GEAR APPLICATION GUIDE · BEVEL GEAR · B06

Bevel Gears for Printing and Packaging Machines:
Right-Angle Drives, Register Control and Hygienic Design

Bevel gears in printing and packaging machines solve the fundamental challenge of redirecting power between shafts at right angles in the confined space of a machine frame — an application requirement that spur and helical gears cannot satisfy without a secondary gearbox stage. From the folder-gluer unit drive in a carton production line to the ink duct adjustment drives of a multi-colour offset press, bevel gears provide compact right-angle power redirection with high precision and, in food and pharmaceutical packaging applications, the corrosion resistance required to survive daily CIP cleaning. This comprehensive guide covers bevel gear selection, material specification, register accuracy requirements, and hygienic design for printing press and packaging machinery right-angle drive applications.

20CrMnTi · 316L · C45 · M2–M10
Straight · Spiral · DIN 5–8 · NSF H1
Offset Press · Flexo · Folder-Gluer · Filler

MODULE RANGE

M2 – M10

Printing and packaging machine bevel gear module range. Press ink duct adjusters and register controls: M2–M4. FFS cross-seal jaw drive: M3–M6. Carton folder-gluer main drive: M5–M8. Heavy case packer and corrugator right-angle drive: M6–M10

GEAR FORM

Straight / Spiral

Straight bevel gears for register adjustment and low-speed auxiliary drives where noise is not critical. Spiral bevel gears for main folder-gluer drives, high-speed FFS jaw drives, and any bevel gear drive above 3 m/s pitch line velocity where reduced noise and higher load capacity are required

SHAFT ANGLE

90° Standard

Virtually all printing press and packaging machine bevel gears are 90° shaft angle. Non-right-angle bevel gears (miter bevel 1:1 ratio) are used for pure direction changes without ratio in some press auxiliary drive trains. Custom shaft angles available on request

QUALITY CLASS

DIN 5 – 8

DIN 5–6 for high-precision register drive bevel gears. DIN 6–7 for main folder-gluer and FFS jaw drives. DIN 8 for auxiliary and slow-speed packaging machine bevel gears where register accuracy and noise are not the specification drivers

The Role of Bevel Gears in Printing Press and Packaging Machine Architecture

The layout of a printing press or packaging machine is dominated by the need to deliver power to rotating components (cylinders, rolls, carton mandrels, fill tubes, jaw sets) whose axes are arranged perpendicular to or at right angles to each other and to the machine’s main longitudinal drive shaft. A sheet-fed offset press body drive shaft runs longitudinally along the press; the impression cylinder, plate cylinder, and blanket cylinder rotate on transverse axes perpendicular to the body shaft. Delivering power from the longitudinal body shaft to each transverse cylinder requires either a helical gear train extending around the end of the press (the solution actually used for the cylinder gear train) or bevel gear right-angle drives at each cylinder position. In packaging machines, the situation is even more diverse — FFS jaw sealing systems, carton folder-gluer fold sections, label dispensers, and product infeed screw conveyors all rotate on axes at various orientations relative to the main machine drive shaft, and bevel gears provide the most compact and mechanically direct solution for each right-angle drive requirement.

bevel gears

Korea Ever-Power’s bevel gears for printing and packaging machines are manufactured in 20CrMnTi case carburized (standard for main drive and high-speed bevel gear applications), C45 induction hardened (for auxiliary and slow-speed adjustment drives), and 316L stainless (for hygienic packaging machines in food, dairy, and pharmaceutical environments). The production range covers both straight bevel gears (for register adjustment, position control, and low-speed auxiliary drives) and spiral bevel gears (for main folder-gluer section drives, FFS jaw drives, and any application where the higher noise, lower load capacity, and impact characteristics of straight bevel gears would be disadvantageous). Korea Ever-Power also manufactures miter bevel gear sets (1:1 ratio, 90°) for direction-change-only applications in press and packaging machine auxiliary drives — these are among the highest-volume bevel gear applications in the printing and packaging industry.

