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Borelli Splined Coupling Halves with 1:8 Tapered Bore – 10000 Series
The Borelli Splined Coupling Halves with 1:8 Tapered Bore – 10000 Series connect 1:8 tapered shafts to splined transmission components in accordance with DIN 5482 B standards. Manufactured from heat-treated UNI 16CrNi4/Pb steel or quenched and tempered UNI 38NiCrMo4/Pb steel with Tenifer nitriding treatment (mechanical strength R = 95–105 kg/mm²), they ensure precise connections for standard hydraulic pumps and Marzocchi and Turolla pumps, covering pump groups from 0.5 to 8.
The available product codes are: 10001, 10002, 10003, 10004, 10033, 10005, 10026, 10007, 10035, 10036, 10039, 10008, 10040, 10009, 10010, 10043, 10012, 10044, 10014, 10046, 10049, 10050, 10015, 10051, 10016, 10017, 10052, 10023, 10055, 10018, 10056, 10019, 10020, 10057, 10058, 10021, 10059, 10060, 10061, 10062, 10063, 10064, 10065, 10066, 10067, 10068, 10069, 10070, 10071, 10072, 10073, 10074, 10075, 10076, 10077, 10078.
Borelli Splined Coupling Halves with 1:8 Tapered Bore – 10000 Series
The Borelli Splined Coupling Halves with 1:8 Tapered Bore – 10000 Series are precision mechanical components designed for connecting hydraulic units. Standard production uses heat-treated UNI 16CrNi4/Pb steel, ensuring structural toughness and resistance to dynamic stresses.
Specific catalogue models (product codes 10005, 10026 and 10014) are manufactured from quenched and tempered UNI 38NiCrMo4/Pb steel. These models undergo a surface nitriding treatment (Tenifer), which provides mechanical strength of R = 95 – 105 kg/mm², helping prevent premature spline wear under high operating loads.
Each coupling half features an internal bore with a 1:8 taper ratio, compliant with the construction standards for hydraulic pump shafts. Rotational motion is transmitted to the female coupling component through an external spline profile compliant with DIN 5482 B standards.
The dimensional range includes spline profiles from 20×17 (12 teeth) to 100×94 (44 teeth), covering external diameters (dimension B) ranging from 19.5 mm to 99.3 mm and overall lengths (dimension L) between 7 mm and 42 mm. The keyway features widths (dimension D) ranging from 2 mm to 7 mm and radial depths (dimension C) ranging from 4 mm to 19.4 mm, depending on the taper size.
The series ensures interchangeability and compatibility with standard hydraulic gear pumps and special versions manufactured by companies such as Marzocchi and Turolla. The catalogue covers pump sizes from 0.5 to 4, together with their corresponding mounting configurations for intermediate and combined pump groups:
