Liftmaster K19-25087M, CHAIN, #25X87 WITH ML
The LiftMaster K19-25087M is a #25 pitch replacement chain supplied in an 87-link length with the master link included. It is used on compact slide gate operator drive assemblies where a lighter, smaller chain profile is part of the original design. In compatible RSL12V-style operators, the chain helps transfer motor movement through the drive system so the gate can travel consistently along the track. Chain stretch, contamination, or seized links can create rough operation and may strain sprockets or bearings. This part should be matched by chain size and link count, since even one incorrect link length can affect tension and gate travel.
Features & Specifications
| Feature / Specification | Details |
|---|
| Manufacturer | LiftMaster |
| Product Type | Roller chain with master link |
| Part Number | K19-25087M |
| Chain Size | Number 25 |
| Link Count | 87 |
| Master Link | Included |
| Application | Drive chain for select compact slide gate operators |
| Compatible Operator Type | RSL12V and RSL12VH slide gate operators |
| Notes | Verify RSL generation and parts diagram before ordering |
Compatible With
This part may be used with the following operators or product families when the original part number and parts diagram match:
- LiftMaster RSL12V slide gate operators
- LiftMaster RSL12VH slide gate operators
- Select RSL12V / RSL12VH service assemblies using #25 x 87 chain with master link
- Verify before using on RSL12U, RSL12UL, or newer slide gate models because generations may use different drive parts
Also Known As / Related Part Numbers
- K19-25087M
- 19-25087M
- 1925087M
- LiftMaster #25 x 87 chain
- Chain #25x87 with ML
- RSL12V chain with master link
Technician Note
Chain, spring, and limit-system parts should be matched by the original part number and by the operator parts diagram. Similar-looking parts can vary by chain size, pitch count, spring dimension, operator generation, finish, and whether a master link is included.
Before Ordering Checklist
- Confirm the manufacturer part number on the old part or parts diagram
- Verify the operator model and generation
- Compare chain size, pitch count, finish, spring size, or kit contents as applicable
- Inspect related sprockets, bearings, clips, brackets, and limit hardware for wear
- Do not substitute a different chain size, spring, or master link without confirming the parts diagram
Professional Advisory
Gate operators, barrier systems, and traffic control equipment include moving mechanical parts that can create pinch, crush, or stored-tension hazards. Disconnect power where required and use a qualified gate technician when servicing drive chains, limit systems, torsion springs, or traffic spike hardware.
Product Questions & Answers
What models commonly use K19-25087M?
It is commonly listed for LiftMaster RSL12V and RSL12VH slide gate operators.
Does this chain include the master link?
Yes. K19-25087M is a #25 x 87 chain with a master link included.
Can this chain be used on RSL12U or RSL12UL?
Do not assume that. RSL12V/RSL12VH and later UL models can use different service parts, so verify the parts diagram.
What symptoms suggest the chain needs replacement?
Noise, chain stretch, tight links, rough travel, skipping, or poor tension adjustment can point to worn chain or sprocket issues.
Should I replace the sprockets too?
Inspect the sprockets. If the teeth are hooked, sharp, or badly worn, a new chain may wear quickly on the old sprockets.