Register accuracy in printing press bevel gear drives is a more nuanced specification than in standard industrial bevel gear applications. In a web offset press, the bevel gear drives in the folder section must maintain precise angular synchronisation between the cutting cylinder, folding cylinder, and collection belt — any transmission error in the bevel gear mesh produces a periodic variation in the cut-off register (the position of the fold relative to the print image). At web speeds of 8–12 m/s, the cut-off register tolerance is typically ±0.5 mm, which at the folder cylinder circumference of 600 mm translates to a fold position angular error of ±0.5/600 × 360° = ±0.3° — requiring bevel gear transmission error below 5 mrad peak-to-peak. This is equivalent to the requirement for printing press spur cylinder gears, and for the same reason: DIN 5–6 quality class, spiral bevel tooth form with lead crowning, and matched pair assembly to verify combined TE before installation.

forged bevel gear printing packaging machine Korea Ever-Power — Korea Ever-Power forged 20CrMnTi case carburized spiral bevel gear pair for packaging machine main drive application — M5, ratio 1.5:1, 90° shaft angle, HRC 60–62 tooth surface, DIN 6 quality class. Lapped after grinding to achieve tooth contact pattern covering 60–65% of tooth face under load. Contact pattern verified under blue marking at rated torque before shipment. Tooth transmission error ≤ 4 mrad peak-to-peak confirmed on gear rolling test rig. Used in horizontal FFS flow wrapper cross-seal jaw drive, carton folder-gluer fold section drive, and automatic cartoning machine mandrel drive applications at speeds up to 400 ppm.

Application-Specific Bevel Gear Drive Specifications

DRIVE 01

PRINTING PRESS
FOLDER SECTION

Bevel gear specification: M4–M8, 20CrMnTi carburized, spiral bevel, DIN 5–6, ratio 1:1 to 2:1, contact pattern 60–65% tooth face under rated load. The web offset press folder section uses spiral bevel gear sets to transfer power from the longitudinal folder drive shaft to the transverse cutting cylinder, folding cylinder, and fan delivery system axes. Register requirements at the folder are among the most demanding of any press section — cut-off register tolerance of ±0.5 mm at web speeds above 10 m/s requires spiral bevel gear transmission error below 5 mrad. The spiral bevel tooth form is mandatory (straight bevel gears have impact-loaded tooth engagement that generates TE spikes well above 5 mrad at folder drive speeds). Korea Ever-Power supplies folder section spiral bevel gear replacements for Goss Community, Manroland Geoman, KBA Compacta, and other web press folder section bevel gear applications.

DRIVE 02

CARTON FOLDER-
GLUER DRIVE

Bevel gear specification: M5–M8, 20CrMnTi carburized or C45 induction hardened (depending on speed), straight or spiral bevel, DIN 6–7, service factor 1.25 (smooth electric drive). Carton folder-gluer machines (used for corrugated, folding boxboard, and laminated carton production) use bevel gear right-angle drives at each fold section unit where the fold rollers must rotate perpendicular to the main machine transport direction. The fold section units require synchronised speed across all fold stations to prevent carton distortion — spur gear trains with bevel gear right-angle drives at each station are the standard architecture. At fold section speeds up to 200 m/min, pitch line velocity of the bevel gears is moderate (2–4 m/s) — straight bevel gears are acceptable at these speeds if the transmitted torque is below the spiral bevel’s advantage threshold. Korea Ever-Power supplies folder-gluer section straight and spiral bevel gear sets for all major folder-gluer OEMs including BOBST, BHS Corrugated, Bahmüller, and Martin.

DRIVE 03

FFS CROSS-SEAL
JAW DRIVE

Bevel gear specification: M3–M6, 20CrMnTi carburized or 316L stainless (for food product contact zones), spiral bevel, DIN 6, ratio 1:1 to 1.5:1, NSF H1 lubricant for food applications. The horizontal FFS (flow wrapper) cross-seal jaw drive uses bevel gear right-angle gearboxes to transfer the servo motor drive from the machine frame (where the motor is mounted for access and vibration control) to the transverse cross-seal jaw axes. The jaw bevel gear drive must transmit the peak torque of the jaw closing cycle (which includes the force required to compress the seal jaws against spring resistance and the film seal resistance) plus the inertia torque of accelerating the jaw mass through the rotary jaw cycle — peak torques are typically 3–5× the average seal torque. 20CrMnTi spiral bevel gears with service factor 1.5 are the standard specification for cross-seal jaw bevel drives. In food FFS machines with exposed bevel gearboxes near the product zone, 316L stainless housings and NSF H1 lubricant are mandatory per EU Machinery Directive hygiene requirements.

