The REDEX SRP planetary servo-reducer is a high-performance gearbox designed for precision applications, offering robust mounting, setup, and maintenance features. It is engineered to provide reliable operation, with specific instructions for lubrication, motor installation, output pinion mounting, and integration into machine frames, including gantry and rotary drive configurations.
Function Description:
The SRP planetary servo-reducer is designed to transmit power and torque with high precision and efficiency. It serves as a critical component in various motion control systems, particularly those requiring accurate positioning and dynamic performance. The SRP.R variant, featuring a right-angle configuration, also supports a patented DualDRIVE mechanical preload solution to eliminate backlash in the system, enhancing accuracy and stiffness in linear and rotary drives. The gearbox can be supplied with an integrated output pinion (OP) for direct rack and pinion applications.
Important Technical Specifications:
The SRP series offers a range of models (SRP0 to SRP6) with varying torque capacities, input speeds, and weights.
- Maximum Acceleration Output Torque (Nm):
- 1-stage: Ranges from 350 Nm (SRP0, i=5, 7, 10) to 1750 Nm (SRP2, i=5, 7, 10).
- 2-stages: Ranges from 473 Nm (SRP0, i=46, 91) to 18590 Nm (SRP3, i=31) and up to 17128 Nm (SRP6, i=21, 46, 61, 91).
- Max. Input Speed (rpm):
- 1-stage (i=5, 7, 10): 6000 rpm (SRP0), 5000 rpm (SRP1), 4000 rpm (SRP2).
- 2-stages (i=21 to 91): 6000 rpm (SRP1, SRP2), 5000 rpm (SRP3), 4000 rpm (SRP4, SRP5), 3500 rpm (SRP6).
- Approximate Weight (kg):
- SRP.R (right angle): 1-stage from 11.3 kg (SRP0) to 41.2 kg (SRP2); 2-stages from 17 kg (SRP1) to 635 kg (SRP6).
- SRP.M (in-line): 1-stage from 6.8 kg (SRP0) to 33.7 kg (SRP2); 2-stages from 14.9 kg (SRP1) to 510 kg (SRP6).
- Output Pinion (OP) Characteristics: The manual provides detailed tables for various output pinions (OP0 to OP6) including number of teeth (Z), module (Mo), pitch diameter (D02), and maximum run-out (Quality 6) in µm. For example, OP0 has Z=45, Mo=2, D02=95.49, and max run-out of 21 µm.
- Mounting Position Nomenclature: The units can be configured for B5 horizontal, V1 vertical down, or V3 vertical up output flange positions, with examples like V1/B5 (output flange vertical down / motor flange horizontal).
Usage Features:
- Motor Installation (MF-type for SRP.R and IF-type for SRP.M): Detailed procedures are provided for mounting motors with cylindrical or taper shafts. This includes cleaning surfaces, mounting couplings (with or without shaft adapters), tightening screws to specified torques (e.g., M6 screws for motor flange at 10 Nm, M10 for coupling at 50 Nm), and ensuring proper alignment. Special attention is given to vertical mounting for IF-type flanges to prevent stress on the input shaft.
- Output Pinion Mounting: The SRP unit can be delivered with a pre-fixed output pinion. For customer mounting, the procedure involves placing the pinion on the output flange pilot diameter, inserting screws without tightening, controlling pinion run-out with pins (admissible values provided, e.g., 21 µm for OP0), adjusting centering, and then tightening screws to specified torques (e.g., M6 at 17 Nm, M20 at 690 Nm).
- Mounting on Machine Frame: Instructions cover gearbox fixing flange details (e.g., SRP0 uses 8 x 5.5 screws with 10 Nm torque) and output/input side connections. For sizes 0, 1, and 2, pinning the accessory on the gearbox output according to ISO9409 is recommended.
- Rack Mounting Tolerance: Specifies parallelism tolerances between the rack reference surface and the linear guide (e.g., 0.015 mm for module 3, 0.020 mm for module > 3).
- SRP Parallelism and Perpendicularity Tolerances: Provides maximum allowed mounting tolerances for parallelism of the flange fixing face with the rack main axis (e.g., 0.02 mm for SRP0-SRP3, 0.030 mm for SRP5-SRP6).
- SRP Mounting Height Setting: Details how to determine and respect the mounting height (hm) of the SRP axis, including tooth radial clearance (tb1).
- Proper Tooth Meshing Validation: Describes a method to check the clearance between rack and pinion teeth (tb2) using two indicators, with acceptable backlash values provided (e.g., 0.050 mm for SRP0, module 2).
- Tooth Contact Pattern Check: Recommends bluing the pinion teeth to visually verify that 70-80% of the contact surface is covered, illustrating typical mesh errors.
- Mechanical Preload (DualDRIVE for SRP.R): This patented solution eliminates backlash. The kit includes a locking tool, spacer, preloading coupling, shaft adapters, and shims. Procedures for shaft alignment and preload setting for both linear and rotary drives are detailed, emphasizing the use of a torque wrench with an indicator for precise preload application. The optimal preload torque (Tp) is application-specific, and maximum admissible values are provided to prevent damage.
Maintenance Features:
- Lubrication: SRP units are delivered pre-lubricated with oil for a lifetime of 10,000 hours.
- Recommended Lubricants: Synthetic PAO-based oil with 150 Cst viscosity at 40°C is recommended, with specific brands like KLUBER, MOBIL, TOTAL, SHELL, and LUBCON listed.
- Oil Filling: Instructions include unscrewing the fill-in plug, filling until oil comes out of the level hole (approximate volumes provided for different mounting positions, e.g., SRP0.M 1-stage B5 needs 100 cm3, SRP0.R 1-stage B5/B5 needs 330 cm3), and replacing the plug. For SRP.R, checking the sight-glass is crucial.
- Oil Draining: To remove residual particles, it's recommended to run the unit before draining to reduce oil viscosity and "wash" with fresh oil before refilling. The procedure involves unscrewing fill-in and lowest plugs. Drained oil is industrial waste and must be handled according to laws.
- Long-Term Storage: Gearboxes not immediately installed should be stored in a dry atmosphere (0°C to 40°C) and completely filled with oil for anti-corrosion protection.
- Rack & Pinion Lubrication (Optional Lube Pinion PGRP and Support SURP): For external rack and pinion lubrication, the PGRP and SURP option is available. The PGRP meshes with the rack, and the SURP supports it, delivering lubricant to its center via a Ø6 x Ø4 tube fitting. Recommended lubricants for this external system include DLS Schmiersysteme F01/F02, Mobil Glycol 460 HE, and others, with a minimum recommended viscosity of 220 Cst. Oil flow rates are determined using a provided graph based on module and speed.
The SRP planetary servo-reducer is a comprehensive solution, offering detailed guidance for installation, operation, and maintenance to ensure optimal performance and longevity.
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