On the Made-in-China agricultural-gear listing the visible quoted range runs from US$0.50–4.99 per piece at 100-piece MOQ for die-cast aluminum grades (A413 / AlSi9Cu3) and US$12.65–12.80 per piece at 100-piece MOQ for higher-tier finished steel gearing [S1]. That is the cleanest mid-2026 public benchmark for low-to-mid complexity industrial gears out of Chinese OEM channels.
Replacements for handheld power tools sit in a different band: a Makita HR2230 spur gear (part 227182-5) lists at INR 487 against a sticker of INR 487 with no current discount on Industrial Shoppy, while the same seller's 3M 9002 respirator spans ₹26–₹1,900 depending on variant [S3]. For an engineer, that split matters: agricultural and bulk industrial gears are quoted by the hundred-piece MOQ, while service/spare gears are individually kitted and follow a different cost stack.
Where the 2026 price bands sit
Three price tiers dominate the public mid-2026 industrial gear market. Tier 1, agricultural and light-industrial cast gears: US$0.50–4.99 per piece at 100-piece MOQ, aluminum die-cast, permanent-mold or sand-cast, no finish-machining on the teeth [S1]. Tier 2, general-purpose steel spur and helical gears out of audited Chinese suppliers: roughly US$2.50–12.80 per piece, still at 100-piece MOQ, ISO 9001 factory audits standard on the platform [S1]. Tier 3, finished module-class gearing to AGMA 2001 / ISO 1328 tolerance bands: usually US$15–80 per piece for small modules, climbing past US$200 once case-hardening, grinding and inspection reports are added — a range consistent with the Worm Gear Reducer 2026 Price & Cost Guide torque-band data for mated gearboxes.
The visible spread is not noise. On the same Made-in-China results page a US$0.50 die-cast part and a US$12.80 finished steel part are both stamped "100 Pieces (MOQ)" and both sit under "Agricultural Gear" [S1]. Same search term, tenfold price gap, two different tolerance classes — which is exactly why buyers who compare by SKU name alone get the wrong number.
What actually moves the cost: material, module, tolerance, batch
Material is the first lever. Aluminum A413 / AlSi9Cu3 die-cast gears land in the US$0.50–3.00 band because the alloy is cheap, the cycle time is short, and the tooth is net-shape from the die [S1]. Mid-carbon steel (C45 / 1045) gears, even rough-machined, sit a tier above because forging or bar-stock feeding plus hobbing adds machine time. Case-hardened 20MnCr5 / 8620 sits higher again — typical of the AGMA 9–10 class gearing referenced in the Gear Selection 2026 service-factor walkthrough.
Module and tooth tolerance are the second lever. A module 1.5–2 spur gear can be hobbed in one pass; a module 4+ helical or bevel gear needs a different machine class, often a chamfering and shaving pass, and that adds labour cost per tooth.
Batch size and finish are the third lever. The 100-piece MOQ is the floor on Made-in-China's bulk listings [S1]; dropping below it pushes unit price up sharply because the same setup labour amortises across fewer parts. Surface finish (black oxide, phosphating, zinc plating, Dacromet) is normally an add-on quoted per kg or per piece and is rarely bundled into the headline number. For a process engineer reading the listing, treat the headline as a "bare gear, no finish, FOB China port" number and add the rest as a separate line item.
Who this pricing is for — and who it is not for
The US$0.50–12.80 band [S1] is the right reference for OEM buyers specifying agricultural machinery, low-speed conveyors, packaging lines, and light-material handling — applications where the gear is replaceable, the duty cycle is moderate, and tooth accuracy is not the limiting factor on machine life. It is also the right reference for aftermarket channel buyers (the INR 487 Makita-class spare gear [S3] falls in the same per-piece cost stack once currency and distribution are normalised).
It is the wrong reference for precision motion control, machine-tool spindles, robotics, and aerospace accessory drives, where ISO 1328 grade 5 or better, AGMA 2001 class 11+, case depth to 0.8–1.5 mm, 100% tooth-flank inspection, and a PPAP / ISIR dossier are required. For those buyers, the industrial gear cost stack starts at grinding-and-inspection, not at casting or hobbing, and per-piece prices are negotiated against a print, not a catalog row.
