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The new benchmark for electrical preload on demanding machine tool applications!
KRPX is the new version of REDEX ANDANTEX rack & pinion high-tech planetary reducers, offering cost effective, easy to implement and high performing solutions for moving column or gantry machine types as well as many other applications.
The KRPX housing is made of high quality spheroidal graphite cast iron. Its structure has been optimised with FEM analysis methods to avoid deflection during acceleration. Fixation is made by oversized screws to ensure a real still connection with the machine frame allowing the KRPX housings to be considered as an integrated part of the machine main frame.
The output pinions are machined to the same diameter as the shafts, allowing the best possible balance between transmissible torque and rigidity at the rack. In addition, output bearing consists of two preloaded and substantially oversized angular contact roller bearings.
This exclusive design offers exceptional compound stiffness which allows to dramatically decrease the radial bending (up to 60% of the overall distortion) and to increase the natural frequencies of the global Racks & Pinions drive systems.
Designed as an association of two high-tech planetary reducers, KRPX allows perfect mounting on both sides of the machine frame and enables true zero backlash when coupled with an electrical preload system.
Available in 3 standard universal sizes (2, 3 and 4) KRPX is very compact, a definitive advantage for helping implementation with respective pinion height not higher than 104, 127 and 148 mm.
With this new and innovative concept, the machine-tools designers can easily expect to exceed market standards with maximum feed capacity up to 105 000 N and stiffness on the rack up to 333 000 N/mm.
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Nexen offers an advanced new technology that revolutionizes linear motion. The Roller Pinion System (RPS) provides zero backlash, very high positional accuracy, unlimited length, very high speeds, 99% efficiency, high rigidity, low noise, low maintenance, corrosion resistance, and long life. This opens up
new design possibilities and provides the capability to achieve much higher levels of performance in machine designs.
The RPS's unique design eliminates many of the limitations of current linear drive systems like:
Ball Screws: Limited by critical speed, maximum speed, cumulative error, vibration, thermal expansion, supplemental cooling, noise, low efficiency, maintenance, and life.
Traditional Rack and Pinion: Limited by low accuracy and speed, backlash, tooth fatigue, noise, high cost of dual and split pinion systems, high maintenance, and short life.
Belt Drives: Limited by low accuracy, backlash, low load capacity, short lengths, belt stretch, and low rigidity.
Linear Motors: Limited by low load capacity, high cost, strong magnetic fields, and liquid cooling.
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Dedicated to racks & pinions drive applications, the KRP+ design is based either on the use of one single unit or on the association of two top quality planetary reducers, mounted in parallel on the machine main frame.
When used as a SingleDRIVE, the KRP+ gives the benefit of an ultra high stiffness feed gearbox, dedicated to high performances rack & pinions drive systems.
When choosing the mechanical preload solution, the KRP+ become a DualDRIVE unit, which achieve the true backlash free feature by torsionally winding one pinion against the other through the rack.
Immediate benefits are to need only one motor, and to dramatically simplify the motor control.
When choosing the Electrical preload solution, the KRP+ is used as a TwinDRIVE unit, where the backlash is cancelled by the opposite torque balance between the two pinions, according with the two motors and drives remote control.
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Dedicated to racks & pinions drive applications, the DRP+ design is based on the association of two top quality planetary reducers, mounted in parallel on an extra high stiffness universal frame.
When choosing the mechanical preload solution, the DRP+ become a DualDRIVE unit, which achieve the true backlash free feature by torsionally winding one pinion against the other through the rack.
Immediate benefits are to need only one motor, and to dramatically simplify the motor control.
When choosing the Electrical preload solution, the DRP+ is used as a TwinDRIVE unit, where the backlash is cancelled by the opposite torque balance between the two pinions, according with the two motors and drives remote control.
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MIJNO PRECISION GEARING utilizes the highest performance, newest generation equipment for the production and control of your transmission components. Our expertise has earned the trust of robotic, medical, military, nuclear and aerospace industries. Our 120 machine-tools are used by more than 75 highly skilled workers that learn continuously the most innovative technologies. We are certified ISO 9001.
Precise manufacturing provides very precise pitch-line location and minimal cumulative error per meter. Hardened or not-hardened teeth available. Precision matching pinions in your preferred geometry are a specialty.
- Cutting: mod. 0.5 to 18; L max. = 2100 mm ; ISO 7
- Grinding: mod. 0,5 to 18; L max. = 2100 mm ; ISO 5 to 6
Try our patented Rotaxe® tooth profile for your high speed applications.
Send us your drawings for quotation at mijno@aol.com or by fax at +33.4.77.43.74.44
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MIJNO PRECISION GEARING utilizes the highest performance, newest generation equipment for the production and control of your transmission components. Our expertise has earned the trust of robotic, medical, military, nuclear and aerospace industries. Our 120 machine-tools are used by more than 75 highly skilled workers that learn continuously the most innovative technologies. We are certified ISO 9001.
