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China Side Cutter Holder and Oil-feed Holders from Leading Suppliers and Factory
HSK-A-DSC Side Cutter Holder

| Specification | L1 | L2 | L3 | D1 | D2 | K | H | T | Weight |
| HSK63A-DSC22-90 | 90 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 1.45 |
| HSK63A-DSC22-135 | 135 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 1.77 |
| HSK63A-DSC27-90 | 90 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 1.87 |
| HSK63A-DSC27-135 | 135 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 2.33 |
| HSK63A-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 2.32 |
| HSK63A-DSC32-135 | 135 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 2.93 |
| HSK100A-DSC22-90 | 90 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 2.78 |
| HSK100A-DSC22-135 | 135 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 3.10 |
| HSK100A-DSC27-90 | 90 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 3.19 |
| HSK100A-DSC27-135 | 135 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 3.66 |
| HSK100A-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 3.65 |
| HSK100A-DSC32-135 | 135 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 4.26 |
| HSK100A-DSC40-90 | 90 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 4.40 |
| HSK100A-DSC32-135 | 135 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 5.24 |
BT-DSC Side Cutter Holder

| Specification | L1 | L2 | L3 | D1 | D2 | K | H | T | Weight |
| BT40-DSC22-75 | 75 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 1.69 |
| BT40-DSC22-120 | 120 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 2.01 |
| BT40-DSC27-75 | 75 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 2.06 |
| BT40-DSC27-120 | 120 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 2.52 |
| BT40-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 2.68 |
| BT50-DSC22-90 | 90 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 4.40 |
| BT50-DSC22-135 | 135 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 4.72 |
| BT50-DSC27-90 | 90 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 4.78 |
| BT50-DSC27-135 | 135 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 5.25 |
| BT50-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 5.21 |
| BT50-DSC32-135 | 135 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 5.82 |
| BT50-DSC40-90 | 90 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 5.93 |
| BT50-DSC40-135 | 135 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 6.76 |
BT-SLO Oil-feed Holder

| Specification | D | d | L1 | L2 | L3 | L | B | Side-lock screw | Wrench | Weight |
| BT40-SLO32-150 | 72 | 32 | 50 | 15 | 15 | 150 | 60/65 | M120U200 | L06D | 5.33/5.35 |
| BT40-SLO40-150 | 72 | 40 | 50 | 18 | 19 | 150 | 60/65 | M140U160 | L06D | 5.04/5.07 |
| BT50-SLO32-160 | 72 | 32 | 50 | 15 | 15 | 160 | 80/82 | M120U200 | L06D | 8.63/8.65 |
| BT50-SLO40-160 | 72 | 40 | 50 | 18 | 19 | 160 | 80/82 | M140U160 | L06D | 8.33/8.35 |
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Notice: 1. Wrench is included; 2. Before order please check the distance B.
CSO Reducing Sleeve

| Specification | D | d | d1 | L1 | L2 | L3 | L | Weight |
| CSO32-16 | 53 | 32 | 16 | 10 | 15 | 15 | 65 | 0.40 |
| CSO32-20 | 53 | 32 | 20 | 10 | 15 | 15 | 65 | 0.35 |
| CSO32-25 | 53 | 32 | 25 | 10 | 15 | 15 | 65 | 0.26 |
| CSO40-16 | 63 | 40 | 16 | 10 | 18 | 19 | 75 | 0.74 |
| CSO40-20 | 63 | 40 | 20 | 10 | 18 | 19 | 75 | 0.68 |
| CSO40-25 | 63 | 40 | 25 | 10 | 18 | 19 | 75 | 0.59 |
| CSO40-32 | 63 | 40 | 32 | 10 | 18 | 19 | 75 | 0.41 |
PB Oil-feed Holder Positioning Block
| Specification | Weight |
| BT40-PB30-35 | 0.53 |
| BT50-PB30-35 | 0.46 |
⚠️
Notice: Using oil-feed holder, positioning block is required.
Make sure to apply of the right method when assembling this block to different machines.
Make sure to apply of the right method when assembling this block to different machines.
SK-DSC Side Cutter Holder

