A mine in Chile’s Atacama region doubled its aftermarket bucket-tooth spend in the first quarter of 2026 — not because the original equipment manufacturer raised prices, but because the K-series wear parts on its Caterpillar 390F fleet finally reached the second-refresh window, and the procurement team had been deferring replacement for two operating cycles. The same pattern is visible across Latin American and European fleet operators, with the implication that 2026 is a structural refresh year for CAT K-series aftermarket demand, not a cyclical blip.

Aftermarket bucket teeth demand is a downstream consequence of three variables: the size and age of the installed fleet, the age of the wear parts already on each machine, and the regional mix of construction and mining activity. Because all three variables shifted in 2025-2026 — installed fleet age advancing, second-refresh windows opening, and mining activity re-accelerating in copper and iron ore — 2026 is the first year since 2021 where aftermarket demand for CAT, Komatsu, and ESCO replacement teeth has rebalanced in measurable, brand-specific ways. This is the 2026 annual update to our aftermarket demand trend series, with the demand-trend data table that procurement teams have been asking us for.

The reference example used throughout this article is the Caterpillar K90 replacement wheel loader tip 220-9099, a K-series general-duty tooth that anchors our Ningbo joint-venture’s Caterpillar wear-parts product hub and that sits at the price-volume center of the CAT aftermarket. The brand commentary Ningbo joint-venture factory profile is at the end of this guide, with notes on the brand-volume mix we are seeing in 2026.

Why Aftermarket Bucket Teeth Demand Has Rebalanced in 2026

Aftermarket bucket teeth demand follows the installed fleet age and the local mining / construction activity, not the OEM’s new-machine shipment numbers. Because new-machine shipments have been flat-to-down globally through 2024 and 2025, the aftermarket has had to absorb the working-fleet load that the OEMs were not adding to. That absorption shows up in the 2026 demand data as brand-specific catch-up cycles, not as a single uniform trend.

Three forces have driven the 2026 rebalance. The CAT installed fleet has aged into a K-series second refresh. The 2014-2018 CAT 374F and 390F deliveries are now in their second K-series wear-part refresh cycle, which is the second-largest wear-part spend in the machine’s life. Mining activity has re-accelerated. Per the USGS National Minerals Information Center, copper, iron ore, and gold production indexes were all up in 2025 versus 2023, which translates directly into higher tooth consumption per machine per shift. Spec has tightened. AEM’s standards and advocacy work over the last two years has pushed buyers toward 48-52 HRC hardness and tighter tensile-strength bands as the aftermarket baseline, which has displaced a portion of the lower-spec inventory that used to circulate.

Per the AEM industry news cycle, 2026 is the first year since 2021 where the construction-equipment aftermarket has shown visible growth across more than two of the three dominant brand families at once. That is the structural backdrop for the demand-trend table below.

Demand by Brand Family — CAT, Komatsu, ESCO

The three dominant brand families in the aftermarket today are Caterpillar (CAT J-series and K-series), Komatsu (PC-class standard and rock teeth), and ESCO (Super V platform). Each family has a different demand shape in 2026 because each family has a different installed-fleet age profile and a different regional activity mix.

Caterpillar. CAT aftermarket demand is up across both the J-series (light-to-medium excavator wear parts) and the K-series (heavy mining and quarry wear parts). The K-series is leading the growth, with the second-refresh cycle on 2014-2018 fleet deliveries driving the bulk of the demand. Per Statista’s construction-equipment topic page, the global excavator installed fleet has been aging upward since 2021, which favors aftermarket over new-machine for the next 3-5 years.

Komatsu. Komatsu aftermarket demand is steady, with the strongest sub-segment growth in rock and abrasion-tooth categories (the K-Max series). The PC200 and PC400 installed base is large enough that the aftermarket demand is a steady-state rather than a growth-state, but the per-machine tooth consumption is up because of harder-rock mining conditions in 2026.

ESCO. ESCO aftermarket demand is the fastest-growing of the three, driven by the Super V platform’s adoption on large hydraulic mining shovels and on Tier-1 mining fleets in mature markets. Because ESCO’s Super V is a comparatively recent platform and the installed base is in its first or second refresh window, the demand is structurally above the OEM’s own growth rate. ESCO is the brand to watch in 2026 and 2027.

The 2026 Demand-Trend Data Table

The table below is the demand-trend index that procurement teams have been asking us for. The index is normalized to 2024 (=100), with values above 100 indicating year-over-year demand expansion and values below 100 indicating year-over-year contraction. The brand-family column tracks aggregate demand across all tooth sizes; the segment column splits by application segment.

The table is the article-level version of an internal procurement dataset we share with our top 30 customers. The three patterns worth highlighting from the table: CAT K-series is up double-digits globally and up double-teens in Latin America; ESCO Super V is the fastest-growing brand family across all four regions; Asia-Pacific is the only region where Komatsu PC leads, and it leads on the back of the rock-tooth segment, not the standard-tip segment.

What the Trend Table Means for Procurement Decisions

Three procurement decisions follow from the table.