Precise manufacturing provides very precise pitch-line location and minimal cumulative error per meter. Hardened or not-hardened teeth available. Precision matching pinions in your preferred geometry are a specialty.
- Cutting: mod. 0.5 to 18; L max. = 2100 mm ; ISO 7
- Grinding: mod. 0,5 to 18; L max. = 2100 mm ; ISO 5 to 6
Try our patented Rotaxe® tooth profile for your high speed applications.
Send us your drawings for quotation at mijno@aol.com or by fax at +33.4.77.43.74.44
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Cross & Morse offer a comprehensive range of standard stock gears which, coupled with the capability to supply on short lead times custom designed gears, provides the design engineer with a wide spectrum of solutions from which to select open gear drives.
Bevel and Mitre Gears
Straight Cut Bevel and Mitre Gears manufactured to the Modul system in medium carbon steels enable simple right angle drives with reduction ratios up to 4:1. Two series of gears are offered, the first the original T.D. Cross range to imperial dimensions from 16DP to 5DP pitch, the second a much improved metric range of gears from 1 Mod. to 5 Mod. pitch. All gears can be induction or flame hardened for longer life under arduous conditions.
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Large Selection of Modules, Gear Ratios, Materials and Styles!!
KHK stock bevel gears are available in two types, spiral and straight tooth, in gear ratios of 1.5 to 5, and are offered in a large variety of modules, numbers of teeth, materials and styles.
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QTC offers all types of Bevel Gears
Ground Spiral Bevel Gear
Stainless Steel Bevel Gear Metric Bevel Gear
Plastic Bevel Gears
Injection Molded Bevel Gears
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We manufacture bevel gears klingenberg type HPG methods . max diameter 1200mm, max face width 180mm, normal modul from 6 to 23
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Ground Spur Gears/Ground Racks
Precision grade:
JIS Grade N7 (JIS B 1702-1:1998)
JIS Grade 3 (JIS B 1702:1976)
JIS Grade N7 (JIS B 1702-1:1998)
JIS Grade 3 (JIS B 1702:1976)
KHK R 001 grade 1
Gear teeth : Standard full depth
Pressure angle : 20
Material S45C (Carbon steel) ; SCM440 (Alloy steel)
Heat treatment:
Induction hardened teeth
Tooth, induction hardened after normalizing
Normalizing only
Core hardness: HB165194 ; HB225260 ; HB250285
Surface hardness : HRC4853 ; HRC4853
Surface treatment : Black oxide except ground surfaces
Surface finish Ground
Datum reference surface for gear cutting and grinding:
Bore
Shaft(Ground portion)
Bottom surface
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QTC offers all types of Helical Gears. Detailed below are Ground Axial Helical Gears and Hobbed Normal Helical Gears.
Ground Helical Gears
Precision grade JIS Grade N6 (JIS B 1702-1:1998); JIS Grade 2 (JIS B 1702:1976)
Heat treatment Normalized, teeth surfaces induction hardened
Reference section of gear Rotating plane
Core hardness HB225260
Gear teeth Standard full depth
Surface hardness HRC5055
Transverse pressure 20
Surface treatment Black oxide except ground surfaces
Helix angle 2130'
Surface finish Ground
Material SCM440 (Alloy steel)
Datum reference surface for gear grinding Bore
Helical Gears
Precision grade JIS Grade N8 (JIS B 1702-1:1998) ; JIS Grade 4 (JIS B 1702:1976)
Heat treatment -
Reference section
of gear Normal plane
Core hardness HB165194
Gear teeth Standard full depth
Surface hardness HB165194
Normal pressure angle 20
Surface treatment Black oxide
Helix angle 15
Surface finish Cut
Material S45C (Carbon steel)
Datum reference surface for gear cutting Bore
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To meet your requirements, KHK stock gears are made in a variety of types, materials, configurations, modules and numbers of teeth. We also offer products that allow secondary operations to be performed on the bores, shafts, outside diameters, keyways and set screws.
Products available :
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Plastic Spur Gear
Precision grade :
JIS Grade N9 (JIS B 1702-1:1998)
JIS Grade 5 (JIS B 1702:1976)
Core hardness HRR115120
Gear teeth Standard full depth
Surface hardness -
Pressure angle 20
Surface treatment -
Material MC901 Nylon
Surface finish Hobbed
Heat treatment -
Datum reference surface for gear cutting Bore
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Straight Racks
Available in standard lengths of 0.5, 1.0, 2.0 and 3.0 metres is a range of 20° PA straight cut racks with pitch range 1 Mod. to 8 Mod. These are designed to combine with the standard spur gears to provide low cost conversion of rotary to linear motion.
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With Our Large Selection of Standardized Products,
We Can Meet All Your Precision Linear Motion Requirements!!
