Bonfiglioli is a well-established Italian gearbox manufacturer. Their planetary gear units \u2014 the EM, ED, ET, EL, and 311 series \u2014 are specified by OEMs across agriculture, construction, and industrial automation worldwide. So why are an increasing number of equipment manufacturers switching to dimensionally equivalent alternatives? This guide covers the three reasons buyers switch, what to verify before ordering a Bonfiglioli planetary gearbox alternative<\/strong>, and which series correspond to which Bonfiglioli model codes.<\/p>\n Three situations consistently drive buyers to evaluate a Bonfiglioli planetary gearbox alternative<\/strong>:<\/p>\n Agricultural and industrial OEM equipment faces intense price competition in North American and Australian export markets. A 30\u201345% reduction in gearbox cost \u2014 with comparable performance \u2014 directly affects equipment competitiveness and margin. Bonfiglioli pricing reflects their European distribution network and brand premium. A factory-direct dimensional equivalent removes that premium without removing the performance.<\/p>\n<\/div>\n European manufacturer lead times for non-stock configurations run 6\u201314 weeks on standard orders, and longer for custom specifications. Equipment manufacturers with seasonal production cycles \u2014 greenhouse contractors, agricultural machinery OEMs \u2014 cannot absorb 14-week lead times on a drive unit that halts their assembly line. Direct-from-factory alternatives with 4\u201335 day lead times change that equation.<\/p>\n<\/div>\n Bonfiglioli periodically discontinues older model series and migrates to updated frame designations. Equipment manufacturers maintaining machines in the field for 15\u201325 years find that their original gearbox model has been superseded, and the dealer cannot supply a direct replacement. A factory with a maintained cross-reference database can match the original mounting dimensions regardless of whether the model is still in production.<\/p>\n<\/div>\n<\/div>\n The Bonfiglioli planetary range uses a series-and-frame designation system. Understanding which series corresponds to which application category is essential before selecting an equivalent:The table below shows various series, such as: EM serie<\/a>s, ED series, 311 L series, etc.<\/p>\n We do not sell products from Bonfiglioli; we are only using this brand name for convenience in product selection and it does not involve any infringement.<\/p>\n Ordering on model code alone is not sufficient. Three verifications reduce incorrect orders to near zero:<\/p>\n Bonfiglioli model codes encode the ratio in the number suffix. However, ratio values vary between production batches and market variants. Always confirm the ratio from the nameplate on your existing unit \u2014 not from a catalogue page \u2014 before ordering a replacement. A ratio error on a 100:1 unit results in a machine running at the wrong speed even if the gearbox physically fits.<\/p>\n<\/div>\n<\/div>\n Bonfiglioli planetary gearboxes are available with multiple input flange configurations \u2014 IEC B5, IEC B14, hydraulic SAE A\/B\/C flanges, and solid shaft. The input configuration is encoded in the model suffix but may differ from catalogue documentation if the unit was custom-ordered. Photograph the input face of the existing unit to confirm the motor bolt pattern before specifying a replacement.<\/p>\n<\/div>\n<\/div>\n A reputable Bonfiglioli planetary gearbox alternative<\/strong> supplier will provide a dimensional drawing of the proposed replacement unit before you confirm the order \u2014 not after dispatch. This drawing should show bolt circle diameter, shaft diameter, keyway dimensions, housing body length, and all critical mounting faces. If a supplier cannot provide a dimensional drawing before order, treat that as a risk indicator.<\/p>\n<\/div>\n<\/div>\n<\/div>\n The phrase “OEM-spec equivalent” is used loosely in the aftermarket. It is worth being precise about what it means and what it does not mean:<\/p>\n A quality OEM-equivalent supplier will test every unit to rated torque before shipment and provide the signed test certificate as evidence. This is the practical substitute for the Bonfiglioli brand name in a procurement quality audit \u2014 not a claim of identity, but a verified performance confirmation.<\/p>\n Based on orders placed by equipment manufacturers in Canada, Australia, and Europe, the pricing differential for quality Bonfiglioli planetary gearbox alternatives<\/strong> typically falls in the following ranges:<\/p>\n These savings are on list price. Actual discounts from Bonfiglioli distributors vary by volume and relationship, so the effective saving for your specific situation may be higher or lower. The best approach is to obtain a formal quotation from both sources for a direct comparison on the same specification.<\/p>\n The fastest path to a confirmed quotation is to send the nameplate data from your existing Bonfiglioli unit:<\/p>\n Alternatively, photograph the nameplate and email it directly. We cross-reference the model code against our dimensional database and return a confirmed equivalent specification, dimensional drawing, unit price, and lead time within 24 business hours.<\/p>\n <\/p>\n![\"311](\"https:\/\/planetarygeardrive.top\/wp-content\/uploads\/2026\/03\/311-Series-Planetary-Gearbox-1-300x300.webp\" "\\"\\"")
<\/p>\n<\/div>\nWhy OEM Buyers Look for a Bonfiglioli Equivalent<\/h2>\n
Bonfiglioli Series Cross-Reference Guide<\/h2>\n
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\n \nSeries<\/th>\n Description<\/th>\n Equivalent Series<\/th>\n<\/tr>\n<\/thead>\n \n EM series<\/td>\n Inline (coaxial) planetary gearbox<\/a>. Standard industrial and mobile equipment inline drive.<\/td>\n E series (EM sub-series), EP300 inline, 311L inline<\/td>\n<\/tr>\n \n ED series<\/td>\n Right-angle planetary gearbox (bevel output). For applications where 90\u00b0 output is required.<\/td>\n E series (ED sub-series), EP300R right angle, 311R<\/td>\n<\/tr>\n \n ET series<\/td>\n Track drive final drive. For tracked mobile equipment, mini excavators, compact carriers.<\/td>\n E series (ET sub-series), track drive series<\/td>\n<\/tr>\n \n EL \/ EQ series<\/td>\n Winch and slewing drives. For crane winch drums, anchor handling, rope pulling.<\/td>\n E series (EQ sub-series), winch drive series<\/td>\n<\/tr>\n \n 311 L series<\/td>\n 311 frame inline \u2014 311L1 through 311L4 (1\u20134 stage). 35,000 Nm rated. Heavy industrial and crane duty.<\/td>\n EP311L1 \u00b7 EP311L2 \u00b7 EP311L3 \u00b7 EP311L4<\/td>\n<\/tr>\n \n 311 R series<\/td>\n 311 frame right angle \u2014 311R2 through 311R4. 35,000 Nm rated at 90\u00b0 output.<\/td>\n EP311R2 \u00b7 EP311R3 \u00b7 EP311R4<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n 3 Checks Before Ordering Any Bonfiglioli Alternative<\/h2>\n
What “OEM-Spec Dimensional Equivalent” Actually Means<\/h2>\n
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Price Comparison: What to Expect<\/h2>\n
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\n \nBonfiglioli Series<\/th>\n Typical Saving vs Bonfiglioli List<\/th>\n Notes<\/th>\n<\/tr>\n<\/thead>\n \n EM \/ ED series (E10\u2013E160)<\/td>\n 30\u201345%<\/td>\n Most common OEM replacement request<\/td>\n<\/tr>\n \n 311L \/ 311R series<\/a><\/td>\n 35\u201350%<\/td>\n High saving at this torque class<\/td>\n<\/tr>\n \n EP300 series equivalent<\/td>\n 30\u201340%<\/td>\n Full 16 frame size range available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n How to Get a Confirmed Quote for a Bonfiglioli Equivalent<\/h2>\n
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