DRIVE 04

PRESS INK DUCT
REGISTER ADJUST

Bevel gear specification: M2–M4, C45 normalised or 20CrMnTi, straight miter bevel (1:1 ratio), DIN 6–7. Printing press ink duct and register fine adjustment drives use small straight bevel or miter bevel gear pairs to allow the register control handwheel or servo motor — which is accessible from the press operating aisle — to adjust the angular position of the impression cylinder or plate cylinder through a small angular correction. These are low-torque (< 5 Nm), low-speed (< 50 RPM adjustment), low duty cycle applications where gear fatigue life is essentially unlimited and the specification is dominated by cost, compactness, and backlash. Register adjustment bevel gear pairs must have backlash below 0.05 mm to allow fine register correction without lost motion — tighter than standard commercial bevel gears but achievable with DIN 6–7 quality and careful centre distance control at assembly. Korea Ever-Power maintains stock of common register adjustment bevel gear sizes (M2, M2.5, M3, M4, ratios 1:1 and 1.5:1) for immediate shipment to press service engineers without minimum order quantity restrictions.

bevel gear contact pattern printing packaging Korea Ever-Power — Korea Ever-Power bevel gear tooth contact pattern verification — blue marking contact pattern test on spiral bevel gear pair for printing machine folder drive application. Contact pattern under no-load: central 50–55% of tooth face width (typical for spiral bevel gears that spread under load). Under rated torque, the contact spreads to cover 60–65% of the tooth face centrally — the correct pattern for maximum load capacity without edge contact from housing deflection under load. All Korea Ever-Power printing and packaging machine bevel gear pairs are supplied with a contact pattern photograph at rated torque as part of the quality documentation package. Contact pattern measurement is conducted on a dedicated bevel gear test rig at rated torque with the gear pair assembled at the specified mounting distances and pinion offset.

Hygienic Bevel Gear Design for Food Packaging Applications

Food packaging machine bevel gears in or near the product zone face the same hygienic design requirements as hygienic spur gears — 316L stainless material, NSF H1 lubricant, IP67 or IP69K sealing, and EHEDG-compliant housing surface finish. However, bevel gearboxes present additional hygienic design challenges compared to parallel-shaft spur gear housings because of the inherent geometric complexity of the bevel gear right-angle arrangement: the corner geometry where the two shaft openings intersect the housing creates crevices and upward-facing surfaces that trap product residue and cleaning water if not specifically designed for drainage. Korea Ever-Power addresses this in hygienic bevel gearbox designs by using smooth cast stainless housings with radiused internal corners, sloped external surfaces on the housing body, and drain ports at the lowest point of each oil cavity.

STRAIGHT vs SPIRAL BEVEL — PRINTING AND PACKAGING SELECTION GUIDE

USE STRAIGHT BEVEL WHEN:

✓ PLV below 3 m/s at all operating speeds
✓ Noise is not a specification requirement
✓ Gear cost is the primary selection criterion
✓ Register adjustment or slow auxiliary drive (duty cycle <10%)
✓ No axial thrust limitation on shaft bearings
✓ 1:1 ratio miter gear for direction change only

USE SPIRAL BEVEL WHEN:

✓ PLV above 3 m/s, or machine noise spec below 75 dB(A)
✓ Register accuracy requirement ≤ 5 mrad TE
✓ Continuous duty at rated load (folder-gluer, jaw drive)
✓ Higher load capacity required in the same housing size
✓ Smooth torque transmission for film or web tension control
✓ Ratio above 2:1 where contact ratio benefit of spiral is greatest

HYGIENIC PACKAGING ADDITIONS:

✓ 316L stainless bevel gears and housing
✓ NSF H1 PAO lubricant (Klüber Summit WF or equivalent)
✓ EPDM shaft seals for CIP chemical resistance
✓ IP69K sealing for high-pressure washdown (dairy, meat)
✓ No horizontal ledges on housing exterior — full drainage
✓ FDA 21 CFR material declaration for food contact compliance

Korea Ever-Power gear workshop production bevel gear printing packaging — Korea Ever-Power precision gear production workshop — spiral bevel gear hobbing, grinding, and lapping facility for printing press and packaging machine bevel gear production. CNC 5-axis bevel gear grinding machines capable of producing spiral bevel gears to DIN 5–6 quality class in module M2–M16 range. Bevel gear rolling test rig for contact pattern verification and transmission error measurement on all precision bevel gear pairs before shipment to printing and packaging OEM customers. ISO 9001:2015 certified production with individual gear measurement reports and contact pattern photographs supplied with every precision bevel gear pair order.

Frequently Asked Questions — Printing and Packaging Machine Bevel Gears

Q 01

My web press folder section is showing inconsistent cut-off register that varies by ±2 mm. Can the bevel gears in the folder drive cause this, and how do I check?

