forbedret, hvilket letter operationer som boring og gevindskæring af små huller. Det er særligt velegnet til induktionshærdning og kan også forsynes med en PVD-belægning uden at reducere værktøjets hårdhed. Benefits Less wear from the chips High safety against tool breakage Less distortion by hardening Excellent machinability Uddeholm Bure is supplied either soft annealed or prehardened on demand.

    Read More
  • Uddeholm Bure HT

    Uddeholm Bure HT is a pre-hardened, hot rolled high-strength special steel, intended for applications with severe demands on the mechanical properties of the material, while also requiring good machinability. Compared with similar steel grades the machinability is improved, which facilitates such operations as drilling and tapping of small holes. It is pre-hardened to a suitable hardness of 39-43 HRC, and can also be given a PVD coating without reducing the hardness of the tool. Benefits Delivered in pre-hardened state Less wear from the chips High safety against tool breakage Excellent machinability

    Uddeholm Bure HT

    • Corrosion resistance 10%
    • Wear resistance 50%
    • Toughness 60%
    • Machinability 80%
    Read More
    • Hot Work

    Uddeholm Bure HT is a pre-hardened, hot rolled high-strength special steel, intended for applications with severe demands on the mechanical properties of the material, while also requiring good machinability. Compared with similar steel grades the machinability is improved, which facilitates such operations as drilling and tapping of small holes. It is pre-hardened to a suitable hardness of 39-43 HRC, and can also be given a PVD coating without reducing the hardness of the tool. Benefits Delivered in pre-hardened state Less wear from the chips High safety against tool breakage Excellent machinability

    Read More
  • Uddeholm Holdax

    Uddeholm Holdax is prehardened steel with very good machinability and good resistance to indentation, mainly as holder steel for the plastic industry: Holders/bolsters for plastic moulds and die casting dies Plastics and rubber moulds with low requirements on polishability Support plates Constructional parts Uddeholm Holdax can also be used for engineering applications. Benefits Fast machining Less wear of cutting tools Good resistance to indentation Standard specification W.nr 1.2312 / AFNOR 40 CMD 8 + S

    Uddeholm Holdax

    • Corrosion resistance 20%
    • Wear resistance 30%
    • Polishability 40%
    • Toughness 40%
    Read More
    • Plastic Mould

    Uddeholm Holdax is prehardened steel with very good machinability and good resistance to indentation, mainly as holder steel for the plastic industry: Holders/bolsters for plastic moulds and die casting dies Plastics and rubber moulds with low requirements on polishability Support plates Constructional parts Uddeholm Holdax can also be used for engineering applications. Benefits Fast machining Less wear of cutting tools Good resistance to indentation Standard specification W.nr 1.2312 / AFNOR 40 CMD 8 + S

    Read More
  • Uddeholm Idun

    Uddeholm Idun is the world’s first patented corrosion resistant tool holder steel. It is delivered in pre-hardened condition and provides the possibility to start machining the finished part directly. Uddeholm Idun shares the superior qualities that always accompany the members of the Uddeholm Tool Holder Concept – meeting your requirements on durability while still being good to machine. With Uddeholm Idun we offer you even more: a possibility to change the game. A corrosion resistant steel grade that is delivered in pre-hardened condition. Uddeholm Idun allows you to skip the long and costly process of hardening, surface treatment and the transportation in between that is normally required with standard materials. A safe and reliable fast forward button to your finished product. It shortens tool making lead time and improves tool holder durability. It is e.g. perfect for custom made tool holders. Benefits Corrosion resistant Big savings in time and money Environmentally friendly

    Uddeholm Idun

    • Corrosion resistance 70%
    • Wear resistance 55%
    • Polishability 80%
    • Toughness 55%
    Read More
    • Plastic Mould

    Uddeholm Idun is the world’s first patented corrosion resistant tool holder steel. It is delivered in pre-hardened condition and provides the possibility to start machining the finished part directly. Uddeholm Idun shares the superior qualities that always accompany the members of the Uddeholm Tool Holder Concept – meeting your requirements on durability while still being good to machine. With Uddeholm Idun we offer you even more: a possibility to change the game. A corrosion resistant steel grade that is delivered in pre-hardened condition. Uddeholm Idun allows you to skip the long and costly process of hardening, surface treatment and the transportation in between that is normally required with standard materials. A safe and reliable fast forward button to your finished product. It shortens tool making lead time and improves tool holder durability. It is e.g. perfect for custom made tool holders. Benefits Corrosion resistant Big savings in time and money Environmentally friendly