| Specification | L1 | L2 | L3 | D1 | D2 | K | H | T | Weight |
| SK40-DSC22-75 | 75 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 1.58 |
| SK40-DSC22-120 | 120 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 1.90 |
| SK40-DSC27-75 | 75 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 1.97 |
| SK40-DSC27-120 | 120 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 2.44 |
| SK40-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 2.61 |
| SK50-DSC22-90 | 90 | 22 | 30.00 | 22 | 34 | 6 | 24.3 | M20*1.5P | 3.52 |
| SK50-DSC27-90 | 90 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 3.96 |
| SK50-DSC27-135 | 135 | 28 | 30.00 | 27 | 41 | 7 | 30 | M24*1.5P | 4.43 |
| SK50-DSC32-90 | 90 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 4.45 |
| SK50-DSC32-135 | 135 | 32 | 30.00 | 32 | 47 | 8 | 35.5 | M30*1.5P | 5.06 |
| SK50-DSC40-90 | 90 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 5.26 |
| SK50-DSC40-135 | 135 | 40 | 30.00 | 40 | 55 | 10 | 43.7 | M36*2.0P | 6.10 |
SK-SLO Oil-feed Holder

| Specification | D | d | L1 | L2 | L3 | L | B | Side-lock screw | Wrench | Weight |
| SK40-SLO32-160 | 72 | 32 | 50 | 15 | 15 | 160 | 60/65 | M120U200 | L06D | 5.35 |
| SK40-SLO40-160 | 72 | 40 | 50 | 18 | 19 | 160 | 60/65 | M140U160 | L06D | 5.04 |
| SK50-SLO32-160 | 72 | 32 | 50 | 15 | 15 | 160 | 80/82 | M120U200 | L06D | 8.64 |
| SK50-SLO40-160 | 72 | 40 | 50 | 18 | 19 | 160 | 80/82 | M140U160 | L06D | 8.35 |
⚠️
Notice: 1. Wrench is included; 2. Before order please check the distance B.
CSO Oil-feed Holder Reducing Sleeve

| Specification | D | d | d1 | L1 | L2 | L3 | L | Weight |
| CSO32-16 | 53 | 32 | 16 | 10 | 15 | 15 | 65 | 0.40 |
| CSO32-20 | 53 | 32 | 20 | 10 | 15 | 15 | 65 | 0.35 |
| CSO32-25 | 53 | 32 | 25 | 10 | 15 | 15 | 65 | 0.26 |
| CSO40-16 | 63 | 40 | 16 | 10 | 18 | 19 | 75 | 0.74 |
| CSO40-20 | 63 | 40 | 20 | 10 | 18 | 19 | 75 | 0.68 |
| CSO40-25 | 63 | 40 | 25 | 10 | 18 | 19 | 75 | 0.59 |
| CSO40-32 | 63 | 40 | 32 | 10 | 18 | 19 | 75 | 0.41 |
❓ Frequently Asked Questions
Q
What is the difference between HSK-A-DSC and BT-DSC side cutter holders?
The HSK-A-DSC side cutter holder uses an HSK-A taper interface (available in HSK63A and HSK100A), which provides higher rigidity and better suitability for high-speed machining. The BT-DSC uses a BT taper interface (BT40 and BT50), which is more common in standard CNC machining centers. Both series share the same DSC cutting head dimensions, making them interchangeable in terms of tooling accessories.
Q
What does the number in the specification code represent? (e.g., BT40-DSC22-75)
In the specification code, the first part indicates the taper type and size (e.g., BT40 or HSK63A), the middle part indicates the cutter head type and bore diameter in mm (e.g., DSC22 means DSC type with 22mm bore), and the last number indicates the total length L1 in mm (e.g., 75mm). This naming convention applies consistently across all DSC and SLO series holders.
Q
Is a wrench included with the BT-SLO and SK-SLO oil-feed holders?
Yes, a wrench (model L06D) is included with every BT-SLO and SK-SLO oil-feed holder. Please note that before placing an order, you should verify the distance B to ensure compatibility with your machine spindle configuration.
Q
When is the PB Oil-feed Holder Positioning Block required?
The PB Oil-feed Holder Positioning Block (BT40-PB30-35 or BT50-PB30-35) is required whenever an oil-feed holder is used. It ensures correct positioning of the holder on the machine. Please make sure to apply the correct assembly method when fitting this block to different machine types.
Q
What is the purpose of the CSO Reducing Sleeve?
The CSO Reducing Sleeve is used to adapt smaller-diameter cutting tools to a larger-bore oil-feed holder (SLO series). For example, a CSO32-16 sleeve allows a 16mm shank tool to be mounted in a 32mm bore holder. This provides flexibility in tooling selection without needing to replace the entire holder assembly.
Q
What materials and standards are these tool holders manufactured to?
These tool holders are precision-machined to meet international standards for CNC tooling interfaces, including ISO/DIN standards for BT and HSK tapers, and JIS standards for SK tapers. They are manufactured from high-grade alloy steel with precise heat treatment to ensure dimensional accuracy, rigidity, and long service life in demanding machining applications.











