Bucking Unit Specifications | Size, Torque, Flow & Speed Chart

Technical Data Reference

This page summarizes the current Goldenman GM Series bucking unit technical data by size platform, torque class, hydraulic flow and rotational speed. It is intended as a specification reference for engineers, buyers and technical evaluators comparing equipment capability.

2 3/8"–24"Working size coverage

25–260 kN·mMaximum torque range

80–230 L/minWorking flow range

≥16 MPaRated pressure in current data

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Quick Answer:
The current GM bucking unit range covers working sizes from 2 3/8 in. to 24 in., maximum torque classes from 25 to 260 kN·m, working flow from 80 to 230 L/min, and model-dependent speeds up to 12 rpm. The supplied technical data lists rated hydraulic pressure as ≥16 MPa (≥2320 psi).

GM Bucking Unit Size, Torque, Flow & Speed Chart

The chart below groups the current GM configurations by size platform. It is designed as a technical reference rather than a model-selection guide.

GM Series	Working Size	Available Maximum Torque	Working Flow	Speed Range
GM 4 1/2	60–114.3 mm / 2 3/8"–4 1/2"	25 kN·m	80–120 L/min	0–10 rpm
GM 5 1/2	60–139.7 mm / 2 3/8"–5 1/2"	25 kN·m	80–120 L/min	0–6 rpm
GM 7 5/8	60–195 mm / 2 3/8"–7 5/8"	25 kN·m	80–160 L/min	0–6 rpm
GM 9 5/8	60–244.5 mm / 2 3/8"–9 5/8"	40 kN·m	80–160 L/min	0–6 rpm
GM 10	60–254 mm / 2 3/8"–10"	70 / 136 kN·m	80–160 L/min	0–6 rpm
GM 13	60–339.7 mm / 2 3/8"–13 3/8"	70 kN·m	80–160 L/min	0–6 rpm
GM 14	60–355.6 mm / 2 3/8"–14"	150 / 180 kN·m	120–230 L/min	0–6 rpm
GM 18	60–457.2 mm / 2 3/8"–18"	70 / 160 / 210 / 250 kN·m	120–230 L/min	0–10 or 0–6 rpm
GM 20	Source data: 60–550 mm / 2 3/8"–20"	70 / 110 kN·m	120–230 L/min	0–6 rpm
GM 22	60–558.8 mm / 2 3/8"–22"	160 kN·m	120–230 L/min	0–6 rpm
GM 24	60–615 mm / 2 3/8"–24"	70 / 96 / 140 / 160 / 210 / 260 kN·m	120–230 L/min	0–5 to 0–12 rpm, by model

Technical note: the current source table lists the GM 20 series as 60–550 mm and 2 3/8"–20". These values are reproduced as supplied and should not be treated as a direct metric/imperial unit conversion.

How to Read the Bucking Unit Specification Fields

Working Size

Working size describes the diameter range covered by a given GM platform in the supplied technical data. It is expressed in both millimeters and inches where available.

Maximum Torque

Maximum torque is the highest torque rating listed for the corresponding configuration. Several frame sizes are available with more than one torque class.

Working Flow

Working flow is the hydraulic flow range specified for the equipment. The current GM data ranges from 80–120 L/min on smaller configurations to 120–230 L/min on larger platforms.

Speed

Speed is the listed rotational speed range for the relevant model. Different torque configurations within the same frame size may have different maximum rpm values.

Bucking Unit Torque Range by GM Platform

Torque Class	GM Configurations in Current Data
25 kN·m	GM 4 1/2-25, GM 5 1/2-25, GM 7 5/8-25
40 kN·m	GM 9 5/8-40
70 kN·m	GM 10-70, GM 13-70, GM 18-70, GM 20-70, GM 24-70
96 kN·m	GM 24-96
110 kN·m	GM 20-110
136 kN·m	GM 10-136
140 kN·m	GM 24-140
150 kN·m	GM 14-150
160 kN·m	GM 18-160, GM 22-160, GM 24-160
180 kN·m	GM 14-180
210 kN·m	GM 18-210, GM 24-210
250 kN·m	GM 18-250
260 kN·m	GM 24-260

Hydraulic Pressure and Flow Data

The current supplied GM technical tables list rated hydraulic pressure as ≥16 MPa (≥2320 psi). Working flow varies by frame size.

GM Platform Range	Working Flow in Current Data	Rated Pressure in Current Data
GM 4 1/2–GM 5 1/2	80–120 L/min	≥16 MPa / ≥2320 psi
GM 7 5/8–GM 13	80–160 L/min	≥16 MPa / ≥2320 psi
GM 14–GM 24	120–230 L/min	≥16 MPa / ≥2320 psi

This table reproduces the hydraulic values provided in the current GM source data. It does not add unsupported motor, reservoir, power-unit or system-efficiency assumptions.

Bucking Unit Speed Data

Rotational speed varies by model and torque configuration. The current data includes configurations from 0–5 rpm up to 0–12 rpm.

Example Model	Maximum Torque	Speed
GM 4 1/2-25	25 kN·m	0–10 rpm
GM 18-70	70 kN·m	0–10 rpm
GM 24-96	96 kN·m	0–8 rpm
GM 24-140	140 kN·m	0–12 rpm
GM 24-160	160 kN·m	0–7 rpm
GM 24-210	210 kN·m	0–5 rpm
GM 24-260	260 kN·m	0–5 rpm

GM Bucking Unit Specification Summary

Specification Item	Current GM Series Range
Working Size	2 3/8"–24"
Maximum Torque	25–260 kN·m
Working Flow	80–230 L/min, model dependent
Rated Hydraulic Pressure	≥16 MPa / ≥2320 psi in supplied data
Rotational Speed	Up to 12 rpm, model dependent
Current Model Configurations	22

Need the Full 22-Model Product Table?

The GM commercial product page contains the complete current model range together with product applications, configuration information and RFQ details.

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Frequently Asked Specification Questions

What is the maximum torque in the current GM bucking unit range?

The highest maximum torque listed in the current GM data is 260 kN·m on the GM 24-260 configuration.

What is the largest working size in the current GM range?

The current largest platform is the GM 24 series, with a listed working range up to 24 in.

What hydraulic pressure is listed for the GM bucking unit range?

The supplied technical tables list rated hydraulic pressure as ≥16 MPa, equivalent to ≥2320 psi.

What hydraulic flow range is shown in the GM data?

The current model tables show working flow from 80–120 L/min on smaller configurations up to 120–230 L/min on larger configurations.

What is the highest listed bucking unit speed?

The highest speed in the current supplied data is 0–12 rpm on the GM 24-140 configuration.

Why do models with the same maximum size have different torque ratings?

The current GM tables include several torque configurations within the same frame-size platform. This page reports those configurations as supplied without assuming identical internal design or hydraulic performance between models.

Need Product-Level Specifications or a Technical Quote?

View the GM Bucking Unit product page for the complete current model table, product configuration information and quotation contact.

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Bucking Unit Specifications: Size, Torque, Flow & Speed Chart

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GM Bucking Unit Size, Torque, Flow & Speed Chart