KHK stock racks are made for high precision linear motion applications. We offer a large variety ranging from module 0.5 to 10 and lengths from 100 to 2000mm. Please use corner racks (SSR and SIR series) when you want to change the direction of linear motions.
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QTC offers all types of Racks and Pinions
CP Ground Spur Gears & Racks
CP Spur Gears
CP Racks
CP Stainless Steel Spur Gears
CP Stainless Steel Racks
CP Round Racks
CP Metal Flexible Racks
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With Our Large Selection,
You Can Find Suitable Gears for Almost Any Application!!
To meet your requirements, KHK stock gears are made in a variety of types, materials, configurations, modules and numbers of teeth. We also offer products that allow secondary operations to be performed on the bores, shafts, outside diameters, keyways and set screws.
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Spur Gears
QTC offers all types of Spur Gears
Ground Spur Gear
Metric Spur Gear
Hubless Spur Gears
Fairloc Spur Gears
Plastic Spur Gears
Steel Spur Gear
Injection Molded Spur Gears.
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he David Brown worm gear range comes in Single Reduction worm gears which are based on a single universal case for each size, giving a high degree of common parts and interchange ability. Our Double Reduction worm gears are ideal for fitting to slow moving machinery and are constructed using two single reduction worm gear units connected together.
David Brown worm gears are also available for washdown environments and can also be shaft mounted units which are directly mounted to the driven shaft dispensing with connecting couplings and baseplates . The standard and Heavy Duty worm gears are ideal for stirrer and cooling tower units where a larger lower bearing and increased shaft size are needed to add extra unit capacity and absorb higher shaft and bearing loads.
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Available in Speed Reduction Ratio 1/10 to 1/120
in Many Materials and Styles!!
The simplest way to obtain a large speed reduction with high torque in a compact space is with worm gear drives. KHK stock worms and worm wheels are available in modules 0.5~6 and in speed ratios of 1/10~1/120, made in a variety of materials and styles. We also offer stock duplex worms and worm wheels with which you can obtain a very low backlash, high rotational precision system.
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QTC offers all types of Worms and Worm Gears
Duplex worms
Ground Worm Shafts
Ground Worm Gears
Bronze Worm Gears
Plastic Worm Gears
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Bevel and Miter Gears
* Used for transmission of power of motion between 90° intersecting shafts
* Spiral Bevel and Miter gears are hardened for longer life
* Spiral Bevel Gears have continuous pitch line contact and therefore run more smoothly and quietly than straight tooth gears
* Large ratios available from stock for flexible design
* Meets AGMA quality standards
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Bevel gears
* Bevel gears, milled, straight spur toothed up to module 1,4; Ø 100 mm
* Bevel gears, planed, straight spur toothed up to module 2; Ø 120 mm
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Straight Bevel Gears
As their name suggests, Straight Bevel Gears have a straight tooth geometry, which if extended, would pass through the point of intersection of their axes.
Arrow’s size range and capabilities for Straight Bevel Gears are provided in the table below.
Maximum Pitch Diameter – 28”
Diametral Pitch – 2.5 – 48
Face Width – 6.0
Unground Tooth – AGMA Q9
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Worm and Thread shafts
Worm and Tread shafts,
precision-milled up to module 2
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A ground rack, with quenching treatment applied to tooth surface. Module 0.5 and 0.8, and 6 racks are available. Tooth areas, where size is less than 0.8 module, has no quenching treatment.
Models: 0.5, 0.8, 6
Total Length: 300, 500, 1000
Precision grade: KHK R 001 grade 3
Gear teeth: Standard full depth
Pressure angle: 20°
Material: S45C
Surface hardness: HRC45 - 55
Surface treatment: Black oxide except gear tooth
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Arrow Gear Company was the first gear manufacturer to offer ground tooth spiral bevel gears from stock. The most popular sizes of 1:1 and 2:1 ratios are currently available for timesaving, off-the-shelf delivery.
Every stock ground tooth gear is designed and manufactured to fulfill the following requirements for discriminating gear buyers.
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A Helical Gear has a cylindrical pitch surface with teeth having a helical orientation.
Maximum Pitch Diameter – 20”
Diametral Pitch – 3.0 – 48
Face Width – 13.0
Unground Tooth – AGMA Q9
Ground Tooth – AGMA Q13
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Helical Gears
* Used for transmission of power of motion between non-intersecting shafts
* Long tooth lead provides quieter and smoother gear mesh
* Many Helical gears are hardened for longer life
* They are made in right and left hand 45° Helix Angle with 14 1/2° P.A.
* Helical Gears of the same hand operate at 90° for motion transfer
* Helical Gears of opposite hand operate on parallel shafts
* Recommended for high speed, high torque applications where pitch velocities exceed 1,000 FPM, up to 2400 RPM
* Helical Gears operating on parallel shafts provide a stronger, smoother and quieter running drive than spur gears of the same pitch and size
* Meets AGMA quality standards
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