Comparison: agricultural cast vs steel rough vs finished class gearing
On three decision criteria the 2026 mid-tier bands line up as follows. Cost per piece at 100 MOQ: aluminum die-cast US$0.50–3.00, rough-machined steel US$2.50–12.80, finished case-hardened steel US$15–80+ for small modules [S1]. Typical ISO 1328 grade: die-cast roughly grade 10–11 (tooth profile only as-cast), rough steel 8–9, finished steel 6–7 after grinding. Typical application ceiling: die-cast for low-RPM, low-shock agricultural drives; rough steel for general industrial gearboxes; finished steel for any application where noise, backlash under load, or AGMA service factor above 1.5 is specified. The same logic — material and tolerance class drive the multiple — is what makes the worm-gear reducer cost stack legible in the worm reducer pricing reference.
Sourcing channels and the unit-economics trap
Made-in-China's Gold / Diamond / Audited Supplier badges (ISO 9001 audit on file) are the closest thing to a quality gate on a public B2B portal [S1], and they correlate with the seller's willingness to provide material certificates and dimensional inspection reports. Trading-company listings (marked "Trading Company" on the same page) usually sit at the bottom of the price band but add a 5–15% margin and offer less control over the actual foundry [S1]. For a 100-piece prototyping run, the trading-company route is fine; for any production batch above 1,000 pieces per month, going direct to the audited factory is where the real cost is.
Indian B2B portals (Industrial Shoppy and similar) price in INR with no MOQ on small spare parts [S3], which is useful for one-off replacements and field-service stock but is not a sensible benchmark for OEM cost engineering. The conversion math is also punitive: INR 487 at mid-2026 rates is roughly US$5.80 per piece, but that includes Indian domestic margin, GST, and single-piece picking — none of which apply to a 1,000-piece OEM PO out of China.
Standards and inspection language to pin on the PO
Two spec lines do most of the work on a 2026 industrial-gear PO. First, material callout plus hardness profile: e.g. "20MnCr5 case-hardened to 58–62 HRC, case depth 0.8–1.2 mm to ISO 6336-3 / AGMA 2001 class 10". Second, tooth accuracy class plus inspection scope: e.g. Both lines convert catalog headline pricing into a defensible buy, and they map cleanly onto the industrial gear reference page for engineers who need to anchor the spec language. [S1]
For lower-tier agricultural and conveyor gearing, ISO 1328-1 grade 9–10 and a simple mill certificate are usually sufficient — and the supplier tier that delivers this is exactly the US$0.50–4.99 bracket on the Made-in-China listing [S1]. Over-specifying a farm-equipment bevel gear to grade 6 is a common procurement error and shows up as a 3–4× cost premium with no field-life benefit.
Limitations and failure modes in the public price data
Public B2B listings are FOB-port, ex-works, and exclude tooling amortisation on the first PO. A custom die for an aluminum die-cast gear is typically US$2,000–8,000 amortised over the MOQ, which is invisible in the per-piece number [S1]. Surface treatment (zinc flake, black oxide, Dacromet) is almost always a separate line, and so is the inspection report.
The headline figures also flatten material volatility. Steel and aluminum prices move monthly, and 2026 has not been a flat market; locking a six-month price on a high-volume gear PO is standard practice and will not match the spot listing you see on the day of enquiry. The same applies to currency: a US$-denominated quote from a Chinese supplier in mid-2026 is only as good as the RMB/USD pair on the day the PO is confirmed.
Trackable signals for the rest of 2026: AGMA and ISO 1328 committee activity on grade 5 and below for high-precision industrial gearing, and any move by major Chinese suppliers to bundle inspection reports as standard on sub-US$5 cast gears — both would compress the visible spread in the industrial gear market and reshape the per-piece cost stack that mid-tier buyers currently use.
For component-level specifications, see linear guide, and crossed roller guide.