    Read More
  • Uddeholm Ramax HH

    Uddeholm Ramax HH is a corrosion resistant holder steel with good machinability, supplied in a high prehardened condition. Good machinability and corrosion resistance reduces tool manufacturing and maintenance costs. Benefits Low mould production cost thanks to low wear of the cutting edges in the milling and drilling operations and shorter machining time thanks to increased cutting speed possible. Lower mould maintenance costs due to corrosion resistance Lower production costs since water cooling channels are less effected by corrosion, ensuring consistent cycle time Uddeholm Ramax HH is supplied at a hardness level that is higher than other corrosion resistant prehardened grades, resulting in a more durable mould and a longer life time. By combining Uddeholm Ramax HH with one of our other products within the Stainless Concept, you can create a completely stainless mould.

    Uddeholm Ramax HH

    • Corrosion resistance 60%
    • Wear resistance 40%
    • Polishability 40%
    • Toughness 30%
    Read More
    • Plastic Mould

    Uddeholm Ramax HH is a corrosion resistant holder steel with good machinability, supplied in a high prehardened condition. Good machinability and corrosion resistance reduces tool manufacturing and maintenance costs. Benefits Low mould production cost thanks to low wear of the cutting edges in the milling and drilling operations and shorter machining time thanks to increased cutting speed possible. Lower mould maintenance costs due to corrosion resistance Lower production costs since water cooling channels are less effected by corrosion, ensuring consistent cycle time Uddeholm Ramax HH is supplied at a hardness level that is higher than other corrosion resistant prehardened grades, resulting in a more durable mould and a longer life time. By combining Uddeholm Ramax HH with one of our other products within the Stainless Concept, you can create a completely stainless mould.

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  • Uddeholm RoyAlloy

    Uddeholm RoyAlloy is a high-performance stainless mould base tool steel designed to deliver exceptional durability and efficiency in demanding tooling environments. It is developed to meet the requirements of mould bases and moulds where demands on surface finish, service life, and corrosion resistance are more moderate. The material offers an attractive balance between performance, machinability, and cost, making it a competitive option for standard applications in the plastics industry. Benefits Unlike conventional stainless steels, RoyAlloy is supplied in a pre-hardened condition of approximately 30 HRC, eliminating the need for additional heat treatment. This significantly reduces lead times and production costs while ensuring dimensional stability throughout machining and finishing processes. RoyAlloy’s superior corrosion resistance sets it apart in applications where moisture or humid environments can compromise tool life. By minimizing rust and surface degradation, it ensures longer service intervals and reduced maintenance costs. The material’s homogeneous structure and stable mechanical properties provide good dimensional stability and sufficient strength for applications involving short to medium production runs or less demanding plastics. The steel’s weldability and repairability further enhance its value, allowing easy maintenance and extending tool lifespan.

    Uddeholm RoyAlloy

    • Corrosion resistance 60%
    • Wear resistance 30%
    • Polishability 40%
    • Toughness 40%
    Read More
    • Plastic Mould

    Uddeholm RoyAlloy is a high-performance stainless mould base tool steel designed to deliver exceptional durability and efficiency in demanding tooling environments. It is developed to meet the requirements of mould bases and moulds where demands on surface finish, service life, and corrosion resistance are more moderate. The material offers an attractive balance between performance, machinability, and cost, making it a competitive option for standard applications in the plastics industry. Benefits Unlike conventional stainless steels, RoyAlloy is supplied in a pre-hardened condition of approximately 30 HRC, eliminating the need for additional heat treatment. This significantly reduces lead times and production costs while ensuring dimensional stability throughout machining and finishing processes. RoyAlloy’s superior corrosion resistance sets it apart in applications where moisture or humid environments can compromise tool life. By minimizing rust and surface degradation, it ensures longer service intervals and reduced maintenance costs. The material’s homogeneous structure and stable mechanical properties provide good dimensional stability and sufficient strength for applications involving short to medium production runs or less demanding plastics. The steel’s weldability and repairability further enhance its value, allowing easy maintenance and extending tool lifespan.

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