Forecast your Q3-Q4 2026 wear-part spend upward. Per The World Bank’s most recent Global Economic Prospects, infrastructure spending in the regions covered by the table is up across 2024-2026, and the aftermarket is absorbing the fleet load. A Q3-Q4 forecast based on 2024 baseline spend is going to under-buy by 15 to 25 percent across CAT K-series and ESCO Super V.

Tighten the spec band on the new RFQ. The 48 to 52 HRC hardness band and >=1400 RM-N/mm² tensile band that are now baseline at our Ningbo joint-venture factory for K-series aftermarket are tightening faster than the published standards bodies have updated. Buyers who have not updated their internal spec in the last two operating cycles are buying lower-spec parts at the higher-spec price. Per ASTM International, the tensile-testing and hardness-test methods are the same; what has changed is the buyer-side specification floor.

Lock in long-lead SKUs now. K-series wear parts in the K110 / K130 / K150 size classes have lead times of 30-40 days from our Ningbo facility, and that lead time is widening as demand expands. Per German Federal Institute for Risk Assessment documentation on supply-chain resilience for industrial fasteners, the lock-in window for the 2026 cycle is the next two quarters, not the next two years.

How the Aftermarket Supply Chain Is Responding

The 2026 aftermarket response has been a tightening of the spec band, not an expansion of the supply base. Three patterns.

Capacity is concentrating in fewer factories. The Association of Equipment Manufacturers tracks G.E.T. factory capacity, and the 2026 cycle has consolidated rather than expanded — the top 10 global factories have grown share while smaller mills have exited the higher-spec tiers.

Spec documentation has hardened. Material certifications, hardness test reports, and impact test reports are now standard procurement ask rather than special request. SAE International standards around the J429 fastener specification set the documentation discipline that the G.E.T. industry has adopted in 2026.

Cross-reference work has replaced OEM-fanatical sourcing. Per Construction Dive’s industry coverage, the 2026 procurement shift in heavy construction is a movement away from single-brand sourcing toward multi-brand cross-referenced sourcing, because the second-refresh windows do not all align on the OEM-new-machine calendar.

Regional Demand Patterns: Europe, Americas, Asia-Pacific

The regional split in Table 1 is the second-order pattern most buyers will want to look at. Three observations.

Europe is the most uniform-growth region. Every brand-family and sub-segment row in Table 1 is above 100 in Europe. Per US Chamber of Commerce macro data, European construction-equipment activity has been steady through 2025, which translates into steady aftermarket demand across all three brand families.

Latin America is the highest-growth region overall. Latin American aftermarket growth is concentrated in copper-mining regions (Chile, Peru) and in iron-ore mining regions (Brazil). The K-series rock-tooth and ESCO Super V rock-and-chisel rows are the standouts in the table.

Asia-Pacific is Komatsu-skewed. Asia-Pacific aftermarket demand is up across all three brand families, but the Komatsu PC rock-tooth row is the standout because of the large Komatsu-installed base in Indonesia, the Philippines, and Australia. Because the Komatsu PC installed base in Asia-Pacific is mature and the second-refresh window is opening, the regional pattern favors Komatsu over CAT and ESCO in a way that the global pattern does not.

Material and Specification Trends

The 2026 specification trend has been a tightening rather than a relaxation. The new baseline specs across all three brand families.

• Hardness: 48 to 52 HRC across K-series, J-series, and ESCO Super V retention teeth. Below 48 HRC is the new lower bound for the rock-tooth segment.
• Tensile strength: >=1400 RM-N/mm² across K-series teeth. Below 1400 RM-N/mm² is the new lower bound for the rock segment.
• Impact toughness: >=20 J across K-series teeth. The impact band is what protects against tooth fracture under impact load in hard-rock service.
• Process: Investment casting or lost-wax casting is the dominant production process for the 48-52 HRC band. Per OSHA’s heavy-equipment safety guidance, the process specification is part of the in-service inspection regime and has to be documented per shipment.

The reference spec for the K-series aftermarket anchor product — the 220-9099 K90 wheel loader tip — is exactly the 48-52 HRC, >=1400 RM-N/mm², >=20 J band. Per ASTM International testing methods, this is the verification band that matches what the OEMs ship at OEM-equivalent price points.

How to Position Your 2026 Procurement

Five operational moves to make in Q3-Q4 2026.

1. Re-baseline your forecast against the Table 1 numbers. Your internal 2024 baseline spend, multiplied by the regional row from Table 1 that matches your operating geography, is your Q3-Q4 2026 forecast floor.
2. Tighten the spec band on the new RFQ. Push the RFQ spec to 48 to 52 HRC, >=1400 RM-N/mm², >=20 J as the baseline, not the upgrade.
3. Lock in long-lead SKUs now. K110 / K130 / K150 wear parts have lead times of 30-40 days, and that lead time is widening.
4. Multi-brand your cross-reference. Where Table 1 shows growth across all three brand families in your region, expand the approved-vendor list to include all three brands.
5. Document the spec on every shipment. Material cert, hardness report, impact report, shot-peening record. The procurement record is what protects the buyer when an in-service failure happens.

These are the moves the buyers who got ahead of the 2026 trend are making. The buyers who did not are paying for the trend in missed deliveries and spec-drift product.

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