Bosch Rexroth and Indramat, New Zealand

RFQ / Bosch Rexroth, Rexroth and Indramat

If your drive says Indramat, it is a Rexroth drive. The badge went Indramat, then Rexroth Indramat, then Bosch Rexroth, and the part numbers came through unchanged. On the hydraulic side the type code is the specification, and a single letter in it decides what your cylinder does when the power goes off.

Rexroth is on New Zealand presses, injection moulding, forestry, mobile plant and heavy machinery. Much of the electric drive side is obsolete and still working, and the hydraulic side is a live consumable business.

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Reference pages

Page	Covers
Hydraulic valves	Reading a 4WE type code, NG sizes and why valves interchange between brands, spool symbols and what the actuator does when de-energised, coils as separate parts, proportional valves and amplifier cards, and contamination

The badge history

Badge	Era
Indramat	The original electric drives company. Most legacy servo hardware
Rexroth Indramat	After the acquisition
Mannesmann Rexroth	The hydraulics side of the same period
Bosch Rexroth	Current

A DDS drive badged Indramat and one badged Rexroth Indramat are the same product. Send the type code and the badge does not matter.

This is the same situation as Emerson on a Control Techniques drive, which is on our Control Techniques page. Industrial brands change hands and the part numbers usually survive.

One thing that did move

The Rexroth pneumatics business became Aventics and is now part of Emerson. So a Rexroth-badged pneumatic valve is a different lineage from a Rexroth hydraulic valve.

We supply both. Tell us whether the part is hydraulic or pneumatic if the label is ambiguous, because it changes where we source it.

The four sides of this brand

Side	Typical part numbers
Hydraulics	4WE, 4WRE, DBW, DR, Z2S, A10VSO, A4VSO, PGH
Electric drives and controls	HCS, HMS, HMV, MSK, DDS, TDM, KDS, DKC, MDD, MKD, MHD
Control and I/O	IndraControl L, VCP panels, R-IL inline I/O
Assembly technology	Aluminium profile, ball rail linear guides, ball screws

Hydraulics

Family	What it is
4WE, 4WEH	Directional spool valves. The volume item
4WRE, 4WRA, 4WRZ, 4WRPE	Proportional directional valves
DB, DBW, DBDS	Pressure relief valves
DR, DRE, ZDR	Pressure reducing valves
Z2S, SV, SL	Check and pilot operated check valves
Z2FS, 2FRM	Throttle and flow control valves
A10VSO, A4VSO, A11VO	Variable displacement axial piston pumps
PGH, PGF, PVV, PVQ	Gear and vane pumps
CDT3, CGH2, CDH1	Hydraulic cylinders
VT-VSPA, VT-MSPA, VT-3000	Amplifier cards for proportional valves
HAB, HAD, ABZMS	Accumulators and accessories

Electric drives, current and legacy

Generation	Drives	Motors
IndraDrive, current	HCS02, HCS03, HMS, HMD, HMV, HCS01	MSK, MAD, MAF, MS2N
EcoDrive, legacy	DKC	MKD, MHD
Indramat, legacy	DDS, TDM, KDS, TVD, TVM, KDV	MDD, MAC, MKD
Controllers	CLM, MTS, MTC, ISP

DDS, TDM and KDS are long obsolete and still running presses and machine tools here. Those are the ones we are asked for most on the electric side, and like any servo product the drive, the motor and the feedback have to agree.

Older Indramat drives carry a personality or programming module holding the firmware and parameters for that axis. As on every platform, that small removable part matters more than it looks. Take it out before the drive leaves the site.

Control and I/O

Rexroth R-IL inline I/O is closely related to the Phoenix Contact Inline system, so if you are looking at Rexroth-badged inline terminals, our Phoenix Contact page is relevant too.

The hydraulic type code is the specification

Same principle as every configured product on this site.

Take 4WE6D6X/EG24N9K4.

Field	Means
4	Number of main ports
WE	Directional spool valve, solenoid operated
6	NG size. NG6 is the common small valve
D	Spool symbol. What the valve does in each position
6X	Series
G24	Solenoid voltage. 24 V DC
Trailing characters	Connector type, seals, spool variant and options

The spool symbol is the letter that decides machine behaviour, and it gets its own section on the hydraulic valves page because substituting it is a safety decision rather than a preference.

NG sizes mean valves interchange between brands

Genuinely useful, and it widens what we can offer you.

Hydraulic directional valve mounting faces are standardised. The bolt pattern, the port positions and the dimensions for a given size are common across manufacturers.

Rexroth NG	Also called
NG6	CETOP 3, D03
NG10	CETOP 5, D05
NG16	CETOP 7, D07
NG25	CETOP 8, D08

So a valve from another manufacturer will physically bolt onto the same manifold. That matters when a Rexroth part has a long lead time and the machine is down.

What is not standardised is the spool, the flow rating, the response and the electrical connection. So an equivalent valve is a real option and it is not automatically a drop-in.

We will offer an interchange where it is genuinely suitable, and tell you what differs. On a proportional or servo valve, or anything safety related, we will normally recommend staying with the original.

Contamination is the biggest issue in hydraulics

Worth stating plainly, because it explains most repeat failures.

The majority of hydraulic component failures are caused by dirty oil. Not wear, not age, and not the component.

