KORRETTO · CNC tool holder accessories
Reduction Sleeves for Hydraulic Tool Holders
Reduction sleeves for hydraulic tool holders are used to adapt different cutting tool shank diameters within a hydraulic holder setup. They help one hydraulic tool holder work with different tool shank sizes when the sleeve size and holder bore are matched correctly.
Send the hydraulic holder bore, tool shank diameter, sleeve size requirement and machining process, and we will help check the suitable reduction sleeve model.
Product Overview
A reduction sleeve fits between a hydraulic tool holder bore and a smaller cutting-tool shank. Its outer diameter matches the holder bore. Its inner diameter matches the tool shank. The table groups sleeves from HC12 to HC32.
Typical Applications
- Hydraulic tool holder diameter adaptation
- HSK, BT / BBT and SK hydraulic holder setups
- Cutting tools with smaller shank diameters
- Tooling systems requiring flexible tool shank matching
- Applications where sleeve fit and runout control are important
Key Features
Reduction sleeve accessory for hydraulic tool holders
Helps adapt tool shank diameter to holder bore
Multiple HC12 to HC32 model groups according to the source table
Supports flexible tool shank matching
Must be selected together with holder bore and cutting tool shank size
Parameters and Dimensions
Use the dimension drawing and parameter tables below to verify dimensions and key parameters before model selection.
| Order No. | Model | Inner Diameter Φd (mm) | Outer Diameter ΦD (mm) | L (mm) | L1 (mm) |
|---|---|---|---|---|---|
| A012010 | HC12-3 | 3 | 12 | 47 | 45 |
| A012011 | HC12-4 | 4 | 12 | 47 | 45 |
| A012012 | HC12-5 | 5 | 12 | 47 | 45 |
| A012013 | HC12-6 | 6 | 12 | 47 | 45 |
| A012015 | HC12-7 | 7 | 12 | 47 | 45 |
| A012014 | HC12-8 | 8 | 12 | 47 | 45 |
| A012016 | HC16-3 | 3 | 16 | 50 | 47 |
| A012017 | HC16-4 | 4 | 16 | 50 | 47 |
| A012018 | HC16-5 | 5 | 16 | 50 | 47 |
| A012019 | HC16-6 | 6 | 16 | 50 | 47 |
| A012020 | HC16-7 | 7 | 16 | 50 | 47 |
| A012021 | HC16-8 | 8 | 16 | 50 | 47 |
| A012022 | HC16-9 | 9 | 16 | 50 | 47 |
| A012023 | HC16-10 | 10 | 16 | 50 | 47 |
| A012024 | HC16-11 | 11 | 16 | 50 | 47 |
| A012025 | HC16-12 | 12 | 16 | 50 | 47 |
| A012110 | HC20-3 | 3 | 20 | 53.5 | 50.5 |
| A012111 | HC20-3.175 | 3.175 | 20 | 53.5 | 50.5 |
| A012112 | HC20-4 | 4 | 20 | 53.5 | 50.5 |
| A012113 | HC20-5 | 5 | 20 | 53.5 | 50.5 |
| A012114 | HC20-6 | 6 | 20 | 53.5 | 50.5 |
| A012115 | HC20-7 | 7 | 20 | 53.5 | 50.5 |
| A012116 | HC20-8 | 8 | 20 | 53.5 | 50.5 |
| A012117 | HC20-9 | 9 | 20 | 53.5 | 50.5 |
| A012118 | HC20-10 | 10 | 20 | 53.5 | 50.5 |
| A012119 | HC20-11 | 11 | 20 | 53.5 | 50.5 |
| A012120 | HC20-12 | 12 | 20 | 53.5 | 50.5 |
| A012121 | HC20-13 | 13 | 20 | 53.5 | 50.5 |
| A012122 | HC20-14 | 14 | 20 | 53.5 | 50.5 |
| A012123 | HC20-15 | 15 | 20 | 53.5 | 50.5 |
| A012124 | HC20-16 | 16 | 20 | 53.5 | 50.5 |
| A012125 | HC25-3 | 3 | 25 | 58 | 55 |
| A012126 | HC25-4 | 4 | 25 | 58 | 55 |
| A012127 | HC25-5 | 5 | 25 | 58 | 55 |
| A012128 | HC25-6 | 6 | 25 | 58 | 55 |
| A012129 | HC25-7 | 7 | 25 | 58 | 55 |
| A012130 | HC25-8 | 8 | 25 | 58 | 55 |
| A012131 | HC25-9 | 9 | 25 | 58 | 55 |
| A012132 | HC25-10 | 10 | 25 | 58 | 55 |
| A012133 | HC25-11 | 11 | 25 | 58 | 55 |
| A012134 | HC25-12 | 12 | 25 | 58 | 55 |
| A012135 | HC25-13 | 13 | 25 | 58 | 55 |
| A012136 | HC25-14 | 14 | 25 | 58 | 55 |
| A012137 | HC25-15 | 15 | 25 | 58 | 55 |
| A012138 | HC25-16 | 16 | 25 | 58 | 55 |
