Descrizione
Precision Is the Art of Removing Movement. A CNC machine does not lose accuracy in a dramatic way. It loses it one component at a time: a belt with a little give, a shaft a few hundredths off centre, a gearbox that hesitates before it turns. Each of those errors is small enough to be forgiven in isolation, and together they become a part that does not fit the drawing. The reduction stage between the servo and the rack is where a builder decides whether the machine will repeat itself for a decade or drift every month.
This unit is a 5:1 gearbox for rack-and-pinion axes, built in 1.25 module and 1.5 module tooth sizes with both straight and helical tooth profiles. Helical teeth carry load more smoothly and more quietly than straight teeth, which matters on a machine cutting continuously for hours. Direction is selectable, so left-hand and right-hand variants mate correctly with the rack you already have. Shaft length is offered in long and short versions, and the pinion pulley bore comes in 12.7mm or 14mm to suit the belt drive from the servo. The gearbox bore is 19mm, sized for 80-frame servo motors, and input speed is rated from 750 to 3000rpm. The housing is precision cast in iron rather than fabricated, which is how a small gearbox holds its centre distance without moving. Each unit ships with the matching belt and small pulley, so the reduction stage arrives as a complete set rather than a list of parts to source elsewhere.
The applications are the ones where the axis is long and the load is heavy: CNC routers and plasma tables driving a gantry along a rack, laser beds with a moving bridge, woodworking machines, stone and glass tables, and any machine with a travel beyond what a ballscrew can carry economically. Builders retrofitting a rack-and-pinion axis, machine shops keeping a spare reduction stage on the shelf, and workshops assembling a first machine all use the same part for the same reason: it removes movement from the axis.
Every hundredth of backlash is a mistake you will make a thousand times.
Key Features
- ✦ 5:1 reduction ratio for rack-and-pinion machine axes
- ✦ Available in 1.25 module and 1.5 module tooth sizes
- ✦ Straight and helical tooth profiles, with left-hand and right-hand drive options
- ✦ Long and short shaft versions to match the mounting arrangement
- ✦ Pinion pulley bore of 12.7mm or 14mm for belt drive from the servo
- ✦ 19mm gearbox bore sized for 80-frame servo motors
- ✦ Input speed rated from 750 to 3000rpm
- ✦ Precision-cast iron housing, supplied with the matching belt and small pulley
Technical Specifications
- Reduction Ratio: 5:1
- Tooth Modules: 1.25 module and 1.5 module
- Tooth Profile: Straight teeth and helical teeth
- Direction Options: Left-hand and right-hand variants
- Shaft Options: Long shaft and short shaft
- Pulley Bore: 12.7mm or 14mm inner hole diameter
- Gearbox Bore: 19mm, suitable for 80-frame servo motors
- Input Speed: 750 to 3000rpm
- Housing Material: Precision-cast iron
- Included: 1 gearbox in 1.25 module or 1.5 module, 1 belt, 1 small pulley
- Motion Conversion: Rotary servo input to linear rack travel through the pinion
- Certification: CE
- Brand: HLTNC
Where It Belongs
This gearbox belongs on every long-travel axis of a CNC machine. Router gantries driven along a rack, plasma and oxy-fuel cutting tables, laser beds with a moving bridge, woodworking and panel-processing machines, stone and glass tables, and retrofit projects where a ballscrew would be uneconomical over the required length. It also suits automation builders constructing a rail-mounted gantry for material handling, and machine shops that keep a spare reduction stage on the shelf so an unplanned failure does not stop the spindle for a week. Wherever a rack runs the length of a machine, this is the part that couples the servo to it.
Frequently Asked Questions
Q: How do I choose between 1.25M and 1.5M?
Match the module to the rack already on the machine. The 1.25 module and 1.5 module pinions are not interchangeable, so the rack tooth size decides it.
Q: Should I choose straight or helical teeth?
Helical teeth are smoother and quieter under continuous load, while straight teeth are simpler and common on older or lighter machines. Either profile is available in the stocked configurations.
Q: Which pulley bore do I need?
The pulley comes with a 12.7mm or 14mm inner bore, so choose the one that matches your servo shaft and belt drive arrangement. The gearbox itself has a 19mm bore sized for 80-frame servo motors.
Q: What comes in the box?
One gearbox in your chosen module, one matching belt, and one small pulley. That gives you the complete reduction stage between servo and pinion.
Q: What input speed can it take?
The unit is rated for input speeds of 750 to 3000rpm, which covers the servo and stepper drive ranges used on router and table axes.
Q: How do I mount the pinion to the rack?
Mesh the pinion to the rack at the correct tooth module, tension the supplied belt between the servo pulley and the gearbox input pulley, and set backlash with the gearbox mounting slots before locking the fasteners.
The EastSupplier Promise
Every unit is inspected before it leaves the warehouse. If a specification on this page does not match what arrives, we cover the return shipping and replace it. English-language support answers within one business day, and replacement parts for this category are stocked so that a working unit stays working.
Customer Reviews
Payment and Security
Le tue informazioni di pagamento vengono elaborate in modo sicuro. Non memorizziamo i dettagli della carta di credito né abbiamo accesso alle informazioni della tua carta di credito.