What information do you require to be able to quote?Ronson Gears requires full dimensioned drawings to quote to. If this is not possible please provide as much of the following information as possible in order to quote accurately. - Type of gear: Spur gear, helical gear, straight tooth bevel gear, worm, internal gear or gear rack.
- Material
- Quantity required
- Pressure Angle: this is extremely critical
- Number of teeth
- Face width: length of gear tooth
- Overall length
- Outside diameter
- Bore size
- Boss dimensions: if required
- Keyway dimensions: if required
- Heat Treatment: has the gear been flame hardened, case hardened, nitrided or through hardened?
- Other features? eg drill and tapped holes
What type of gears can Ronson Gears manufacture?We can manufacture spur gears, helical gears, straight tooth bevel gears, worms, internal gears, splines, internal splines and gear racks. Can you manufacture Spiral bevel gears?No, we can not. We don’t have the capability. Do you perform gear design?We usually refer customers to design engineers. Please contact us at
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and we will pass on their details. Are you able to provide horsepower and torque ratings for your stock gears?As there are so many variables within different applications it is very hard to give you a correct figure to work to. As above, we would refer you to design engineers. Do you have a stock range of gears and racks?Yes we do. Please refer to our Stock Gears and Racks page for further information. What material do you use for your stock range?Ronson Gears uses mild steel (CS1020 or S1214) for our racks and K1045 for our stock spurs, mitres and bevel gears. Can Ronson Gears modify my stock gear if required?Yes we can. Please just confirm what you require and we will turn it around as soon as we can for you. How do I get prices for your stock range?Please email us at
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or phone us on +61 3 9555 9822 and we will confirm availability and price for you. Does Ronson Gears manufacture complete or do you gear cut only?We can do either. We have six CNC lathes and CNC milling capability to assist us in the manufacturing process. We have trusted sub-contractors to assist in heat treatment and any other processes that can not be performed in house. What is your minimum batch size?We have the capability to produce production batches down to one offs on our auto loading CNC gear cutting machines. We ask that you supply dimensioned drawings to assist in the manufacturing process to ensure you receive a quality product. What diameters can you gear cut?We can gear cut from as small as 5mm diameter up to 900mm in diameter on either our CNC machines or our conventional gear cutting machines. What diameters can you gear grind?Ronson Gears can precision gear grind up to 700mm in diameter. Our gear grinding is performed on some of the world’s finest CNC precision gear grinding machines. What type of machinery do you use to manufacture your gears?We use state-of-the-art CNC gear cutting and gear grinding machines to manufacture our gears. We also make use of conventional gear cutting machines. Our CNC machines are supplied by Koepfer, Hoefler, Gleason Pfauter, Okuma, Wenzel GearTec, amongst others. How do you gear cut your internal gears?We do this on either our broaching machine or on our vertical gear shaping machines. How do I know I am receiving what I’ve asked for?Ronson Gears utilizes sofisticated CNC Gear Measuring equipment. We provide lead and profile charts to confirm that we have manufactured your gears to your requested AGMA or DIN quality requirements. Can your current gear manufacturer supply this information? What does Module (M) and Diametral Pitch (DP) mean?These are the terms used to identify a gear’s tooth size. Module: is the metric system used to determine tooth size. The bigger the module the bigger the tooth. Diametral Pitch: is the imperial system used to determine tooth size. The bigger the DP the smaller the tooth. Do you have any basic rules or formulas that will help identify what my spur gear is?Please refer to the tables below for spur gear calculations: Diametral Pitch (Imperial)Diametral Pitch is the Number of Teeth to each Inch of the Pitch Diameter. To obtain the | If you have the... | Formula | Diametral Pitch | Circular Pitch | DP = 3.1416 CP | Diametral Pitch | Pitch Diameter and the Number of Teeth | DP = N PD | Diametral Pitch | Outside Diameter and Number of Teeth | DP = N+2 OD | Diametral Pitch | Module | DP = 25.4 Mod | Pitch Diameter | Number of Teeth and the Diametral Pitch | PD = N DP | Pitch Diameter | Number of Teeth and the Outside Diameter | PD = (OD) (N) N+2 | Pitch Diameter | Outside Diameter and the Diametral Pitch | PD = OD – 2 DP | Outside Diameter | Number of Teeth and the Diametral Pitch | OD = N+2 DP | Outside Diameter | Pitch Diameter and the Diametral Pitch | OD = PD + 2 DP | Outside Diameter | Pitch Diameter and the Number of Teeth | OD = N+2 N÷PD | Number of Teeth | Pitch Diameter and the Diametral Pitch | N = (PD) x (DP) | Number of Teeth | Outside Diameter and the Diametral Pitch | N = ((OD)x(DP) – 2 | Module | Diametral Pitch | MOD = 25.4 DP |
Please note: the above formulae relates to standard outside diameters and pitch diameters. Module (Metric)Module represents the amount of Pitch Diameter (mm) per tooth To obtain the | If you have the... | Formula | Module | Pitch Diameter and the Number of Teeth | MOD = PD N | Module | Circular Pitch | MOD = CP 3.1416 | Module | Diametral Pitch | MOD = 25.4 DP | Module | Outside Diameter and the Number of Teeth | MOD = OD N + 2 | Pitch Diameter | Module and the Number of Teeth | PD = MOD x N | Pitch Diameter | Number of Teeth and the Outside Diameter | PD = OD x N N + 2 | Pitch Diameter | Outside Diameter and the Module | PD = OD – 2MOD | Outside Diameter | Module and the Number of Teeth | OD = (N+2) x MOD | Diametral Pitch | Module | DP = 25.4 Mod |
Please note: the above formulae relates to standard outside diameters and pitch diameters. For bevels, worms and helicals we suggest you have these drawn up and send the drawing to Ronson Gears for quotation. Where can I get further information on gears and gear design?A good place to start is with the American Gear Manufacturers Association (AGMA). Their website is www.agma.org. They will guide you in the right direction to source further materials to assist in your designs. Can I tour your facility with my QA representatives?You certainly can. We suggest this to a number of potential customers and they are always pleasantly surprised at the presentation of our plant and our capabilities.
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