| Specification | Value |
|---|---|
| Product Type | Splined Coupling Halves – 10000 Series |
| Bore Taper Ratio | 1:8 |
| External Spline Profile | DIN 5482 B (from 20×17 to 100×94) |
| Number of Spline Teeth | 12 to 44 teeth |
| Standard Construction Material | Heat-treated UNI 16CrNi4/Pb steel |
| Quenched and Tempered Version Material (*) | Quenched and tempered UNI 38NiCrMo4/Pb steel with nitriding treatment (Tenifer) |
| Material Mechanical Strength (*) | R = 95 – 105 kg/mm² |
| Compatible Pump Types | 0.5 – 1 – 2 – 2.5 – 3 – 3.5 – 4 (Standard, Marzocchi, Turolla) |
| Supported Pump Groups | Groups 1, 2, 2.5, 3, 3.5, 4, 5, 6, 7, 8 (including intermediate configurations /1, /2, /3, /3.5, /4) |
| Initial Taper Dimension Range (A) | 6 mm to 27.7 mm |
| External Diameter Range (B) | 19.5 mm to 99.3 mm |
| Keyway Dimension Range (C x D) | C: 4 mm to 19.4 mm | D: 2 mm to 7 mm |
| Overall Length (L) | 7 mm to 42 mm |
| Product Code | Pump Type | Pump Group | DIN 5482 B Profile | Number of Teeth | A (mm) | B (mm) | C (mm) | D (mm) | L (mm) |
|---|---|---|---|---|---|---|---|---|---|
| 10001 | 1 | 1 | 20×17 | 12 | 8 | 19.5 | 5.7 | 2.4 | 14.5 |
| 10002 | 0.5 | 2/0.5 | 20×17 | 12 | 6 | 19.5 | 4 | 2 | 7 |
| 10003 | 1 | 2/1 | 25×22 | 14 | 8 | 24.5 | 5.7 | 2.4 | 14.5 |
| 10004 | 0.5 | 2/1 | 25×22 | 14 | 6 | 24.5 | 4 | 2 | 9 |
| 10033 | 1 MARZOCCHI | 2/1 | 25×22 | 14 | 12 | 24.5 | 8.5 | 3 | 16 |
| *10005 | 2 | 2 | 25×22 | 14 | 14.2 | 24.5 | 9.3 | 3.17 | 22 |
| *10026 | 2 TUROLLA | 2 | 25×22 | 14 | 14.5 | 24.5 | 9.1 | 4 | 22.5 |
| 10007 | 2 | 2 | 28×25 | 15 | 14.2 | 27.5 | 9.7 | 3.17 | 22 |
| 10035 | 2 | 2 | 28×25 | 15 | 14.5 | 27.5 | 9.7 | 4 | 22.5 |
| 10036 | 1 | 2.5/1 | 32×28 | 17 | 8 | 31.5 | 5.7 | 2.4 | 14.5 |
| 10039 | 1 MARZOCCHI | 2.5/1 | 32×28 | 17 | 12 | 31.5 | 8.5 | 3 | 16 |
| 10008 | 2 | 2.5/2 | 32×28 | 17 | 14.2 | 31.5 | 9.7 | 3.17 | 22 |
| 10040 | 2 TUROLLA | 2.5/2 | 32×28 | 17 | 14.5 | 31.5 | 9.7 | 4 | 22.5 |
| 10009 | 2.5 | 2.5 | 32×28 | 17 | 18.7 | 31.5 | 11.6 | 4 | 26 |
| 10010 | 1 | 3/1 | 35×31 | 18 | 8 | 34.5 | 5.7 | 2.4 | 14.5 |
| 10043 | 1 MARZOCCHI | 3/1 | 35×31 | 18 | 12 | 34.5 | 8.5 | 3 | 16 |
| 10012 | 2 | 3/2 | 35×31 | 18 | 14.2 | 34.5 | 9.7 | 3.17 | 22 |
| 10044 | 2 TUROLLA | 3/2 | 35×31 | 18 | 14.5 | 34.5 | 9.7 | 4 | 22.5 |
| *10014 | 3 | 3 | 35×31 | 18 | 18.7 | 34.5 | 12.5 | 4 | 26 |