Folder cut-off register variation of ±2 mm at web speeds above 8 m/s is within the range of what worn folder bevel gears can cause, but must be distinguished from other possible causes before condemning the bevel gears. Diagnosis sequence: (1) Check if the variation is cyclic or random. Run the press at reduced speed (40% of max) and measure 10 consecutive cut-off positions. If the variation reduces proportionally with speed, it is a speed-dependent dynamic effect (likely bevel gear TE). If the variation is the same magnitude at reduced speed, it is a static error (backlash or mechanical play, not TE). (2) Check bevel gear backlash. Lock the cutting cylinder shaft and rotate the drive shaft input to the folder bevel gearbox by hand — measure the angular rotation before the cutting cylinder begins to move. More than 0.3° at the cutting cylinder (approximately 3 mm at a 600 mm circumference) indicates excessive backlash in the bevel gear from wear. (3) Check contact pattern. During a press maintenance access, apply blue marking compound to the bevel gear teeth and rotate through three full cycles under load — the contact pattern should cover 60% of the tooth face centrally. Edge contact on one side indicates housing deflection or bevel gear mounting distance error. Korea Ever-Power can supply matched replacement spiral bevel gear pairs for folder section drives — contact with the press OEM, folder model, and bevel gear dimensions (OD, tooth count, module) for cross-reference identification and quotation.

Q 02

What is the correct installation procedure for replacing a bevel gear pair in a packaging machine FFS jaw drive to ensure correct tooth contact?

Bevel gear installation in an FFS jaw drive requires careful attention to the mounting distances — the axial position of both the bevel pinion and the bevel wheel on their shafts determines the tooth contact pattern and must be maintained within the tolerances specified on the gearbox drawing. Follow this installation sequence: (1) Record original mounting distances before removing the worn gears — measure the distance from the pinion shaft end to the housing face, and from the wheel shaft end to its housing face. These are the reference mounting distances that the replacement gears must restore. (2) Clean all shaft and bore surfaces — remove any rust, burrs, or old gasket material that would prevent the gear from seating at the correct axial position. (3) Install pinion first at the recorded mounting distance, using the same shims or spacers as the original installation. If replacement gears are from a new matched pair, use the mounting distances from the Korea Ever-Power measurement certificate rather than the worn gear positions (worn gears may have shifted axially from their original position). (4) Install wheel at the recorded wheel mounting distance. (5) Check tooth contact under blue marking at no-load — contact pattern should be central on the tooth face (50–55% width) for spiral bevel, or slightly toe-heavy (toward the small end) for straight bevel. (6) Adjust mounting distances by ±0.1 mm increments until the contact pattern is centred. Korea Ever-Power supplies replacement bevel gear pairs with the nominal mounting distance dimensions included in the measurement certificate to facilitate this adjustment.

Q 03

Can Korea Ever-Power supply both metric and inch diametral pitch bevel gears for printing and packaging machines built to North American standards?

Yes — Korea Ever-Power regularly supplies inch diametral pitch (DP) bevel gears for printing and packaging machines originally designed and built to North American (AGMA) standards, which use the diametral pitch (teeth per inch of pitch diameter) system rather than the DIN metric module system. Common inch DP sizes encountered in North American packaging and printing machines: 6 DP, 8 DP, 10 DP, 12 DP, 16 DP, 20 DP (equivalent approximately to M4.2, M3.2, M2.5, M2.1, M1.6, M1.27 metric). Korea Ever-Power manufactures inch DP bevel gears to AGMA 2003 standard in straight and spiral bevel tooth form, in the same material range as metric bevel gears (steel C45 or 20CrMnTi, stainless 316L). When ordering inch DP bevel gears, specify: diametral pitch (DP), number of teeth on pinion and wheel, pressure angle (20° standard or 14.5° on older equipment), shaft angle (90° for most applications), face width, bore diameter and keyway, helix angle (if spiral bevel). Korea Ever-Power can also convert inch DP bevel gears to the nearest metric module equivalent if the customer prefers metric replacement — contact with the original gear specifications for a confirmation that the metric module conversion maintains the original pitch diameter and centre distance.

Explore Korea Ever-Power Gear Categories

Seven precision gear product lines for printing, packaging, food processing and industrial applications worldwide.

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DIN 4–5 · printing press · matched pairs

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Low noise · packaging · beverage OEM

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Worm Gears

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Internal · indexing · planetary stage

Planetary Gears

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Plastic Gears

POM · FDA · food safe · light drives

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Need Bevel Gears for Printing or Packaging Machines?

Korea Ever-Power manufactures 20CrMnTi, C45, and 316L stainless bevel gears for all printing press and packaging machine right-angle drive applications — web press folder sections, carton folder-gluers, FFS jaw drives, register adjustment miter gears, and hygienic food packaging bevel gearboxes. Straight and spiral bevel, metric and inch DP, DIN 5–8 quality class. Contact pattern certificate included. Cross-reference for BOBST, Goss, Manroland, KBA and all major OEMs. ISO 9001:2015 certified.

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Bevel Gears for Printing and Packaging Machines: Right-Angle Drives, Register Control and Hygienic Design