SEW Equivalent Gearbox Review
This page is a comparison entry for buyers who search by an installed R, S, K or F designation. It is not a statement of affiliation, and it is not a dimensional compatibility promise. The practical value is to start a controlled replacement review with the designation, duty and existing-unit evidence in one place.
What the designation comparison can establish
Same designation system (R/S/K/F + frame size). Comparable torque, ratio and power envelope.
The confirmed HaoRan catalogue envelopes are listed below by family and frame. They help a buyer identify a plausible product family before contacting us. They do not prove shaft dimensions, flange hole pattern, housing position, mounting surface, output geometry or installed clearances.
What must be confirmed before order
Send us the nameplate of your existing unit and we will confirm the mounting dimensions before you order.
Please add photos of the installed drive, the driven machine and the available mounting space. This gives the technical review the evidence needed to distinguish a designation-level comparison from a machine-level fit decision. If the original installation information is incomplete, we will state which drawing or dimension needs to be checked rather than infer it from the product name.
R family frames
| Frame | Observed variants | Torque envelope | Ratio envelope | Power envelope | Weight envelope |
|---|---|---|---|---|---|
| R17 | R, RF | 7–104 N·m | 3.83–82 | 0.12–0.37 kW | Not yet transcribed |
| R27 | R, RF | 26–157 N·m | 3.37–124 | 0.12–2.2 kW | 4.0 kg |
| R37 | R, RF | 35–245 N·m | 3.41–135 | 0.12–2.2 kW | 10.0–12.0 kg |
| R47 | R, RF | 88–360 N·m | 16.79–163 | 0.25–1.1 kW | 14.0 kg |
| R57 | R, RF, RX, RXF | 1–555 N·m | 1.3–187 | 0.12–5.5 kW | 9.0–24.0 kg |
| R67 | R, RF, RX, RXF | 4–595 N·m | 1.3–200 | 0.12–7.5 kW | 12.0–29.0 kg |
| R77 | R, RF, RX, RXF | 21–755 N·m | 1.42–195 | 0.18–2.2 kW | 20.0–36.0 kg |
| R87 | R, RF, RX, RXF | 70–1850 N·m | 1.39–1737 | 0.18–22.0 kW | 35.0–63.0 kg |
| R97 | R, RF, RX, RXF | 146–3220 N·m | 1.42–290 | 0.25–30.0 kW | 59.0–118.0 kg |
| R107 | R, RF, RX, RXF | 205–5060 N·m | 1.44–251 | 1.5–45.0 kW | 88.0–130.0 kg |
| R137 | R, RF | 1240–10100 N·m | 5.15–8784 | 0.18–55.0 kW | 235.0 kg |
| R147 | R, RF | 700–16100 N·m | 5.0–8443 | 0.18–75.0 kW | 360.0 kg |
| R167 | R, RF | 4080–23100 N·m | 10.24–503 | 7.5–160.0 kW | 605.0 kg |
S family frames
| Frame | Observed variants | Torque envelope | Ratio envelope | Power envelope | Weight envelope |
|---|---|---|---|---|---|
| S37 | S, SA, SAF, SF | 16–101 N·m | 6.8–51 | 0.37 kW | 6.0–8.0 kg |
| S47 | S, SA, SAF, SF | 32–205 N·m | 9.23–185 | 0.25–0.55 kW | 10.0–14.0 kg |
| S57 | S, SA, SAF, SF | 101–360 N·m | 7.28–201 | 0.18–3.0 kW | 14.0–18.0 kg |
| S67 | S, SA, SAF, SF | 119–570 N·m | 7.56–217 | 0.18–4.0 kW | 25.0–32.0 kg |