| 10046 | 1 | 3.5/1 | 35×31 | 20 | 8 | 39.5 | 5.7 | 2.4 | 14.5 |
| 10049 | 1 ON REQUEST | 3.5/1 | 40×36 | 20 | 9.7 | 39.5 | 6.7 | 3 | 16 |
| 10050 | 1 MARZOCCHI | 3.5/1 | 40×36 | 20 | 12 | 39.5 | 8.5 | 3 | 16 |
| 10015 | 2 | 3.5/2 | 40×36 | 20 | 14.2 | 39.5 | 9.7 | 3.17 | 22 |
| 10051 | 2 TUROLLA | 3.5/2 | 40×36 | 20 | 14.5 | 39.5 | 9.7 | 4 | 22.5 |
| 10016 | 3 | 3.5/3 | 40×36 | 20 | 18.7 | 39.5 | 12.5 | 4 | 26 |
| 10017 | 3.5 | 3.5 | 40×36 | 20 | 21.2 | 39.5 | 15.1 | 4.76 | 32 |
| 10052 | 3.5 TUROLLA | 3.5 | 40×36 | 20 | 23.7 | 39.5 | 15 | 6 | 38 |
| 10023 | 1 | 4/1 | 48×44 | 23 | 8 | 47.5 | 5.7 | 2.4 | 14.5 |
| 10055 | 1 Marzocchi | 4/1 | 48×44 | 23 | 12 | 47.5 | 8.5 | 3 | 16 |
| 10018 | 2 | 4/2 | 48×44 | 23 | 14.2 | 47.5 | 9.7 | 3.17 | 22 |
| 10056 | 2 Turolla | 4/2 | 48×44 | 23 | 14.5 | 47.5 | 9.7 | 4 | 22.5 |
| 10019 | 3 | 4/3 | 48×44 | 23 | 18.7 | 47.5 | 12.5 | 4 | 26 |
| 10020 | 3.5 | 4/3.5 | 48×44 | 23 | 21.2 | 47.5 | 15.1 | 4.76 | 32 |
| 10057 | 3.5 Marzocchi | 4/3.5 | 48×44 | 23 | 21.2 | 47.5 | 15.1 | 5 | 32 |
| 10058 | 3.5 Turolla | 4/3.5 | 48×44 | 23 | 23.7 | 47.5 | 15 | 6 | 38 |
| 10021 | 4 | 4 | 48×44 | 23 | 27.7 | 47.5 | 18.7 | 6.35 | 42 |
| 10059 | 4 Marzocchi | 4 | 48×44 | 23 | 27.7 | 47.5 | 19.4 | 7 | 42 |
| 10060 | 2 | 5/2 | 58×53 | 27 | 14.2 | 57.5 | 9.7 | 3.17 | 22 |
| 10061 | 2 Turolla | 5/2 | 58×53 | 27 | 14.5 | 57.5 | 9.7 | 4 | 22.5 |
| 10062 | 3 | 5/3 | 58×53 | 27 | 18.7 | 57.5 | 12.5 | 4 | 26 |
| 10063 | 3.5 | 5/3.5 | 58×53 | 27 | 21.2 | 57.5 | 15.1 | 4.76 | 32 |
| 10064 | 3.5 Marzocchi | 5/3.5 | 58×53 | 27 | 21.2 | 57.5 | 15.1 | 5 | 32 |
| 10065 | 3.5 Turolla | 5/3.5 | 58×53 | 27 | 23.7 | 57.5 | 15 | 6 | 38 |
| 10066 | 4 | 5/4 | 58×53 | 27 | 27.7 | 57.5 | 18.7 | 6.35 | 42 |
| 10067 | 4 Marzocchi | 5/4 | 58×53 | 27 | 27.7 | 57.5 | 19.4 | 7 | 42 |
| 10068 | 2 | 6/2 | 72×66 | 33 | 14.2 | 71.3 | 9.7 | 3.17 | 22 |
| 10069 | 2 Turolla | 6/2 | 72×66 | 33 | 14.5 | 71.3 | 9.7 | 4 | 22.5 |
| 10070 | 3 | 6/3 | 72×66 | 33 | 18.7 | 71.3 | 12.5 | 4 | 26 |
| 10071 | 3.5 | 6/3.5 | 72×66 | 33 | 21.2 | 71.3 | 15.1 | 4.76 | 32 |
| 10072 | 4 | 6/4 | 72×66 | 33 | 27.7 | 71.3 | 18.7 | 6.35 | 42 |
| 10073 | 3 | 7/3 | 80×74 | 36 | 18.7 | 79.3 | 12.5 | 4 | 26 |
| 10074 | 3.5 | 7/3.5 | 80×74 | 36 | 21.2 | 79.3 | 15.1 | 4.76 | 32 |
| 10075 | 4 | 7/4 | 80×74 | 36 | 27.7 | 79.3 | 18.7 | 6.35 | 42 |
| 10076 | 3 | 8/3 | 100×94 | 44 | 18.7 | 99.3 | 12.5 | 4 | 26 |
| 10077 | 3.5 | 8/3.5 | 100×94 | 44 | 21.2 | 99.3 | 15.1 | 4.76 | 32 |
| 10078 | 4 | 8/4 | 100×94 | 44 | 27.7 | 99.3 | 18.7 | 6.35 | 42 |