Symptom	Often
The same valve fails repeatedly	Oil cleanliness, not the valve
Proportional valve drifts or sticks	Contamination. They are the most sensitive parts in the system
Pump wears out early	Contamination, aeration or cavitation
System runs hot	Internal leakage, relief valve bypassing, or cooler fouled
Erratic movement	Air in the oil, or a sticking spool

Proportional and servo valves need cleaner oil than ordinary directional valves. Fitting one into a system that was only ever kept clean enough for on-off valves will destroy it, and it will look like a faulty valve.

Three checks worth making before ordering a replacement valve:

When was the filter element last changed, and is the indicator in the red.

Is there a breather on the tank, and is it doing anything.

Has anyone had an oil sample tested. A cleanliness result costs very little against a proportional valve.

If a machine eats one particular valve, the answer is upstream of the valve. Same pattern as air quality in pneumatics and panel temperature in electronics.

Seals have to suit the fluid

Frequently missed, and it produces a failure weeks later.

Fluid	Note
Mineral oil	The standard seal specification suits it
Fire resistant fluids	Need a different seal specification
Biodegradable fluids	Check compatibility
High temperature service	Changes the seal choice too

The seal specification is in the type code. So a valve ordered on the model number alone can arrive with seals that will not survive the fluid, and the failure comes months later as a leak or a swollen seal.

If the machine runs anything other than ordinary mineral oil, tell us the fluid. It is one line in an email and it prevents a repeat job.

Pumps: the case drain and the control

Point	Why it matters
Axial piston pumps need a case drain	Blocked or omitted, the pump destroys itself
The control type is in the type code	Pressure, pressure and flow, or direct control. Not interchangeable
Rotation direction is specified	Running a pump backwards damages it
Shaft and mounting	Splined or keyed, flange standard
Suction conditions	A restricted suction line causes cavitation, which sounds like bearing noise

A pump that has become noisy is often cavitating rather than worn. Restricted suction strainer, low oil level, a partly closed suction valve or air being drawn in. Replacing the pump without fixing that destroys the new one too.

So on a noisy pump, check the suction side and the oil level before ordering. It is free and it is frequently the answer.

Before ordering a replacement

Symptom	Check first
Valve will not shift	The manual override on the solenoid, then the coil
Same valve keeps failing	Oil cleanliness and the filter
Proportional valve drifting	Contamination, then the amplifier card and its tuning
Pump noisy	Suction side and oil level. Likely cavitation
System hot	Relief valve bypassing, internal leakage, cooler fouled
Cylinder creeps down	Pilot operated check or counterbalance valve, not the cylinder
Leak weeks after a valve change	Seal specification against the fluid
Movement erratic	Air in the oil, or a sticking spool

What to send us

The full type code off the component. All of it.

A photo of the part on the machine, which shows the manifold, the connections and the electrical arrangement.

The solenoid voltage and connector type.

What fluid the system runs.

Whether a proportional valve uses an amplifier card or has electronics on board.

On an electric drive, the drive, motor and feedback type codes together.

The symptom. A coil or a filter element may be the answer.

What we can supply

Hydraulic valves. Directional, pressure, flow, check and proportional valves across the NG sizes, plus solenoid coils and connectors.

Pumps and motors. Axial piston, gear and vane pumps, with the control variants.

Electronics. Amplifier cards for proportional valves.

Cylinders and accumulators. Plus seal kits where they exist.

Electric drives. IndraDrive current hardware, and obsolete Indramat DDS, TDM, KDS, DKC and their MDD, MKD and MHD motors, as surplus and tested used.

Control and I/O. IndraControl, VCP panels and R-IL inline I/O.

Interchange. Where an equivalent valve from another manufacturer fits the same NG mounting and is genuinely suitable, we will offer it and tell you what differs.

We buy Rexroth and Indramat

Indramat drives and motors hold real value, because the machines running them cannot buy new and a retrofit means new drives, new motors and new cabling.

Keep programming or personality modules with their drives, keep motors with the cables and feedback they ran, and keep solenoid coils on their valves. Matched sets are worth considerably more. See Sell To Us.

Common questions

Can you get a part that is not listed on your site?
Usually. The site shows what we hold, not what we can source.

My drive says Indramat. Is that Rexroth?
Yes. Same product, earlier badge. Send the type code.

Can I fit another brand's valve?
Mechanically, often yes, because the NG mounting is standardised. The spool, flow rating and connection still have to match.

Why does the same valve keep failing?
Almost always oil cleanliness. Check the filter, the breather and get an oil sample tested.

My pump has got noisy.
Suspect cavitation before wear. Check the suction line, strainer and oil level.

Do I need the whole valve?
Often not. Solenoid coils are separate parts and they are a fraction of the price.

Do you supply used equipment?
On electric drives yes, tested before shipping. On hydraulics we generally supply new, because seals and internal clearances are wear items.

What is the lead time?
Ex stock items ship the next working day within New Zealand. We give you a firm lead time with the quote.

Do you quote in NZD?
Yes, in NZD including GST for New Zealand customers.

Send us your type codes

The whole string, and tell us what fluid the system runs. On hydraulics the seal specification is in the code and it is what decides whether the part lasts. Quotes in NZD including GST.

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Industech is an independent supplier of new, surplus and used industrial automation equipment. We are not an authorised distributor of, approved by, sanctioned by, or affiliated with Bosch Rexroth. Bosch Rexroth, Rexroth, Indramat, IndraDrive, IndraDyn, IndraControl and EcoDrive are trademarks of Bosch Rexroth AG. Aventics is a trademark of Emerson Electric Co. All trademarks, brand names and type codes are the property of their respective owners and are used here for identification purposes only.