| A012139 | HC25-17 | 17 | 25 | 58 | 55 |
| A012140 | HC25-18 | 18 | 25 | 58 | 55 |
| A012141 | HC25-19 | 19 | 25 | 58 | 55 |
| A012142 | HC25-20 | 20 | 25 | 58 | 55 |
| A012210 | HC32-6 | 6 | 32 | 64.5 | 61 |
| A012211 | HC32-7 | 7 | 32 | 64.5 | 61 |
| A012212 | HC32-8 | 8 | 32 | 64.5 | 61 |
| A012213 | HC32-9 | 9 | 32 | 64.5 | 61 |
| A012214 | HC32-10 | 10 | 32 | 64.5 | 61 |
| A012215 | HC32-11 | 11 | 32 | 64.5 | 61 |
| A012216 | HC32-12 | 12 | 32 | 64.5 | 61 |
| A012217 | HC32-13 | 13 | 32 | 64.5 | 61 |
| A012218 | HC32-14 | 14 | 32 | 64.5 | 61 |
| A012219 | HC32-15 | 15 | 32 | 64.5 | 61 |
| A012220 | HC32-16 | 16 | 32 | 64.5 | 61 |
| A012221 | HC32-17 | 17 | 32 | 64.5 | 61 |
| A012222 | HC32-18 | 18 | 32 | 64.5 | 61 |
| A012223 | HC32-19 | 19 | 32 | 64.5 | 61 |
| A012224 | HC32-20 | 20 | 32 | 64.5 | 61 |
| A012225 | HC32-25 | 25 | 32 | 64.5 | 61 |
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Selection Notes
Start with the two diameters. For example, HC12-3 has a 12 mm outer diameter and a 3 mm inner diameter. It matches a 12 mm holder bore to a 3 mm tool shank. HC16-3 keeps the 3 mm inner diameter but uses a 16 mm outer diameter.
Check sleeve length and tool insertion depth next. Keep the tool shank inside the clamping length required by the holder. Clean the holder bore, both sleeve surfaces and the tool shank before fitting them together.
If the process uses through-tool coolant, confirm the sleeve and holder sealing arrangement. Compare the matching HSK hydraulic holder, BT / BBT hydraulic holder or SK hydraulic holder before ordering.
FAQ
What are reduction sleeves for hydraulic tool holders used for?
Reduction sleeves are used to adapt cutting tool shank diameters inside hydraulic tool holders. They allow one hydraulic holder bore to clamp smaller tool shanks when the sleeve and holder are matched correctly.
Are reduction sleeves complete tool holders?
No. Reduction sleeves are accessories used inside hydraulic tool holders. They are not complete holder bodies and should be selected together with the matching holder and tool shank size.
What holder bore and tool shank information should be confirmed?
Please confirm the hydraulic holder bore, the required tool shank diameter and the sleeve size relationship. This is the basic information needed to select the correct reduction sleeve.
Can one reduction sleeve fit all hydraulic tool holders?
No. Reduction sleeves must match the holder bore, sleeve size and clamping application. Final selection depends on the holder series, bore size and the tool shank to be clamped.
What runout, sealing or speed requirement should be checked?
Please confirm any runout target, coolant sealing requirement, spindle speed and machining process. These conditions help determine the suitable sleeve specification.
How is a reduction sleeve different from a complete CNC tool holder?
A reduction sleeve is an accessory used inside a holder to adapt tool shank size. A complete CNC tool holder includes the holder body and spindle-side interface for machine installation.
What should be checked before installation?
Check the holder bore, sleeve size, tool shank diameter, clamping length and cleanliness of the contact surfaces before installation. The sleeve must be fitted correctly inside the matching holder.
What information is needed for quotation?
Please provide the hydraulic holder model or bore size, tool shank diameter, sleeve size requirement, machining process and any sealing or speed requirement.