| S77 | S, SA, SAF, SF | 205–1250 N·m | 8.06–225 | 0.37–7.5 kW | 45.0–55.0 kg |
| S87 | S, SA, SAF, SF | 545–2300 N·m | 7.88–288 | 0.37–15.0 kW | 76.0–101.0 kg |
| S97 | S, SA, SAF, SF | 1300–4550 N·m | 9.55–286 | 0.75–22.0 kW | 135.0–171.0 kg |
K family frames
| Frame | Observed variants | Torque envelope | Ratio envelope | Power envelope | Weight envelope |
|---|---|---|---|---|---|
| K37 | K, KA, KAF, KF | 40–225 N·m | 5.36–30 | 1.1–3.0 kW | 11.5–15.0 kg |
| K47 | K, KA, KAF, KF | 119–390 N·m | 5.81–132 | 0.37–3.0 kW | 18.0–22.5 kg |
| K57 | K, KA, KAF, KF | 100–685 N·m | 6.57–145 | 0.18–5.5 kW | 22.0–29.0 kg |
| K67 | K, KA, KAF, KF | 189–640 N·m | 7.28–145 | 0.25–5.5 kW | 30.0–37.0 kg |
| K77 | K, KA, KAF, KF | 365–1680 N·m | 7.24–154 | 0.37–11.0 kW | 46.0–62.0 kg |
| K87 | K, KA, KAF, KF | 525–3330 N·m | 7.21–3107 | 0.18–22.0 kW | 78.0–100.0 kg |
| K97 | K, KA, KAF, KF | 675–4960 N·m | 8.71–4669 | 0.18–22.0 kW | 130.0–171.0 kg |
| K107 | K, KA, KAF, KF | 1850–8890 N·m | 8.69–143 | 1.5–45.0 kW | 231.0–271.0 kg |
| K127 | K, KA, KAF, KF | 2090–15200 N·m | 8.68–136 | 4.0–90.0 kW | 381.0–452.0 kg |
| K157 | K, KA, KAF, KF | 4510–22100 N·m | 12.65–150 | 7.5–132.0 kW | Not yet transcribed |
| K167 | K, KH | 10100–37800 N·m | 24.52–164 | 7.5–75.0 kW | Not yet transcribed |
| K187 | K, KH | 21600–62800 N·m | 45.5–180 | 15.0–75.0 kW | Not yet transcribed |
F family frames
| Frame | Observed variants | Torque envelope | Ratio envelope | Power envelope | Weight envelope |
|---|---|---|---|---|---|
| F37 | F, FA, FAF, FF | 20–240 N·m | 3.77–118 | 0.12–3.0 kW | 12.0–15.0 kg |
| F47 | F, FA, FAF, FF | 148–425 N·m | 8.96–191 | 0.25–3.0 kW | 17.0–21.0 kg |
| F57 | F, FA, FAF, FF | 139–665 N·m | 5.18–200 | 0.25–5.5 kW | 24.0–31.0 kg |
| F67 | F, FA, FAF, FF | 146–920 N·m | 3.97–229 | 0.18–5.5 kW | 27.0–37.0 kg |
| F77 | F, FA, FAF, FF | 260–1710 N·m | 4.28–282 | 0.18–9.2 kW | 50.0–66.0 kg |
| F87 | F, FA, FAF, FF | 495–3180 N·m | 4.12–345 | 0.37–22.0 kW | 90.0–112.0 kg |
| F97 | F, FA, FAF, FF | 1520–5000 N·m | 11.16–277 | 0.75–22.0 kW | 150.0–190.0 kg |
| F107 | F, FA, FAF, FF | 1500–9070 N·m | 6.22–950 | 1.5–37.0 kW | 225.0–269.0 kg |
| F127 | F, FA, FAF, FF | 1670–19500 N·m | 4.68–727 | 1.5–90.0 kW | 365.0–447.0 kg |
| F157 | F, FA, FAF, FF | 5050–22500 N·m | 11.92–218 | 5.5–200.0 kW | 610.0–740.0 kg |
How to use this comparison page
Use the family and frame table to prepare an enquiry, then send the existing nameplate and application details through Send your nameplate. State the load, output arrangement, operating environment and any existing motor or brake information. HaoRan Transmission can then review the catalogue envelope alongside the installed interface and issue a quotation only after the relevant mounting checks are complete.
<p class=”catalogue-source”>Source: HaoRan RSKF catalogue 2024. Frame envelopes include confirmed catalogue rows only.</p>