The global linear module supplier base visible on Directindustry splits cleanly along drive technology: 12 manufacturers list belt-drive modules across 54 catalog entries, 15 list ball-screw modules across 50 entries, and the broader modular category aggregates multi-axis, gantry and rack-and-pinion variants in the same single-axis and multi-axis split [S1][S2][S3].
European suppliers are concentrated in Germany, France, Italy and Switzerland — Bosch Rexroth, Schaeffler/Ewellix, KML Linear Motion Technology, NTN Europe, FLI (France Linéaire Industrie) and Michaud Chailly — while the Chinese cluster on the same index pages is anchored by FUYU Technology, Grand Growth, Lim-Technology, Jiangsu DINGS' Intelligent Control Technology, Schaeffler's China-listed units, and Shanghai/Guangzhou packagers such as GUANGZHOU LINK [S1][S2][S3]. A 2026 supplier profile confirms Lishui City Yongrun Precision Machinery has been building linear motion components in Zhejiang since 2002 on a 28,000 m² site with more than 200 staff, exporting via its cnballscrew.com channel [S4].
Drive Type Mix and What It Tells the Buyer
Belt-drive modules dominate long-stroke, high-speed pick-and-place — the 54-product belt-drive index includes Nadella, Güdel and FUYU alongside Bosch Rexroth, with stroke and speed filter ranges on Directindustry set in millimetre and millimetre-per-second bands for direct comparison [S1]. The 50-product ball-screw index, where 18 of 21 modular products are ball-screw driven, points to higher thrust, lower speed and better positioning repeatability — the typical fit when a linear module must push a payload against a process load rather than stroke quickly [S2][S3].
The modular-class index layer is the buyer-relevant one: 30 of 31 catalog entries are guided, 28 of 31 use an aluminum profile, 13 of 31 are gantry-form, and exactly 1 of 31 is pneumatic, with the 1-axis / multi-axis split sitting at 33 / 33 [S2]. That ratio reflects the standard palletising-automation build, where a Y-axis ball-screw module rides on an X-axis belt-drive gantry — the configuration most Chinese system integrators ship into European warehouse automation.
Tier-1 vs Tier-2 vs Trading Floors
Tier-1 (engineering-led, in-house rail and screw production) on the Directindustry indices is Bosch Rexroth, Schaeffler/Ewellix, NTN Europe, KML, FLI, Güdel and Michaud Chailly — companies that publish catalog life calculations, lubrication intervals and ATEX/IECEx-rated options for hazardous-area machinery [S1][S2][S3][S6]. Schaeffler's own product page for the linear modules family positions the company "amongst the leading manufacturers and suppliers," with linear systems sold under both the Schaeffler and Ewellix brands since the 2023 brand migration [S6].
Tier-2 (assemblers of bought-in rails, screws and motors) on the index includes FUYU Technology with 9–15 product rows across the three drive types, Grand Growth with 6–16 rows, Jiangsu DINGS' Intelligent Control Technology, GUANGZHOU LINK Automation and Lim-Technology — these are the suppliers that a sourcing manager reaches when the spec is standard 1-axis, stroke under 2 m, repeatability around ±0.01 mm and lead time is the binding constraint [S1][S2][S3]. Tier-3 is the trading/used channel: Alibaba's 16 mm linear guide rail listing returns "300+ products from global suppliers" under a single keyword, and made-in-china.com shows Shenzhen Xiangkailong Technology advertising linear motion modules, linear guides and screws from a single Shenzhen showroom under ISO 9000 [S5].
Material, Profile and Sourcing Levers Buyers Should Track
Aluminum profile is the dominant structural material — 28 of 31 modular index entries use it — because a 6061/6063-T6 extruded body keeps moving mass low enough for the linear motor and belt-drive classes to hit their rated speed bands [S2]. Where the structural member is steel (heavy-payload gantries, machine-tool Z axes) the supplier list narrows to Tier-1 makers such as Güdel and Bosch Rexroth whose welds and surface treatments are documented per shipment.
Second lever is the rolling element inside the carriage. A catalog row specifying ball screw drive on a 1-axis guided aluminum module typically pairs with an HGR/HGH-class linear guide of 15, 20 or 25 mm rail width; switching to a crossed-roller pair on the same envelope trades speed for moment stiffness and is the typical upgrade for metrology and semiconductor-handling frames, as discussed in our crossed-roller guide sizing reference. Third lever is encoder choice — incremental on the motor, absolute optical on the load-side linear encoder, or open-loop stepper with no feedback — and the linear module maker map above shows most Tier-2 catalog rows leave encoder selection to the integrator.
Comparison: Belt-Drive vs Ball-Screw vs Rack-and-Pinion
On four buyer-relevant criteria, the three drive types separate cleanly: (1) maximum speed — belt-drive typically peaks in the 1–5 m/s band for catalog gantries, ball-screw modules sit in the 0.2–1.0 m/s band, and rack-and-pinion sits in the 1–3 m/s band for long-stroke units; (2) thrust/load capacity — ball-screw wins at compact envelope, rack-and-pinion wins for long-stroke heavy payloads, belt-drive is lowest per unit envelope; (3) positioning repeatability — ball-screw modules reach ±0.01 mm with a ground screw, belt-drive modules typically land at ±0.05 mm, rack-and-pinion at ±0.02–0.05 mm depending on pinion quality; (4) maintenance — belt-drive is a wearing part (typical 20,000-hour belt life under rated load), ball-screw needs periodic lubrication, rack-and-pinion needs pinion and rack-lubrication monitoring [S1][S2][S3]. The 21 belt-drive vs 18 ball-screw vs 1 rack-and-pinion product split on the modular index is the simplest read of where the market actually is buying in 2026 [S2].
Standards, Compliance and Documentation Signals
Tier-1 catalogs align with ISO 230/ISO 230-2 for positioning accuracy and repeatability tests, DIN 620-4 / ISO 15312 for bearing-life calculation on the rolling-element path, and ISO 3408 for ball-screw acceptance — values a sourcing engineer can call out in the technical schedule rather than accept from the data sheet alone. For European hazardous-area builds, ATEX 2014/34/EU conformity on the linear module as a complete unit (not just the motor) is the differentiator that separates Tier-1 from Tier-2 documentation sets [S6].
For the Chinese cluster, ISO 9000 / ISO 9001 is the floor: Shenzhen Xiangkillong's made-in-china profile states "Management System Certification: ISO 9000" alongside its linear motion module, linear guide and screw line, which matches the documentation depth the catalog buyers can audit before issuing a PO. Yongrun's 28,000 m² site in Lishui and 200+ headcount sit in the same compliance band and supply direct via cnballscrew.com to OEM and integrator channels [S4].
What to Watch Through 2026
Two trackable signals stand out for the rest of 2026: first, watch the Schaeffler/Ewellix brand migration for linear actuator catalog rollouts — the merged product page went live at ewellix.com and is being progressively relabelled on the Schaeffler side, so spec sheets under either name should be cross-checked against the master part number [S6]. Second, watch the China cluster for encoder integration — more Tier-2 rows are bundling absolute linear encoder readheads on the load side rather than relying on motor-side feedback, which closes one of the long-standing gaps versus Tier-1 Japanese and German rivals on the Directindustry index [S1][S2][S3].